C3.ai (AI) 10-K 25 Jun 21 2021 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Apr. 30, 2021	Jun. 18, 2021
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Apr. 30, 2021
Current Fiscal Year End Date	--04-30
Document Transition Report	false
Entity File Number	001-39744
Entity Registrant Name	C3.ai, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-3999357
Entity Address, Address Line One	1300 Seaport Blvd,
Entity Address, Address Line Two	Suite 500
Entity Address, City or Town	Redwood City,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94063
City Area Code	650
Local Phone Number	503-2200
Title of 12(b) Security	Class A Common Stock, par value $0.001 per share
Trading Symbol	AI
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float	$ 4.3
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement relating to its 2021 annual meeting of shareholders (the “2021 Proxy Statement”) are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. The 2021 Proxy Statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the registrant’s fiscal year ended April 30, 2021.
Amendment Flag	false
Entity Central Index Key	0001577526
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		99,920,942
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		3,499,992

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Apr. 30, 2021	Apr. 30, 2020
Current assets
Cash and cash equivalents		$ 115,355	$ 33,104
Short-term investments		978,020	211,874
Accounts receivable, net of allowance of $812 and $755 as of April 30, 2021 and 2020, respectively	[1]	65,460	30,827
Prepaid expenses and other current assets	[2]	14,302	5,400
Total current assets		1,173,137	281,205
Property and equipment, net		6,133	8,723
Goodwill		625	625
Long-term investments		0	725
Other assets, non-current	[3]	16,582	13,830
Total assets		1,196,477	305,108
Current liabilities
Accounts payable	[4]	12,075	4,726
Accrued compensation and employee benefits		21,829	13,693
Deferred revenue, current	[5]	72,263	53,537
Accrued and other current liabilities	[6]	18,318	9,083
Total current liabilities		124,485	81,039
Deferred revenue, non-current		2,964	6,758
Other long-term liabilities	[7]	7,853	6,001
Total liabilities		135,302	93,798
Commitments and contingencies (note 7)
Stockholders’ equity (deficit)
Additional paid-in capital		1,410,325	110,485
Accumulated other comprehensive income		81	424
Accumulated deficit		(349,333)	(293,637)
Total stockholders’ equity (deficit)		1,061,175	(182,697)
Total liabilities, redeemable convertible preferred stock, redeemable convertible Class A-1 common stock and stockholders’ equity (deficit)		1,196,477	305,108
Redeemable Convertible Preferred Stock
Current liabilities
Carrying Value		0	375,207
Redeemable Convertible A-1 Common Stock
Current liabilities
Carrying Value		0	18,800
Class A Common Stock
Stockholders’ equity (deficit)
Common stock		99	31
Class B Common Stock
Stockholders’ equity (deficit)
Common stock		$ 3	$ 0
[1]	Including amounts from a related party of $15,180 and $250 as of April 30, 2021 and 2020, respectively.
[2]	Including amounts from a related party of $1,662 and nil as of April 30, 2021 and 2020, respectively.
[3]	Including amounts from a related party of $6,602 and nil as of April 30, 2021 and 2020, respectively.
[4]	Including amounts from a related party of $56 and nil as of April 30, 2021 and 2020, respectively.
[5]	Including amounts from a related party of $7,697 and $1,499 as of April 30, 2021 and 2020, respectively.
[6]	Including amounts from a related party of $3,413 and nil as of April 30, 2021 and 2020, respectively.
[7]	Including amounts from a related party of $4,895 and nil as of April 30, 2021 and 2020, respectively.

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands		Apr. 30, 2021	Apr. 30, 2020
Accounts receivable, allowance		$ 812	$ 755
Common stock, shares outstanding (in shares)		3,499,992
Accounts receivable, net, from related party		$ 15,180	250
Prepaid expenses and other current assets, from related party	[1]	14,302	5,400
Other assets, non-current, from related party	[2]	16,582	13,830
Accounts payable, from related party		56	0
Deferred revenue, current, from related party	[3]	72,263	53,537
Accrued and other current liabilities, from related party	[4]	18,318	9,083
Other long-term liabilities, from related party		4,895	0
Related Party
Prepaid expenses and other current assets, from related party		1,662	0
Other assets, non-current, from related party		6,602	0
Deferred revenue, current, from related party		7,697	1,499
Accrued and other current liabilities, from related party		$ 3,413	$ 0
Redeemable Convertible Preferred Stock
Par value (in dollars per share)		$ 0.001	$ 0.001
Shares authorized (in shares)		0	233,107,379
Shares issued (in shares)		0	37,128,768
Shares outstanding (in shares)		0	37,128,768
Liquidation Amount			$ 376,178
Redeemable Convertible A-1 Common Stock
Par value (in dollars per share)		$ 0.001	$ 0.001
Shares authorized (in shares)		0	6,666,667
Shares issued (in shares)		0	6,666,665
Shares outstanding (in shares)		0	6,666,665
Liquidation Amount			$ 18,800
Class A Common Stock
Common stock, par value (in dollars per share)		$ 0.001	$ 0.001
Common stock, shares authorized (in shares)		1,000,000,000	390,000,000
Common stock, shares issued (in shares)		98,667,121	31,210,159
Common stock, shares outstanding (in shares)		98,667,121	31,210,159
Class B Common Stock
Common stock, par value (in dollars per share)		$ 0.001	$ 0.001
Common stock, shares authorized (in shares)		3,500,000	21,000,000
Common stock, shares issued (in shares)		3,499,992	0
Common stock, shares outstanding (in shares)			0
[1]	Including amounts from a related party of $1,662 and nil as of April 30, 2021 and 2020, respectively.
[2]	Including amounts from a related party of $6,602 and nil as of April 30, 2021 and 2020, respectively.
[3]	Including amounts from a related party of $7,697 and $1,499 as of April 30, 2021 and 2020, respectively.
[4]	Including amounts from a related party of $3,413 and nil as of April 30, 2021 and 2020, respectively.

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands		12 Months Ended
		Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Revenue
Total revenue		$ 183,217	$ 156,666	$ 91,605
Cost of revenue
Total cost of revenue		44,519	38,787	30,386
Gross profit		138,698	117,879	61,219
Operating expenses
Sales and marketing	[1]	96,991	94,974	37,882
Research and development		68,856	64,548	37,318
General and administrative		33,109	29,854	22,061
Total operating expenses		198,956	189,376	97,261
Loss from operations		(60,258)	(71,497)	(36,042)
Interest income		1,255	4,251	3,508
Other income (expense), net		4,011	(1,752)	(546)
Net loss before provision for income taxes		(54,992)	(68,998)	(33,080)
Provision for income taxes		704	380	266
Net loss		$ (55,696)	$ (69,378)	$ (33,346)
Class A Common Stock
Operating expenses
Net loss attributable to common stockholders, basic and diluted (in dollars per share)		$ (0.90)	$ (1.94)	$ (1.32)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)		56,677,947	29,133,157	18,662,237
Redeemable Convertible A-1 Common Stock
Operating expenses
Net loss attributable to common stockholders, basic and diluted (in dollars per share)		$ (0.55)	$ (1.94)	$ (1.32)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)		6,666,665	6,666,665	6,666,665
Class B Common Stock
Operating expenses
Net loss attributable to common stockholders, basic and diluted (in dollars per share)		$ (0.35)	$ 0	$ 0
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)		3,499,992	0	0
Subscription
Revenue
Total revenue	[2]	$ 157,366	$ 135,394	$ 77,472
Cost of revenue
Total cost of revenue	[3]	31,315	31,479	24,560
Professional services
Revenue
Total revenue	[4]	25,851	21,272	14,133
Cost of revenue
Total cost of revenue		$ 13,204	$ 7,308	$ 5,826
[1]	Including related party sales and marketing expense of $44, nil and nil for the fiscal years ended April 30, 2021, 2020 and 2019, respectively.
[2]	Including related party revenue of $30,557, $40,425, and $56 for the fiscal years ended April 30, 2021, 2020, and 2019, respectively.
[3]	Including related party cost of revenue of $56, nil and nil for the fiscal years ended April 30, 2021, 2020 and 2019, respectively.
[4]	Including related party revenue of $4,825, $292, and nil for the fiscal years ended April 30, 2021, 2020, and 2019, respectively.

CONSOLIDATED STATEMENTS OF OP_2

CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands		12 Months Ended
		Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Related party cost of revenue		$ 44,519	$ 38,787	$ 30,386
Related party sales and marketing	[1]	96,991	94,974	37,882
Investor
Related party sales and marketing		44	0	0
Subscription
Related party cost of revenue	[2]	31,315	31,479	24,560
Subscription | Investor
Related party revenue		30,557	40,425	56
Related party cost of revenue		56	0	0
Professional services
Related party cost of revenue		13,204	7,308	5,826
Professional services | Investor
Related party revenue		$ 4,825	$ 292	$ 0
[1]	Including related party sales and marketing expense of $44, nil and nil for the fiscal years ended April 30, 2021, 2020 and 2019, respectively.
[2]	Including related party cost of revenue of $56, nil and nil for the fiscal years ended April 30, 2021, 2020 and 2019, respectively.

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (55,696)	$ (69,378)	$ (33,346)
Other comprehensive (loss) income
Unrealized (loss) gain on investment securities, net of tax	(343)	350	75
Total comprehensive loss	$ (56,039)	$ (69,028)	$ (33,271)

CONSOLIDATED STATEMENTS OF REDE

CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK, REDEEMABLE CONVERTIBLE CLASS A-1 COMMON STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Initial Public Offering and Private Placements	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Common StockInitial Public Offering and Private Placements	Additional Paid-In Capital	Additional Paid-In CapitalInitial Public Offering and Private Placements	Additional Paid-In CapitalCumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive (Loss) Income	Accumulated Deficit	Accumulated DeficitCumulative Effect, Period of Adoption, Adjustment	Redeemable Convertible Preferred Stock	Series G Preferred Stock	Series H Preferred Stock	Redeemable Convertible A-1 Common Stock
Beginning Balance, shares (in shares) at Apr. 30, 2018												31,582,000			6,667,000
Beginning Balance, Amount at Apr. 30, 2018												$ 248,471			$ 18,800
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of Preferred Stock, net of issuance costs (in shares)													2,610,000
Issuance of Preferred Stock, net of issuance costs													$ 51,494
Ending Balance, shares (in shares) at Apr. 30, 2019												34,192,000			6,667,000
Ending Balance, Amount at Apr. 30, 2019												$ 299,965			$ 18,800
Beginning Balance, shares (in shares) at Apr. 30, 2018				18,568,000
Beginning Balance, Amount at Apr. 30, 2018	$ (139,830)		$ 0	$ 19		$ 50,999		$ 66	$ (1)	$ (190,847)	$ (66)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options (in shares)				1,489,000
Issuance of Class A common stock upon exercise of stock options	1,839			$ 1		1,838
Vesting of early exercised Class A common stock options	1,561					1,561
Stock-based compensation expense	4,267					4,267
Other comprehensive income (loss)	75								75
Net loss	(33,346)									(33,346)
Ending Balance, shares (in shares) at Apr. 30, 2019				20,057,000
Ending Balance, Amount at Apr. 30, 2019	(165,434)			$ 20		58,731			74	(224,259)
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of Preferred Stock, net of issuance costs (in shares)													1,283,000	1,654,000
Issuance of Preferred Stock, net of issuance costs													$ 25,406	$ 49,836
Ending Balance, shares (in shares) at Apr. 30, 2020												37,128,768	3,893,701	1,653,928	6,666,665
Ending Balance, Amount at Apr. 30, 2020												$ 375,207	$ 76,900	$ 49,836	$ 18,800
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)				9,530,000
Issuance of common stock	$ 44,027			$ 10		44,017
Issuance of Class A common stock upon exercise of stock options (in shares)	1,809,000			1,787,000
Issuance of Class A common stock upon exercise of stock options	$ 2,321			$ 2		2,319
Vesting of early exercised Class A common stock options	655					655
Tender offer repurchases (in shares)				(164,000)
Tender offer repurchases	(3,548)			$ (1)		(3,547)
Stock-based compensation expense	8,310					8,310
Other comprehensive income (loss)	350								350
Net loss	(69,378)									(69,378)
Ending Balance, shares (in shares) at Apr. 30, 2020				31,210,000
Ending Balance, Amount at Apr. 30, 2020	(182,697)			$ 31		110,485			424	(293,637)
Increase (Decrease) in Temporary Equity [Roll Forward]
Repayment of Shareholder Loan												$ 24,546
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)												(37,129,000)			(6,667,000)
Conversion of redeemable convertible preferred stock to common stock upon initial public offering												$ (399,753)			$ (18,800)
Ending Balance, shares (in shares) at Apr. 30, 2021												0			0
Ending Balance, Amount at Apr. 30, 2021												$ 0			$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repayment of Shareholder Loan	1,457					1,457
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)				43,796,000
Conversion of redeemable convertible preferred stock to common stock upon initial public offering	$ 418,553			$ 44		418,509
Issuance of common stock (in shares)					21,396,000
Issuance of common stock		$ 844,575			$ 21		$ 844,554
Issuance of Class A common stock upon exercise of stock options (in shares)	5,799,000			5,765,000
Issuance of Class A common stock upon exercise of stock options	$ 10,717			$ 6		10,711
Vesting of early exercised Class A common stock options	2,869					2,869
Stock-based compensation expense	21,740					21,740
Other comprehensive income (loss)		$ (343)							(343)
Net loss	$ (55,696)									(55,696)
Ending Balance, shares (in shares) at Apr. 30, 2021	3,499,992			102,167,000
Ending Balance, Amount at Apr. 30, 2021	$ 1,061,175			$ 102		$ 1,410,325			$ 81	$ (349,333)

CONSOLIDATED STATEMENTS OF RE_2

CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK, REDEEMABLE CONVERTIBLE CLASS A-1 COMMON STOCK AND STOCKHOLDERS' EQUITY DEFICIT (PARENTHETICAL) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended	12 Months Ended
	Aug. 31, 2019	Jun. 30, 2019	Apr. 30, 2019	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Issuance of Preferred Stock, issuance costs (unaudited)				$ 7,179	$ 0	$ 0
Series G Preferred Stock
Issuance of Preferred Stock, issuance costs (unaudited)		$ 100	$ 300		34	$ 257
Series H Preferred Stock
Issuance of Preferred Stock, issuance costs (unaudited)	$ 200				$ 164

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		12 Months Ended
		Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Cash flows from operating activities:
Net loss		$ (55,696)	$ (69,378)	$ (33,346)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization		4,297	1,302	550
Non-cash operating lease cost		3,315	3,052	0
Stock-based compensation expense		21,740	8,310	4,267
Impairment on investment		0	1,025	0
Other		(180)	(657)	534
Changes in operating assets and liabilities
Accounts receivable	[1]	(34,690)	32,659	(46,144)
Prepaid expenses, other current assets and other assets	[2]	(14,855)	(4,265)	(1,677)
Accounts payable	[3]	7,450	(1,219)	48
Accrued compensation and employee benefits		8,135	651	4,170
Operating lease liabilities		(3,551)	(3,174)	0
Other liabilities	[4]	11,549	1,343	(533)
Deferred revenue	[5]	14,933	(30,930)	37,255
Net cash used in operating activities		(37,553)	(61,281)	(34,876)
Cash flows from investing activities:
Purchases of property and equipment		(1,628)	(2,298)	(6,811)
Capitalized software development costs		0	(581)	0
Proceeds from sale of non-marketable equity security		725	0	0
Purchases of investments		(1,152,142)	(219,853)	(166,303)
Maturities and sales of investments		385,893	98,659	76,886
Net cash used in investing activities		(767,152)	(124,073)	(96,228)
Cash flows from financing activities:
Proceeds from initial public offering and private placements, net of underwriting discounts		851,859	0	0
Proceeds from repayment of shareholder loan		26,003	0	0
Repurchase of common stock and options in tender offer		0	(3,548)	0
Payment of deferred offering costs		(7,179)	0	0
Proceeds from issuance of common stock		0	44,027	0
Proceeds from exercise of Class A common stock options		16,673	4,203	2,905
Net cash provided by financing activities		887,356	119,851	54,472
Net increase (decrease) in cash, cash equivalents and restricted cash		82,651	(65,503)	(76,632)
Cash, cash equivalents and restricted cash at beginning of period		33,604	99,107	175,739
Cash and cash equivalents		115,355	33,104	98,607
Restricted cash included in other assets		900	500	500
Cash, cash equivalents and restricted cash at end of period		116,255	33,604	99,107
Total cash, cash equivalents and restricted cash		116,255	33,604	99,107
Supplemental disclosure of cash flow information—cash paid for income taxes		550	660	131
Supplemental disclosures of non-cash investing and financing activities:
Purchases of property and equipment included in accounts payable and accrued liabilities		212	417	60
Deferred offering costs included in accounts payable and accrued liabilities		105	0	0
Vesting of early exercised stock options		2,869	655	1,561
Investor
Changes in operating assets and liabilities
Prepaid expenses, other current assets and other assets		(8,264)	0	0
Other liabilities		8,308	0	0
Series G Preferred Stock
Cash flows from financing activities:
Proceeds from issuance of stock, net of issuance costs		0	25,333	51,567
Payment of deferred offering costs			(34)	(257)
Supplemental disclosures of non-cash investing and financing activities:
Series G issuance cost included in accounts payable		0	0	73
Series H Preferred Stock
Cash flows from financing activities:
Proceeds from issuance of stock, net of issuance costs		$ 0	49,836	$ 0
Payment of deferred offering costs			$ (164)
[1]	Including changes in related party balances of $(14,930), $19,750, and $(20,000) for the fiscal years ended April 30, 2021, 2020 and 2019, respectively.
[2]	Including changes in related party balances of $8,264, nil and nil for the fiscal years ended April 30, 2021, 2020 and 2019, respectively.
[3]	Including changes in related party balances of $56, nil and nil for the fiscal years ended April 30, 2021, 2020 and 2019, respectively.
[4]	Including changes in related party balances of $8,308, nil and nil for the fiscal years ended April 30, 2021, 2020 and 2019, respectively.
[5]	Including changes in related party balances of $6,198, $(18,445), and $19,944 for the fiscal years ended April 30, 2021, 2020, and 2019, respectively.

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands		12 Months Ended
		Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Related party balanced included in prepaid expenses, other current assets and other assets	[1]	$ 14,855	$ 4,265	$ 1,677
Related party balances included in other liabilities	[2]	11,549	1,343	(533)
Investor
Related party balances included in accounts receivable		(14,930)	19,750	(20,000)
Related party balanced included in prepaid expenses, other current assets and other assets		8,264	0	0
Related party balances included in accounts payable		56	0	0
Related party balances included in other liabilities		8,308	0	0
Related party balance included in deferred revenue		$ 6,198	$ (18,445)	$ 19,944
[1]	Including changes in related party balances of $8,264, nil and nil for the fiscal years ended April 30, 2021, 2020 and 2019, respectively.
[2]	Including changes in related party balances of $8,308, nil and nil for the fiscal years ended April 30, 2021, 2020 and 2019, respectively.

Summary of Business and Signifi

Summary of Business and Significant Accounting Policies	12 Months Ended
	Apr. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Business and Significant Accounting Policies	Summary of Business and Significant Accounting Policies Business C3.ai, Inc. (including its subsidiaries, “C3 AI” or “the Company”) is an enterprise artificial intelligence (“AI”) software provider. The Company’s C3 AI Suite supports accelerating digital transformation in various industries with prebuilt and configurable C3 AI Applications for business use cases including predictive maintenance, fraud detection, sensor network health, supply network optimization, energy management, anti-money laundering, and customer engagement. The Company supports customers in the United States, Europe, and the rest of the world. The Company was initially formed as a limited liability company in Delaware on January 8, 2009 and converted to a Delaware corporation in June 2012. Reclassification and Reverse Stock Split In November 2020, the Company amended and restated its certificate of incorporation to effect a reclassification of the Company’s prior Class B common stock and Class C common stock into Class A common stock and redeemable convertible Class B-1 common stock into a new redeemable convertible Class A-1 common stock. The rights, including the liquidation, dividend, and voting rights, are substantially identical for each class of common stock reclassified. All references to prior Class B common stock and Class C common stock have been recast to Class A common stock, and all references to redeemable convertible Class B-1 common stock have been recast to redeemable convertible Class A-1 common stock in these consolidated financial statements to give retrospective effect to the reclassification for all periods presented. The Company also authorized a new Class B common stock. The rights, including the liquidation and dividend rights, of the Class A common stock and the new Class B common stock are substantially identical, other than the voting rights and conversion rights upon transfer of the Class B common stock. See Note 9. Stockholders’ Equity for more information. Additionally, the Company effected a 6-for-1 reverse stock split of the Company’s outstanding common stock, preferred stock, and stock option awards. The par value of the common stock and preferred stock was not adjusted as a result of the reverse stock split. The authorized shares of the Class A common stock, new Class A-1 common stock, new Class B common stock and preferred stock were also adjusted to 390,000,000 shares, 6,666,667 shares, 21,000,000 shares, and 233,107,379 shares, respectively. All authorized, issued, and outstanding shares of common stock, preferred stock, stock option awards, and per share data included in these consolidated financial statements have been recast to give retrospective effect to the adjusted authorized shares and reverse stock split for all periods presented. Initial Public Offering and Concurrent Private Placements In December 2020, the Company completed its initial public offering (“IPO”), in which the Company issued and sold 17,825,000 shares of its Class A common stock at $42.00 per share, which included 2,325,000 shares issued upon the exercise of the underwriters’ over-allotment option to purchase additional shares. The Company received net proceeds of $694.6 million after deducting underwriting discounts and other offering expenses. In connection with the IPO: • all 33,628,776 shares of the Company’s outstanding redeemable convertible preferred stock, except the Series A* preferred stock, automatically converted into an equivalent number of shares of Class A common stock on a one-to-one basis; • all 3,499,992 shares of the Company’s outstanding redeemable convertible Series A* preferred stock automatically converted into an equivalent number of shares of Class B common stock on a one-to-one basis; • all 6,666,665 shares of the Company’s outstanding redeemable convertible Class A-1 common stock automatically converted into an equivalent number of shares of Class A common stock on a one-to-one basis; and • the Company amended and restated its certificate of incorporation which became effective upon completion of the IPO. Deferred offering costs consist primarily of direct and incremental accounting, legal and other fees related to the Company’s IPO. Prior to the IPO, all deferred offering costs incurred were capitalized and included in other assets on the consolidated balance sheet. Upon completion of the IPO, $7.2 million of deferred offering costs were reclassified into stockholders’ equity as a reduction of the IPO proceeds. The Company also completed a concurrent private placement immediately subsequent to the closing of the IPO, in which the Company issued and sold 2,380,952 and 1,190,476 shares, respectively, of its Class A common stock at $42.00 per share to Spring Creek Capital LLC, an affiliate of Koch Industries, Inc., and Microsoft Corporation, respectively (the “Concurrent Private Placement”). The Company received aggregate proceeds of $150.0 million and did not pay underwriting discounts with respect to the shares of Class A common stock that were sold in the Concurrent Private Placement. Basis of Presentation and Principles of Consolidation The Company prepares its consolidated financial statements in accordance with generally accepted accounting principles in the United States (“GAAP”). The consolidated financial statements include the accounts of C3.ai, Inc. and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Use of Estimates The preparation of the accompanying consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities, and reported amounts of revenue and expenses. Actual results and outcomes could differ significantly from the Company’s estimates, judgments, and assumptions. Significant estimates include determining standalone selling price for performance obligations in contracts with customers and estimating variable consideration, the estimated expected benefit period for deferred contract acquisition costs, the useful lives of long-lived assets and other assumptions used to measure stock-based compensation, and the valuation of deferred income tax assets and uncertain tax positions. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. The Company adjusts such estimates and assumptions when facts and circumstances dictate. Changes in those estimates resulting from continuing changes in the economic environment will be reflected in the financial statements in future periods. As future events and their effects cannot be determined with precision, actual results could materially differ from those estimates and assumptions. Fiscal Year The Company’s fiscal year ends on April 30. References to fiscal 2021, 2020 and 2019 relate to the fiscal years ended April 30, 2021, 2020 and 2019, respectively. Concentration of Risk Financial instruments that potentially subject the Company to concentration of credit risk consist of cash and cash equivalents, investments and accounts receivable. The majority of the Company’s cash and cash equivalents are held by one financial institution. The Company is exposed to that financial institution to the extent that its cash balance with that financial institution is in excess of Federal Deposit Insurance Company (“FDIC”) insurance limits. The Company’s investment policy is to invest in securities with a minimum rating of P1 by Moody’s, A1 by Standard & Poor’s, F-1 by Fitch’s or higher for short-term investments, and minimum rating of A2 by Moody’s, A by Standard & Poor’s, or A by Fitch’s or higher for long-term investments. Cash and Cash Equivalents The Company considers all highly liquid investments purchased with a maturity of three months or less to be cash equivalents. The Company’s cash equivalents consisted of investments in money market funds as of April 30, 2021 and 2020. Restricted Cash The Company had restricted cash pledged as security deposits at April 30, 2021 and 2020 of $0.9 million and $0.5 million, respectively, primarily representing a security deposit required by certain leases. The balance of restricted cash as of April 30, 2021 and 2020 was recorded as long-term other assets on the consolidated balance sheets. Investments The Company determines the appropriate classification of investments at the time of purchase and reevaluates such determination at each period-end. The Company’s investments, comprised of money market funds, U.S. treasury securities, certificates of deposit, U.S. government agency securities, commercial paper and corporate debt securities, are classified as available-for-sale marketable securities. Such securities are carried at estimated fair values and reported in cash equivalents, short-term investments or long-term investments. Unrealized gains and losses, net of tax, are reported in other comprehensive (loss) income as a separate component on the consolidated statements of comprehensive loss. Fair value is determined based on quoted market rates when observable or by utilizing data points that are observable, such as quoted prices, interest rates and yield curves. Declines in fair value judged to be other-than-temporary on available-for-sale marketable securities are recorded within other income (expense), net on the consolidated statements of operations. In order to determine whether a decline in value is other-than-temporary, the Company evaluates, among other factors, the duration and extent to which the fair value has been less than the carrying value and its intent and ability to retain the investment for a period of time sufficient to allow for any anticipated recovery in fair value. The cost of securities sold is based on the specific-identification method. Interest on securities classified as available-for-sale marketable securities is included in interest income on the consolidated statements of operations. Non-marketable equity securities without readily determinable fair values are recorded at cost, less impairment, and adjusted to fair value within other expense, net if there are observable price changes for identical or similar securities. Non-marketable equity securities are recorded within long-term investments. Impairment loss is recorded in other expense, net on the consolidated statements of operations. Prior to the adoption of ASU 2016-01 in the fiscal year beginning May 1, 2019, investments in non-marketable equity securities were recorded at cost less impairment, if any, with any losses resulting from an impairment recognized in other expense, net. Accounts Receivable Accounts receivable includes billed and unbilled receivables, net of allowance of doubtful accounts. Trade accounts receivable are recorded at invoiced amounts and do not bear interest. The expectation of collectability is based on a review of credit profiles of customers, contractual terms and conditions, current economic trends, and historical payment experience. The Company regularly reviews the adequacy of the allowance for doubtful accounts by considering the age of each outstanding invoice and the collection history of each customer to determine the appropriate amount of allowance for doubtful accounts. An allowance for doubtful accounts balance of $0.8 million and $0.8 million was recorded as of April 30, 2021 and 2020, respectively. Accounts receivable included unbilled receivables of as of April 30, 2021 and April 30, 2020 of $3.8 million and $0.5 million, respectively. Fair Value Measurements Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. Assets and liabilities that are measured at fair value are reported using a three-level fair value hierarchy that prioritizes the inputs used to measure fair value. This hierarchy maximizes the use of observable inputs and minimizes the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows: Level 1—Quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. Level 2—Inputs other than quoted prices in active markets that are observable for the asset or liability, either directly or indirectly. Level 3—Inputs that are unobservable for the asset or liability. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The carrying amounts of the Company’s financial instruments, including cash, cash equivalents, restricted cash, accounts receivable, accounts payable, and accrued expenses, approximate their fair value due to their short maturities. The fair value of the company’s investments is discussed in Note 3. Fair Value Measurements . Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets are comprised primarily of prepaid cloud subscriptions, other receivables, costs to obtain and fulfill a contract, prepaid software subscriptions, prepaid rent, and prepaid health insurance premiums. Property and Equipment Property and equipment are stated at cost less accumulated depreciation. Assets are depreciated using the straight-line method over useful lives of three Impairment of Long-Lived Assets The Company evaluates long-lived assets or asset groups for impairment whenever events indicate that the carrying value of an asset or asset group may not be recoverable based on expected future cash flows attributable to that asset or asset group. Recoverability of assets held and used is measured by comparing the carrying amount of an asset or an asset group to estimated undiscounted future net cash flows expected to be generated by the asset or asset group. If the carrying amount of an asset or asset group exceeds estimated undiscounted future cash flows, then an impairment charge would be recognized based on the excess of the carrying amount of the asset or asset group over its fair value. Assets to be disposed of are reported at the lower of their carrying amount or fair value less costs to sell. There were no impairment charges recognized related to long-lived assets during the fiscal years ended April 30, 2021 and 2020. Goodwill Goodwill is the amount by which the cost of acquired net assets in a business combination exceeds the fair value of the net identifiable assets on the date of purchase and is carried at its historical cost. The Company tests goodwill for impairment on an annual basis or more frequently if events or changes in circumstances indicate that the asset might be impaired. The Company performs its annual impairment test of goodwill as of February 1, and whenever events or circumstances indicate that the asset might be impaired. The tests did not result in an impairment to goodwill during the fiscal years ended April 30, 2021 and 2020. Leases The Company has lease arrangements that include lease and non-lease components. The Company has elected to not account for the lease and non-lease components separately. For leases that commenced before the Company’s adoption date of Accounting Standards Codification (“ASC”) Topic 842, Leases , the Company elected the practical expedient to not reassess the following: (1) whether any expired or existing contracts contain leases; (2) the lease classification for any expired or existing leases; and (3) initial direct costs for any existing leases. For short-term leases, defined as leases with a lease term of 12 months or less, the Company elected to not recognize an associated lease liability and right-of-use (“ROU”), asset. Lease payments for short-term leases are expensed on a straight-line basis over the lease term. The Company does not have financing leases. Operating lease ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at the commencement date based on the present value of remaining lease payments over the lease term. The Company uses the rate implicit in the lease when readily determinable at lease inception. If the implicit rate is not readily determinable, the Company uses its incremental borrowing rate based on the information available at the adoption date for leases that commenced prior to the adoption date and the commencement date for leases that commenced after the adoption date. The incremental borrowing rate assumptions include the lease term and the Company’s credit risk. The operating lease ROU asset also includes any advance lease payments made and excludes lease incentives. The Company’s lease terms include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Lease expense for lease payments is recognized on a straight-line basis as operating expense in the consolidated statements of operations over the lease term. Refer to Note 6. Leases for more information. Deferred Revenue Deferred revenue consists of billings or cash received for services in advance of revenue recognition and is recognized as revenue when all of the Company’s revenue recognition criteria are met. The portion of deferred revenue that is anticipated to be recognized as revenue during the succeeding twelve-month period is recorded as deferred revenue, current and the remaining portion is recorded as deferred revenue, non-current. The Company’s contract liabilities are classified as deferred revenue upon the right to invoice or when payments have been received for undelivered products or services. Revenue Recognition The Company accounts for revenue in accordance with ASC Topic 606, Revenue From Contracts With Customers (“ASC 606”) for all periods presented. The core principle of ASC 606 is to recognize revenue for the transfer of promised goods or services to customers in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. This principle is achieved by applying the following five-step approach: Identification of the Contract, or Contracts, with a Customer. A contract with a customer exists when (1) the Company enters into an enforceable contract with a customer that defines each party’s rights regarding the goods or services to be transferred and identifies the payment terms related to these goods or services, (2) the contract has commercial substance and (3) the Company determines that collection of substantially all consideration for goods or services that are transferred is probable based on the customer’s intent and ability to pay the promised consideration. The Company applies judgment in determining the customer’s ability and intention to pay, which is based on a variety of factors, including the customer’s historical payment experience or, in the case of a new customer, published credit and financial information pertaining to the customer. Identification of the Performance Obligations in the Contract. Performance obligations promised in a contract are identified based on the goods or services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the goods or services either on their own or together with other resources that are readily available from third parties or from the Company, and are distinct in the context of the contract, whereby the transfer of the goods or services is separately identifiable from other promises in the contract. To the extent a contract includes multiple promised goods or services, the Company applies judgment to determine whether promised goods or services are capable of being distinct and distinct in the context of the contract. If these criteria are not met, the promised goods or services are accounted for as a combined performance obligation. Determination of the Transaction Price. The transaction price is determined based on the consideration to which the Company will be entitled in exchange for transferring goods or services to the customer, net of sales taxes or value-added taxes. If the transaction price includes variable consideration, the Company includes an estimate of the amount it expects to receive if it is probable that a significant reversal of cumulative revenue recognized will not occur. Usage-based fees earned in exchange for the use of the Company’s software licenses and subscription services are subject to the usage-based royalty and series guidance variable consideration estimation exceptions, respectively. Allocation of the Transaction Price to the Performance Obligations in the Contract. Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation based on a relative standalone selling price (“SSP”). When appropriate, the Company determines SSP based on the price at which the performance obligation has previously been sold through past transactions, taking into account internally approved pricing guidelines related to the performance obligations. When the SSP of a license or subscription and bundled maintenance and support services is highly variable and the contract also includes additional performance obligations with observable SSP, the Company first allocates the transaction price to the performance obligations with established SSPs and then applies the residual approach to allocate the remaining transaction price to the license or subscription and bundled maintenance and support services. If applying the residual approach results in zero or very little consideration being allocated to the combined performance obligation, or to a bundle of goods or services, the Company will consider all reasonably available data to determine an appropriate allocation of the transaction price. If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Recognition of Revenue when, or as, Performance Obligations are Satisfied . The Company satisfies substantially all of its performance obligations over time, as discussed in further detail below. Revenue is recognized at the time the related performance obligation is satisfied with the transfer of a promised good or service to a customer over time. Subscription Revenue Subscription revenue is primarily comprised of term licenses, stand-ready COE support services, trials of our applications, and software-as-a-service (“SaaS”) offerings. Licenses represent a contractual right for a customer to take possession of the software and it is feasible for the customer to host the software independently. SaaS represents a right for a customer to access the software through the Company’s cloud environment and the customer does not have the right to take possession of the software. Subscriptions also include our maintenance and support services that comprised of critical and continuous updates to the software that are integral to maintaining the intended utility of the software over the contractual term. The Company’s software and maintenance and support services are highly interdependent and interrelated and represent a single distinct performance obligation within the context of the contract satisfied over time. Determining whether the software license and maintenance and support services are considered distinct performance obligations that should be accounted for separately or as one combined performance obligation may require significant judgment. In reaching its conclusion, the Company considered the nature of its promise to provide the customer real time analytics and machine learning algorithms that require regular re-training to maintain and improve prediction accuracy. The Company fulfills this promise by providing real time data feeds to the machine learning model and by providing regular tuning, optimization and critical updates to the constantly changing type system. Accordingly, the Company has determined that the software license and maintenance and support services fulfill a single promise to the customer under the contract. The Company’s subscriptions are generally offered under renewable, multi-year, fixed fee contracts where payments are typically due annually in advance. A time-elapsed output method is used to measure progress because the nature of the promise is a stand-ready service. The Company also offers premium stand-ready C3 Center of Excellence (“COE”) support services, hosting services and trial services, which are distinct performance obligations. A description of the Company’s offerings are as follows: • C3 AI Suite is a comprehensive suite that allows for the design, deployment, and operation of AI, predictive analytics, and applications at enterprise scale. The C3 AI Suite provides data scientists and application developers robust advantages for rapid application and analytics development and deployment. Customers primarily pay for the C3 AI Suite via fixed annual fees based on the number of development users allowed to access the C3 AI Suite. The AI Suite offering is primarily a term subscription but at times has been sold as a perpetual license and generates additional runtime subscription fees, a type of consumption or usage-based revenue based on compute and storage resources required to run the C3 AI Suite. • C3 AI Applications are production applications that address a wide range of predictive analytics use cases. C3 AI Applications are industry-tested and proven enterprise-grade applications built on a cohesive suite architecture that is designed to integrate and process highly dynamic data sets from sensor networks and enterprise and extraprise information systems, and enable advanced machine learning capabilities. C3 AI Applications sold without the C3 AI Suite can be in the form of term or perpetual licenses or subscriptions and earn revenue through a fixed fee and/or usage-based royalties. • C3 Maintenance and Support Services are provided for the C3 AI Suite and the C3 AI Applications that are selected by the customer. This support includes standard monitoring, performance monitoring, database maintenance, security monitoring, upgrading, backup and restore, patching, etc. provided by the Company. The Company continuously provides updates that are critical to the continued utility of the software. • COE Support Services. COE Support Services provide premium development services and support by an available pool of resources. The purpose of the COE is to allow the customer to utilize, extend or modify C3 applications and to develop its own applications on the C3 AI Suite. To facilitate customer’s efforts, C3 provides the following COE Support Services on C3 AI Suite and C3 applications to customer personnel during the subscription term of COE: (1) support and guidance on C3 AI overall software application architecture; (2) data integration, data science, and application development support on the C3 AI Suite; (3) training on the C3 AI Suite and C3 AI Applications to the customer project team members; and (4) support to help address any developmental issues faced by the customer. COE Support Services are generally offered under renewable, multi-year, fixed fee contracts whereby payments are primarily due annually in advance and in most cases are co-terminous with the C3 AI Suite subscription term. COE Support Services represent a stand-ready performance obligation comprised of a series of distinct days of service that is satisfied and recognized in revenue ratably over the term of the COE agreement. Revenue for COE Support Services is included within subscription revenue in the consolidated statements of operations. • Trials. Trial projects typically consist of several phases including project kickoff, design, data integration, configuration, validation and final demonstration. These trials are typically fixed-price eight to 16-week production pilots during which the Company works with customers to define a specific business problem or use case and address the use case using AI-based predictive analytics. During the trial, the Company integrates data, configures machine learning algorithms supporting the use case, and configures a user interface to present the resulting insights. At the end of a trial, the Company demonstrates a working application that shows the utility, benefit, and economic value to be gained from a production deployment of big data, analytics, and machine learning applications. These paid trials are solely meant to demonstrate the feasibility of the Company’s offering to the customer and provide them with a level of confidence to encourage them to enter into a large, multi-year arrangement with the Company. Trial revenue is recognized over time during the production pilot period. • Hosting Services. For certain customers, the Company provides access to the C3 AI Suite and/or C3 AI Applications in the Company’s cloud environment. The customer consumes and receives benefit throughout the hosting period from the entity’s performance of hosting and providing access to the hosted software, which the customer would otherwise have to undertake itself or obtain another party to do. The Company recognizes hosting services over time based on the consumption patterns of the customers. Customers who choose to install the C3 AI Suite and/or C3 AI Applications in their own cloud environments do not subscribe to the Company’s hosting services. Hosting services are generally offered as part of the subscription for C3 AI Suite and/or C3 Application arrangements and the amount of revenue recognized on a monthly basis varies based on actual consumption by the customer. Professional Services The Company’s professional services primarily include implementation services, training and prioritized engineering services. The Company offers a complete range of professional service support both onsite and remotely, including training, application design, project management, system design, data modeling, data integration, application design, development support, data science, and application and AI Suite administration support. Professional services fees are based on the level of effort required to perform such tasks and are typically a fixed-fee engagement with a duration of less than 12 months. Contract balances The Company typically invoices customers for subscription fees in annual increments upon execution of the initial contract or subsequent renewal, payable within 30 to 60 days, and providing customers access to C3 AI Suite and/or C3 AI Applications. Monthly usage-based runtime and hosting charges are billed as they are delivered. Certain government contracts are cancellable during the subscription term depending on the future fiscal funding available to the contract. The Company has not experienced any cancellation due to the funding constraint related to such contracts. The timing of revenue recognition may differ from the timing of invoicing to customers. Accounts receivable are recorded at the invoiced amount, net of an allowance for doubtful accounts. A receivable is recognized in the period the Company delivers goods or provides services, or when the Company’s right to consideration is unconditional, whichever is earlier. In situations where revenue recognition occurs before invoicing, an unbilled receivable is recorded. While the timing of revenue recognition usually differs from the timing of payment, the Company has determined the contracts generally do not include a significant financing component, because the period between when the Company transfers its software and services to a customer and when the customer pays for the software and service is one year or less. The primary purpose of the invoicing terms is

Revenue

Revenue	12 Months Ended
	Apr. 30, 2021
Revenue from Contract with Customer [Abstract]
Revenue	Revenue Disaggregation of Revenue The following table presents revenue by geographical region (in thousands): Fiscal Year Ended April 30, 2021 2020 2019 North America (1) $ 119,795 $ 121,485 $ 61,314 Europe, the Middle East and Africa (1) 56,030 33,086 27,629 Asia Pacific (1) 5,992 2,095 2,662 Rest of World (1) 1,400 — — Total revenue $ 183,217 $ 156,666 $ 91,605 __________________ (1) The United States comprised 65%, 78% and 66% of the Company’s revenue in the fiscal years ended April 30, 2021, 2020 and 2019, respectively. France comprised 12%, 10.5% and 15% of the Company’s revenue in the fiscal years ended April 30, 2021, 2020 and 2019, respectively. The Netherlands comprised 12% in the fiscal year ended April 30, 2021. No other country comprised 10% or greater of the Company’s revenue for each of the fiscal years ended April 30, 2021, 2020 and 2019. Deferred Revenue The following table reflects the deferred revenue balance (in thousands): As of April, 30 2021 2020 Deferred revenue, current $ 72,263 $ 53,537 Deferred revenue, non-current 2,964 6,758 Total deferred revenue $ 75,227 $ 60,295 Significant changes in the deferred revenue balances during the fiscal years ended April 30, 2021 and 2020 were as follows (in thousands): Deferred Revenue May 1, 2019 $ 91,225 Performance obligations satisfied during the period that were included in the deferred revenue balance at the beginning of the year (83,093) Increases due to invoicing prior to satisfaction of performance obligations 52,163 April 30, 2020 60,295 Performance obligations satisfied during the period that were included in the deferred revenue balance at the beginning of the year (57,542) Increases due to invoicing prior to satisfaction of performance obligations 72,474 April 30, 2021 $ 75,227 Remaining Performance Obligation Remaining performance obligations are committed and represent non-cancellable contracted revenue that has not yet been recognized and will be recognized as revenue in future periods. Some contracts allow customers to cancel the contracts without a significant penalty, and the cancellable amount of contract value is not included in the remaining performance obligations. The Company excludes amounts related to performance obligations and usage-based royalties that are billed and recognized as they are delivered. This primarily consists of monthly usage-based runtime and hosting charges arising in some revenue contracts. Revenue expected to be recognized from remaining performance obligations was approximately $293.8 million as of April 30, 2021 of which $145.2 million is expected to be recognized over the next 12 months and the remainder thereafter. Costs to Obtain or Fulfill a Contract As of April 30, 2021 and 2020, the amount of costs to obtain and fulfill a contract included in prepaid expenses and other current assets was $3.2 million and $0.9 million, respectively. The amount of costs to obtain and fulfill a contract included in other assets, non-current as of April 30, 2021 and 2020 was $9.1 million and $1.2 million, respectively. Expenses recognized for costs to obtain and fulfill a contract for the years ended April 30, 2021, 2020 and 2019 was $1.2 million, $1.0 million and $1.1 million, respectively, and is included in sales and marketing expenses on the consolidated statements of operations. There were no impairments related to costs to obtain or fulfill a contract for the fiscal years ended April 30, 2021, 2020 and 2019, respectively. Customer Concentration

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Apr. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value MeasurementsThe Company’s financial instruments consist primarily of cash equivalents, restricted cash, available-for-sale marketable securities, accounts receivable, non-marketable equity securities, and accounts payable. Cash and cash equivalents and available-for-sale marketable securities are reported at their respective fair values on the consolidated balance sheets. Non-marketable equity securities are reported at cost less impairment. The remaining financial instruments are reported on the consolidated balance sheets at amounts that approximate current fair values. The following table summarizes the types of assets measured at fair value on a recurring basis by level within the fair value hierarchy (in thousands): As of April 30, 2021 As of April 30, 2020 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 43,401 $ — $ — $ 43,401 $ 10,260 $ — $ — $ 10,260 Available-for-sale marketable securities: U.S. treasury securities — 57,998 — 57,998 — 11,500 — 11,500 Certificates of deposit — 422,978 — 422,978 — 28,477 — 28,477 U.S. government agencies securities — — — — — 10,074 — 10,074 Commercial paper — 494,676 — 494,676 — 94,397 — 94,397 Corporate debt securities — 2,368 — 2,368 — 68,425 — 68,425 Total cash equivalents and available-for-sale marketable securities $ 43,401 $ 978,020 $ — $ 1,021,421 $ 10,260 $ 212,873 $ — $ 223,133 The estimated fair value of securities classified as Level 2 financial instruments was determined based on third-party pricing services. The pricing services utilize industry standard valuation models, including both income- and market-based approaches, for which all significant inputs are observable, either directly or indirectly, to estimate fair value. Inputs used for fair value measurement categorized as Level 2 include benchmark yields, reported trades, broker or dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data including market research publications.

Investments

Investments	12 Months Ended
	Apr. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Investments	Investments Cash Equivalents and Available-for-Sale Marketable Securities The following table summarizes the Company’s cash equivalents and available-for-sale marketable securities (in thousands): As of April 30, 2021 As of April 30, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Cash equivalents: Money market funds $ 43,401 $ — $ — $ 43,401 $ 10,260 $ — $ — $ 10,260 Available-for-sale marketable securities: U.S. treasury securities 57,993 5 — 57,998 11,489 11 — 11,500 Certificates of deposit 422,952 32 (6) 422,978 28,476 1 — 28,477 U.S. government agencies securities — — — — 9,995 79 — 10,074 Commercial paper 494,625 64 (13) 494,676 94,242 155 — 94,397 Corporate debt securities 2,369 — (1) 2,368 68,246 179 — 68,425 Total cash equivalents and available-for-sale marketable securities $ 1,021,340 $ 101 $ (20) $ 1,021,421 $ 222,708 $ 425 $ — $ 223,133 The following table summarizes the Company’s available-for-sale marketable securities by contractual maturity (in thousands): As of April 30, 2021 As of April 30, 2020 Amortized Cost Fair Value Amortized Cost Fair Value Within one year $ 977,939 $ 978,020 $ 212,449 $ 212,873 After one year through five years — — — — Total $ 977,939 $ 978,020 $ 212,449 $ 212,873 As of April 30, 2021, the Company had 8 investment positions that were in an unrealized loss position. As of April 30, 2020, the Company had 16 investment positions in an unrealized loss position. No investments were other-than-temporary impaired as of April 30, 2021, 2020 or 2019. The Company considers factors such as the duration, the magnitude and the reason for the decline in value, the potential recovery period, creditworthiness of the issuers of the securities and its intent to sell. For marketable securities, it also considers whether (i) it is more likely than not that the Company will be required to sell the debt securities before recovery of their amortized cost basis, and (ii) the amortized cost basis cannot be recovered as a result of credit losses. No significant facts or circumstances have arisen to indicate that there has been any significant deterioration in the creditworthiness of the issuers of the securities held by the Company. Based on the Company’s review of these securities, including the assessment of the duration and severity of the unrealized losses and the Company’s ability and intent to hold the investments until maturity, there were no other-than-temporary impairments for these marketable securities at April 30, 2021. Non-Marketable Equity Securities As of April 30, 2021, the Company had no non-marketable equity securities. As of April 30, 2020, non-marketable equity securities carried at cost of $0.7 million were recorded in long-term investments. The Company recognized an impairment on the non-marketable equity securities of $1.0 million, included in other income (expense), net, on the consolidated statements of operations, during the fiscal year ended April 30, 2020. In November 2020, the Company sold its non-marketable equity security for $0.7 million.

Balance Sheet Details

Balance Sheet Details	12 Months Ended
	Apr. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Balance Sheet Details	Balance Sheet Details Property and Equipment, Net Property and equipment consisted of the following at April 30, 2021 and 2020 (in thousands): Useful Life As of April 30, (in months) 2021 2020 Leasehold improvements * $ 8,658 $ 8,215 Computer equipment 36 2,539 2,028 Office furniture and equipment 60 339 339 Total property and equipment 11,536 10,582 Less accumulated depreciation (5,403) (1,859) Property and equipment, net $ 6,133 $ 8,723 __________________ * Leasehold improvements are amortized over the shorter of the estimated useful lives of the improvements or the remaining lease term. Depreciation and amortization expense related to property and equipment was $4.0 million, $1.2 million, and $0.5 million for the fiscal years ended April 30, 2021, 2020 and 2019. Accrued Compensation and Employee Benefits Accrued compensation and employee benefits consisted of the following at April 30, 2021 and 2020 (in thousands): As of April 30, 2021 2020 Accrued bonus $ 12,216 $ 8,356 Accrued vacation 3,935 2,823 Accrued payroll taxes and benefits 3,405 1,397 Accrued commission 1,863 515 Accrued salaries 410 602 Accrued compensation and employee benefits $ 21,829 $ 13,693 Accrued and Other Current Liabilities Accrued and other current liabilities consisted of the following at April 30, 2021 and 2020 (in thousands): As of April 30, 2021 2020 Liability for common stock exercised prior to vesting $ 5,331 $ 2,243 Accrued general expenses 3,588 1,466 Operating lease liabilities, current 3,894 3,533 Other 5,505 1,841 Accrued and other current liabilities $ 18,318 $ 9,083 Refer to Note 6. Leases for more information regarding the Company’s leases. Cares Act Loan On May 1, 2020, the Company entered into Paycheck Protection Program (“PPP”) Promissory Note and Agreement with Bank of America, pursuant to which the Company received loan proceeds of $6.3 million (the “PPP Loan”). The PPP Loan was made under, and was subject to the terms and conditions of, the PPP which was established under the CARES Act and is administered by the U.S. Small Business Administration. The term of the PPP Loan was two years with a maturity date of May 1, 2022 and contains a favorable fixed annual interest rate of 1.00%. Payments of principal and interest on the PPP Loan were deferred for the first six months of the term of the PPP Loan until November 1, 2020. Principal and interest were payable monthly and could be prepaid by the Company at any time prior to maturity with no prepayment penalties. On August 18, 2020, the Company repaid in full the PPP loan outstanding, including accrued interest of $0.1 million, in the amount of $6.4 million.

Leases

Leases	12 Months Ended
	Apr. 30, 2021
Leases [Abstract]
Leases	Leases The Company’s operating lease liabilities at April 30, 2021 and 2020 are primarily comprised of future payments related to the Company’s various operating lease agreements for office space. The components of total lease costs, including variable lease costs, for the fiscal years ended April 30, 2021 and 2020 were as follows (in thousands): Fiscal Year Ended April 30, Lease Costs 2021 2020 Operating lease costs $ 3,793 $ 3,825 Short term lease costs 1,568 1,324 Variable lease costs 1,589 1,542 Total lease costs $ 6,950 $ 6,691 Variable lease costs are primarily related to payments made to the Company’s landlords for common area maintenance, property taxes, insurance, and other operating expenses. Short-term lease costs primarily represents payments related to marketing arrangements that contain embedded short-term leases of billboards. Supplemental cash flow information related to leases was as follows (in thousands): Fiscal Year Ended April 30, 2021 2020 Cash paid for amounts included in the measurement of operating lease liabilities: Operating cash flows from operating leases $ 4,031 $ 3,946 The following table presents the lease balances within the consolidated balance sheet, weighted-average remaining lease term, and weighted-average discount rates related to the Company’s operating leases (in thousands): As of April 30, Operating leases 2021 2020 Right-of-use assets Other assets, non-current $ 5,094 $ 8,409 Lease liabilities, current Other current liabilities 3,894 3,533 Lease liabilities, non-current Other long-term liabilities 1,735 5,647 Total operating lease liabilities $ 5,629 $ 9,180 As of April 30, Operating leases 2021 2020 Weighted average remaining lease term (in months) 17.0 28.9 Weighted average discount rate 7.3 % 7.3 % Future minimum payments under lease obligations at April 30, 2021 were as follows (in thousands): As of April 30, 2021 Fiscal 2022 $ 4,152 Fiscal 2023 1,756 Fiscal 2024 — Fiscal 2025 — Fiscal 2026 and thereafter — Total future minimum lease payments 5,908 Less: Imputed interest (279) Total operating lease liabilities $ 5,629

Commitment and Contingencies

Commitment and Contingencies	12 Months Ended
	Apr. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Noncancelable Commitments The Company entered into a noncancelable arrangement with a web-hosting services provider in November 2019. Under the arrangement, the Company committed to spend an aggregate of at least $30.0 million between November 2019 and November 2022, with a minimum amount of $10.0 million in each of the three years, on services with this vendor. The Company has incurred costs totaling $14.3 million, $4.4 million and $3.4 million under the arrangement during the fiscal years ended April 30, 2021, 2020 and 2019, respectively. C3.ai DTI Grants In February 2020, the Company entered into an agreement establishing the C3.ai DTI, a program established to attract many of the world’s leading research institutions to join in a coordinated and innovative effort to advance the digital transformation of business, government, and society. As part of the agreement, the Company has agreed to issue grants to C3.ai DTI, which are subject to compliance with certain obligations. The grants shall be paid by the Company over five years in the form of cash, publicly traded securities, or other property of equivalent net value. As of April 30, 2021 and 2020, the total potential remaining contributions are $43.1 million and $45.8 million, respectively. The future grant payments are conditional in nature and subject to execution of the program in line with specific requirements. Legal Proceedings The Company is involved in various legal proceedings and periodically receives claims arising in the ordinary course of business. In the Company’s opinion, resolution of these matters is not expected to have a material adverse impact on its consolidated statement of operations, cash flows, or balance sheet. Blattman et al. v. Siebel et al., 15-cv-00530 (D. Del.) On October 28, 2014, Eric Blattman and other former unitholders of E2.0 LLC (“E2.0”) filed suit in federal court against Thomas M. Siebel and David Schmaier, alleging violation of Section 10(b) of the Securities Exchange Act of 1934 and common law fraud based on alleged misrepresentations made during negotiations leading up to an April 30, 2012 merger between E2.0 and the Company. Plaintiffs thereafter amended their complaint to add the Company as a defendant, and to add breach of contract claims based on alleged violations of certain earn-out and indemnification provisions in the parties’ merger agreement. A bench trial was held in February 2019, and in a January 29, 2020 opinion the court ruled in favor of defendants the Company, Siebel and Schmaier on all claims. The court also awarded defendants their reasonable attorneys’ fees and costs in defending the action. In February 2020, Plaintiffs appealed only the portion of the district court’s ruling related to the alleged breach of contract indemnification claim to the Third Circuit Court of Appeals, seeking damages of approximately $2.5 million. Plaintiffs also seek to overturn the district court’s ruling that defendants are entitled to attorneys’ fees, and contend that plaintiffs instead should recover their attorneys’ fees. No appeal was taken with respect to the ruling in Defendants’ favor on the remaining claims.

Redeemable Convertible Preferre

Redeemable Convertible Preferred Stock and Redeemable Convertible A-1 Common Stock	12 Months Ended
	Apr. 30, 2021
Temporary Equity Disclosure [Abstract]
Redeemable Convertible Preferred Stock and Redeemable Convertible A-1 Common Stock	Redeemable Convertible Preferred Stock and Redeemable Convertible A-1 Common Stock Upon completion of the IPO, all 33,628,776 shares of the Company’s outstanding redeemable convertible preferred stock, except the Series A* preferred stock, automatically converted into an equivalent number of shares of Class A common stock on a one-to-one basis and all 3,499,992 shares of the Company’s outstanding redeemable convertible Series A* preferred stock automatically converted into an equivalent number of shares of Class B common stock on a one-to-one basis. The carrying value of $399.8 million of all classes of the Company’s outstanding redeemable convertible preferred stock was reclassified into stockholders’ equity. Additionally, all 6,666,665 shares of the Company’s outstanding redeemable convertible Class A-1 common stock automatically converted into an equivalent number of shares of Class A common stock on a one-to-one basis and their carrying value of $18.8 million was reclassified into stockholders’ equity. As of April 30, 2021, there were no shares of redeemable convertible preferred stock issued and outstanding. See Note 1. Summary of Business and Significant Accounting Policies for more information. Redeemable convertible preferred stock outstanding as of April 30, 2020, respectively, consisted of the following (in thousands, except share amounts): Shares Liquidation Carrying Authorized Outstanding Series A* 21,000,000 3,499,992 $ 7,000 $ 7,000 Series B* 27,360,000 4,559,999 9,120 9,120 Series B-1A* 14,583,945 2,430,635 15,853 15,717 Series B-1B* 556,680 92,769 1,210 1,210 Series C* 16,678,511 2,779,738 19,014 18,980 Series D 73,670,824 12,278,422 103,662 103,531 Series E 3,240,060 540,003 11,803 11,756 Series F 42,701,251 5,399,581 81,322 81,157 Series G 23,392,520 3,893,701 77,194 76,900 Series H 9,923,588 1,653,928 50,000 49,836 Total convertible preferred stock 233,107,379 37,128,768 $ 376,178 $ 375,207 Series G Preferred Stock From February through April 2019, the Company issued 2,610,376 shares of Series G Preferred Stock at $19.8252 per share for total cash proceeds of $51.5 million, net of issuance cost of $0.3 million. In June 2019, the Company issued 1,283,325 shares of Series G Preferred Stock at $19.8252 per share for total cash proceeds of $25.4 million, net of issuance costs of less than $0.1 million. Series H Preferred Stock In August 2019, the Company issued 1,653,928 shares of Series H Preferred Stock at $30.2310 per share for total cash proceeds of $49.8 million, net of issuance cost of $0.2 million. The holders of Series D, Series E, Series F, Series G, and Series H preferred stock receive senior liquidation preferences that equal to the original issuance price of Series D, Series E, Series F, Series G, and Series H preferred stock respectively, plus all declared and unpaid dividends on a pari passu basis. Series A*, Series B*, Series B-1A*, and Series B-1B* are referred herein as Early Preferred. Early Preferred, Series C*, Series D, Series E, Series F, Series G, and Series H are referred herein as Series Preferred. Significant rights and preferences of the above redeemable convertible preferred stock prior to its conversion into Class A common stock were as follows: Conversion Upon an IPO where the per share offering price multiplied by the outstanding shares of the Company was not less than $50.0 million and the gross cash proceeds to the Company were at least $30.0 million (a “Qualified Public Offering”), or upon the affirmative election of the holders of a majority of outstanding shares, Series A* Preferred were automatically converted into Class B common stock. All remaining Early Preferred and Series C* preferred stock automatically converted into shares of Class A common stock. Upon an IPO where the per share offering price was not less than $8.4426 and the gross cash proceeds to the Company were at least $75.0 million, or upon the affirmative election of the holders of a majority of outstanding shares, Series D, E, F, G and H preferred stock were automatically converted into shares of Class A common stock. Upon the affirmative vote or written consent of a majority of the shares of common stock and preferred stock voting together as a single class on an as-if-converted to Class A common stock basis, or upon the closing of a qualified IPO, all shares Class A-1 common stock were to be converted into fully paid and nonassessable shares of Class A common stock on a one-to-one basis. The initial conversion price for the redeemable convertible preferred stock was $1.998 for Series A* preferred stock, $1.998 for Series B* preferred stock, $6.522 for the Series B-1A* preferred stock, $13.038 for Series B-1B* preferred stock, $6.84 for Series C* preferred stock, $8.442 for Series D preferred stock, $21.858 for Series E preferred stock, $19.608 for the Series F preferred stock, $19.8252 for Series G preferred stock, and $30.231 for Series H preferred stock. Protective Provisions In connection with a public offering, in which the price per share of the Company’s common stock was less than $29.4102 (adjusted for stock splits, stock dividends, and the like), or if any shares of Series F, Series G, or Series H Preferred Stock, or collectively the Ratchet Preferred, converted to Class A common stock outside of a public offering and any company equity securities were listed with volume-weighted average closing sale price of less than $29.4102 (adjusted for stock splits, stock dividends, and the like), immediately prior to the completion of the public offering or conversion, the Ratchet Preferred conversion price would have been adjusted so that, the product of (1) the number of shares of common stock issuable upon conversion of such share of Ratchet Preferred at such adjusted Ratchet Preferred conversion price multiplied by (2) the public offering price, equal $29.4102 (adjusted for stock splits, stock dividends, and the like). If the Company issued or sold additional common stock (outside of stock split, stock dividends, and the like), at a price less than the then effective Ratchet Preferred conversion price or Series E preferred conversion price, the then existing Ratchet Preferred conversion price or Series E preferred conversion price would be reduced by a fraction with the numerator being (1) the number of shares of common stock deemed outstanding, as defined, immediately prior to such issue or sale, plus (2) the number of shares of common stock that the aggregate consideration received or deemed received by the Company for the total number of additional shares of common stock so issued would purchase at such then-existing Series E Preferred Conversion Price or Ratchet Preferred Conversion Price, as applicable, and the denominator being the number of shares of common stock deemed outstanding immediately prior to such issue or sale plus the total number of additional shares of common stock so issued. No adjustment would have been made to the Series E or Ratchet Preferred conversion price in an amount less than 1% of such conversion price, but would otherwise be included in any subsequent adjustment. Through the date the Ratchet Preferred stock was converted, there were no adjustments made pursuant to these provisions. Liquidation Rights If a merger or acquisition, change of control, sale of the Company, liquidation or winding of the business, the holders of Series D, Series E, Series F, Series G, and Series H shall be entitled to receive, in preference of Early Preferred, Series C* Preferred Stock, and common stocks, an amount per share of $8.4426, $21.8574, $19.6068, $19.8252, and $30.231 respectively, plus any declared but unpaid dividends prior to any other distributions, on a pari passu basis. After the distribution to Series D, Series E, Series F, and Series G, holders of Series C* shall be entitled to receive, in preference of Early Preferred and common stocks, an amount of $6.84 per share, plus any declared but unpaid dividends. After the distribution to Series G, Series F, Series E, Series D, and Series C*, the holders of Early Preferred are entitled to receive an amount of $1.998, $1.998, $6.522, and $13.038 per share respectively, plus any declared but unpaid dividends, on a pari passu basis. After the distribution to Series Preferred, the holders of Class A-1 common stock, in preference of Class A and Class B common stock, shall be entitled to receive an amount of $2.82 per share. After the distribution to Series Preferred and Class A-1 common stock set forth above, the remaining assets of the Company shall be distributed ratably to the holders of all common stock and preferred stock on an as-if-converted to Class A common basis or Class B common basis, as applicable. In the event that, after distributions set forth above, the holders of Series D, Series F, Series G, and Series H Preferred Stock have not received an amount per share of $12.6642, $29.4102, $29.7378, and $45.3468 respectively, the holders of Series D, Series F, Series G, and Series H Preferred Stock shall be entitled to receive additional amounts per share until they receive an amount per share of $12.6642, $29.4102, $29.7378, and $45.3468 respectively, by (1) reducing common stock, Early Preferred, Series C* and Series E ratably in proportion to their full amounts; (2) reducing Class A-1 common ratably in proportion to their full amounts; (3) reducing Early Preferred ratably in proportion to their full amounts; (4) reducing Series C* ratably in proportion to their full amounts; and (5) reducing Series E ratably in proportion to their full amounts. Redeemable Convertible Preferred Stock As the shares of redeemable convertible preferred stock were redeemable upon a deemed liquidation event as discussed in the Liquidation Rights, and because the Company determined that such a deemed liquidation would be outside of its control, the redeemable convertible preferred stock were recorded at issuance date fair value outside of stockholders’ equity (deficit) in the Redeemable Convertible Preferred Stock section of the consolidated balance sheet. As it was uncertain as to when a redemption event may occur, if ever, the carrying amounts of the redeemable convertible preferred stock are not accreted to their redemption value until such event were to become probable. Redeemable Convertible Class A-1 Common Stock Redeemable convertible Class A-1 common stock outstanding as of April 30, 2020, consisted of the following (in thousands, except share amounts): As of April 30, 2020 Shares Liquidation Carrying Authorized Outstanding Class A-1 common stock 6,666,667 6,666,665 $ 18,800 $ 18,800 As noted above the Class A-1 common stock has similar rights and privileges upon a liquidation event as the redeemable convertible preferred stock prior to its conversion into Class A common stock. Dividends Each share of preferred stock and common stock shall have the right to receive cash dividends, when and if declared by the board of directors. Prior and in preference to dividends on common stock, the holders of Series Preferred stock are entitled to receive non-cumulative cash dividends, at a rate of 6% of the original issue price of $1.998, $1.998, $6.522, $13.038, $6.84, $8.4426, $21.8574, $19.6068, $19.8252, and $30.231 per share for Series A*, B*, B-1A*, B-1B*, C*, D, E, F, G, and H Preferred Stock, respectively, as adjusted for stock dividends, combinations, splits, recapitalizations and the like, per annum, out of any assets at the time legally available therefor, when, as and if declared by the board of directors. If dividends are paid on any share of common stock, the Company shall pay equivalent additional dividend on all outstanding shares of Series Preferred stock on an as-if-converted to common stock basis. No dividends on preferred stock or common stock have been declared by the board of directors as of April 30, 2021 and 2020 and 2019. Voting Rights In the event of a qualified public offering in which Series A* preferred stock converts to Class B common stock, Class B common stock will have full voting rights equivalent to 50 multiplied by the number of shares held. Each holder of Series B*, B-1A*, B-1B*, C*, D, E, F, G, and H preferred stock, Class A common stock and Class A-1 common stock that is not a holder of Series A* has full voting rights equivalent to the number of shares held. All voting securities shall vote together and not as a separate class.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Apr. 30, 2021
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity Preferred Stock The Company has authorized the issuance of 200,000,000 shares of undesignated preferred stock with a par value of $0.001 per share with rights and preferences, including voting rights, designated from time to time by the board of directors. As of April 30, 2021 there were no shares of preferred stock issued or outstanding. Common Stock The Company has authorized the issuance of 1,000,000,000 shares of Class A common stock and 3,500,000 shares of Class B common stock. The shares of Class A common stock and Class B common stock are identical, except with respect to voting, conversion, and transfer rights. Each share of Class A common stock is entitled to one vote. Each share of Class B common stock is entitled to 50 votes. Class A and Class B common stock have a par value of $0.001 per share and are referred to as common stock throughout the notes to the consolidated financial statements, unless otherwise noted. Holders of common stock are entitled to receive any dividends as may be declared from time to time by the board of directors. Shares of Class B common stock may be converted to Class A common stock at any time at the option of the stockholder. Each share of Class B common stock will be automatically converted into one share of Class A common stock upon the earliest of the following: (i) the date that is six months following the death or incapacity of Mr. Siebel; (ii) the date that is six months following the date that Mr. Siebel is no longer providing services to the Company as an officer, employee, director, or consultant; (iii) December 11, 2040, which is the twentieth anniversary of the completion of the IPO; or (iv) the date specified by the holders of a majority of the then outstanding shares of Class B common stock, voting as a separate class. Future transfers by holders of Class B common stock will generally result in those shares converting to Class A common stock. Common Stock Subject to Repurchase Under the Company’s Amended and Restated 2012 Equity Incentive Plan (the “2012 Incentive Plan”), optionholders are allowed to exercise stock options to purchase Class A common stock prior to vesting. The Company has the right to repurchase at the original purchase price any unvested but outstanding common shares upon termination of service of the optionholder. The consideration received for an early exercise of a stock option is considered to be a deposit of the exercise price and the related amount is recorded as a liability. The net proceeds during the fiscal years ended April 30, 2021, 2020 and 2019 were $6.0 million, $1.9 million and $1.1 million, respectively. The liability is reclassified into equity on a ratable basis as the stock options vest. The Company has recorded a current liability of $5.3 million and $2.2 million as of April 30, 2021 and 2020, respectively. Unvested Class A common stock of 1,091,306 and 663,763 shares as of April 30, 2021 and 2020, respectively were subject to such repurchase right and are legally issued and outstanding as of each period presented. See Note 10. Stock-Based Compensation for more information. Third-Party Stock Transactions In October 2019, the Company announced and completed a tender offer to repurchase Class A common stock of 163,685 shares and vested stock options of 811,189 shares from employees and officers at a price of $30.2310 per share. The repurchase transactions for vested stock options were conducted as net cash settlements where the holders of vested stock options received the difference between the repurchase price and the respective option exercise price. The total net transaction price was $28.5 million. The Company recognized $24.9 million in compensation expense related to the shares repurchased for the difference between the repurchase price and the fair value of the Company’s common stock at the time of repurchase.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Apr. 30, 2021
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation On June 29, 2012, the Company adopted the 2012 Incentive Plan. The 2012 Incentive Plan provided for the grant of stock-based awards to employees, non-employee directors, and other service providers of the Company. The 2012 Incentive Plan was terminated in December 2020 in connection with the IPO but continues to govern the terms of outstanding awards that were granted prior to the termination of the 2012 Incentive Plan. No further equity awards will be granted under the 2012 Incentive Plan. With the establishment of the 2020 Equity Incentive Plan (the “2020 Incentive Plan”) as further discussed below, upon the expiration, forfeiture, cancellation, or reacquisition of any shares of Class A common stock underlying outstanding stock-based awards granted under the 2012 Incentive Plan, an equal number of shares of Class A common stock will become available for grant under the 2020 Plan (the “Returning Shares”). On November 27, 2020, the Company’s board of directors adopted, and its stockholders approved, the 2020 Incentive Plan, which became effective in connection with the IPO. The 2020 Incentive Plan provides for the grant of incentive stock options, nonstatutory stock options, stock appreciation rights, restricted stock awards, RSU awards, performance awards and other equity awards. A total of 67,535,205 shares of Class A common stock were initially reserved for issuance under the 2020 Incentive Plan, including any Returning Shares that become available from time to time. The number of shares of Class A common stock reserved for issuance under the 2020 Incentive Plan is subject to automatic evergreen increases annually through (and including) May 1, 2030 pursuant to the terms of the 2020 Incentive Plan. On November 27, 2020, the Company’s board of directors also adopted, and its stockholders also approved, the 2020 Employee Stock Purchase Plan (the “2020 ESPP”), which became effective immediately prior to the IPO. The 2020 ESPP authorizes the issuance of shares of Class A common stock pursuant to purchase rights granted to employees. A total of 3,000,000 shares of Class A common stock were initially reserved for future issuance under the 2020 ESPP. The number of shares of Class A common stock reserved for issuance under the 2020 ESPP is subject to automatic evergreen increases annually through (and including) May 1, 2030 pursuant to the terms of the 2020 ESPP. The 2020 ESPP permits participants to purchase shares of Class A common stock in an amount not exceeding 15% of their earnings during the relevant offering period. The offering dates and purchase dates for the 2020 ESPP are determined at the discretion of the Company’s board of directors. As of April 30, 2021, the Company had not yet launched its 2020 ESPP. Stock Options to Acquire Class A Common Stock These stock options generally expire 10 years from the date of grant, or earlier if services are terminated. Generally, each stock option for common stock is subject to a vesting schedule such that one fifth of the award vests after the first-year anniversary and one-sixtieth of the award vests each month thereafter over the remaining four years, subject to continuous service. A summary of the Company’s option activity during the periods indicated was as follows: Options Outstanding Number of Weighted Weighted Aggregate (in thousands) (in thousands) Balance as of April 30, 2019 23,372 $ 2.46 7.98 $ 50,679 Options granted 16,619 $ 4.86 Options exercised (1,809) $ 2.34 Options cancelled (5,305) $ 3.84 Balance as of April 30, 2020 32,877 $ 3.48 8.03 $ 116,962 Options granted 14,504 11.50 Options exercised (5,799) 2.90 Options cancelled (3,095) 5.89 Balance as of April 30, 2021 38,487 $ 6.39 7.98 $ 2,304,714 Vested and exercisable as of April 30, 2021 13,290 $ 3.35 6.55 $ 835,990 Vested and expected to vest as of 4/30/2021 (1) 39,578 $ 6.35 7.98 $ 2,371,708 (1) The number of options vested and expected to vest as of April 30, 2021 includes early exercised, unvested Class A common stock. Refer to Note 9. Stockholders’ Equity for more information. The weighted average grant date fair value of options granted during the fiscal year ended April 30, 2021 was $6.17. Aggregate intrinsic value represents the difference between the estimated fair value of the underlying common stock and the exercise price of outstanding in-the-money options. The total intrinsic value of options exercised during the fiscal year ended April 30, 2021 was $137.3 million. The total grant date fair value of options vested during the fiscal year ended April 30, 2021 was $15.0 million. As of April 30, 2021, there was $97.8 million of unrecognized compensation cost related to stock options which are expected to be recognized over an estimated weighted-average period of 3.8 years. The grant-date fair value of the options issued for the fiscal years ended April 30, 2021 and 2020 are estimated on the date of grant using the Black-Scholes-Merton option pricing model. The weighted average assumptions underlying the fair value estimation are provided in the following table: Fiscal Year Ended April 30, 2021 2020 Valuation assumptions: Expected dividend yield — % — % Expected volatility 43.8 % 38.6 % Expected term (years) 6.3 6.3 Risk-free interest rate 0.4 % 1.7 % Restricted Stock Units During the fiscal year ended April 30, 2021, the Company began granting RSUs to its employees. No RSUs were granted prior to the IPO. The RSUs are typically subject to service-based vesting conditions satisfied over five years with one-fifth of the award vesting after the first-year anniversary and one-twenty-fifth of the award vesting quarterly thereafter. The related stock-based compensation is recognized on a straight-line basis over the requisite service period. For the fiscal year ended April 30, 2021, the Company recognized stock-based compensation expense of $1.0 million associated with such RSUs. A summary of the Company’s RSU activities and related information is as follows: RSUs Outstanding Number of RSUs Weighted Average (in thousands) Unvested Balance as of April 30, 2020 — $ — RSUs granted 447 $ 74.52 RSUs vested — $ — RSUs forfeited — $ — Unvested Balance as of April 30, 2021 447 $ 74.52 As of April 30, 2021, there was $32.2 million of unrecognized stock-based compensation expense related to outstanding RSUs granted to employees that is expected to be recognized over a weighted-average period of 4.8 years. Stock-based Compensation Expense The following table summarizes the effects of stock-based compensation on the Company’s consolidated statements of operations (in thousands): Fiscal Year Ended April 30, 2021 2020 2019 Cost of subscription $ 828 $ 370 $ 149 Cost of professional services 376 122 69 Sales and marketing 9,080 3,074 1,739 Research and development 2,950 1,223 781 General and administrative 8,506 3,521 1,529 Total stock-based compensation expense $ 21,740 $ 8,310 $ 4,267 Shareholder Loan In January 2018, in connection with the Series F preferred stock financing, the Company issued 1,251,921 shares of Series F preferred stock in exchange for a note receivable of $24.5 million from its CEO. Prior to the automatic conversion of all Series F preferred stock outstanding into Class A common stock upon the completion of the IPO, the underlying shares of Series F preferred stock were legally outstanding though were not included in the carrying amounts of preferred stock as the note receivable is treated as an equity classified stock-based option grant. In September 2020, the Company’s CEO paid the outstanding full recourse promissory note and accrued interest in the amount of $26.0 million. No interest income was recorded for the note. Refer to Note 13. Related Party Transactions for more information.

Income Taxes

Income Taxes	12 Months Ended
	Apr. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The components of the Company’s net loss before provision for income taxes for the fiscal years ended April 30, 2021, 2020 and 2019 was as follows (in thousands): Fiscal Year Ended April 30, 2021 2020 2019 Domestic $ (58,407) $ (69,887) $ (33,868) Foreign 3,415 889 788 Net loss before provision for income taxes $ (54,992) $ (68,998) $ (33,080) The components of the Company’s provision for income taxes for the fiscal years ended April 30, 2021, 2020 and 2019 was as follows (in thousands): Fiscal Year Ended April 30, 2021 2020 2019 Current expense Federal $ — $ — $ — State 286 113 2 Foreign 418 267 264 Total 704 380 266 Deferred expense Federal — — — State — — — Foreign — — — Total — — — Total provision for income taxes $ 704 $ 380 $ 266 The reconciliation of U.S. federal statutory rate to the Company’s effective tax rate was follows (in thousands): Fiscal Year Ended April 30, 2021 2020 2019 Expected benefit at federal statutory rate $ (11,628) $ (14,489) $ (6,947) State tax expense—net of federal benefit 286 113 2 Impact of foreign operations (299) 85 306 Federal research and development credit (694) (530) (389) Change in valuation allowance 30,587 14,837 6,587 Stock-based compensation (17,667) (23) 337 Meals and entertainment 35 242 207 Other permanent items 84 145 163 Total provision for income taxes $ 704 $ 380 $ 266 The difference in the Company’s effective tax rate and the U.S. federal statutory tax rate is primarily due to recording a full valuation allowance on the Company’s U.S. deferred tax assets. The components of deferred tax assets and liabilities as of April 30, 2021 and 2020 was as follows (in thousands): As of April 30, 2021 2020 Deferred tax assets Accrued payroll $ 889 $ 2,081 Other accruals & reserves 4,053 3,174 Operating lease liability 1,323 2,235 Deferred revenue 1,258 2,959 Depreciation 1,588 1,365 Net operating losses 73,189 40,242 R&D tax credit 4,778 3,617 Stock based compensation 3,690 2,628 Other 327 (7) Gross deferred tax assets 91,095 58,294 Valuation allowance (88,015) (55,812) Total deferred tax assets 3,080 2,482 Deferred tax liabilities Prepaid expenses (1,883) (436) Operating lease right-of-use assets (1,197) (2,046) Total deferred tax liabilities (3,080) (2,482) Net deferred tax assets (liabilities) $ — $ — In determining the need for a valuation allowance, the Company weighs both positive and negative evidence in the various jurisdictions in which it operates to determine whether it is more likely than not that its deferred tax assets are recoverable. In assessing the ultimate realizability of its net deferred tax assets, the Company considers all available evidence, including cumulative losses since inception and expected future losses and as such, management does not believe it is more likely than not that the deferred tax assets will be realized. Accordingly, a full valuation allowance has been established in the U.S. and no deferred tax assets and related tax benefit have been recognized in the accompanying financial statements. The valuation allowance as of April 30, 2021 and 2020 was $88.0 million and $55.8 million, respectively. The increase of $32.2 million in the Company’s valuation allowance compared to the prior fiscal year was primarily due to an increase in deferred tax assets arising from net operating loss. As of April 30, 2021 and 2020, the Company had net operating loss carryforwards for federal income tax purposes of approximately $308.3 million and $168.6 million, respectively. The federal net operating loss carryforwards will expire, if not utilized, beginning in year 2029. Federal research and development tax credit carryforwards of approximately $5.4 million, will expire beginning in 2032 if not utilized. Federal charitable contribution carryforwards of approximately $14.3 million will expire beginning in 2022 if not utilized. Federal capital loss carryforwards of approximately $1.0 million will begin to expire in 2026 if not utilized. In addition, as of April 30, 2021 and 2020, the Company had net operating loss carryforwards for state income tax purposes of approximately $139.7 million and $73.2 million, respectively. The state net operating loss carryforwards will expire, if not utilized, beginning in the year 2032. The Company had state research and development tax credit carryforwards of approximately $5.3 million. The state research and development tax credits do not expire. State capitol loss carryforwards of approximately $0.4 million will begin to expire in 2026 if not utilized. The Tax Reform Act of 1986 and similar California legislation impose substantial restrictions on the utilization of net operating losses and tax credit carryforwards if there is a change in ownership as provided by Section 382 of the Internal Revenue Code and similar state provisions. Such a limitation could result in the expiration of the net operating loss carryforwards and tax credits before utilization. A reconciliation of the beginning and ending amount of the Company’s total gross unrecognized tax benefits was as follows (in thousands): As of April 30, 2021 2020 Balance as of May 1 $ 4,048 $ 3,037 Increases for tax positions related to the current year 1,285 1,011 Balance as of April 30 $ 5,333 $ 4,048 As of April 30, 2021, no amount of unrecognized tax benefits, if recognized, would impact the Company’s effective income tax rate, given the Company’s full valuation allowance position. The Company does not expect any unrecognized tax benefits to be recognized within the next 12 months. The Company recognizes interest and penalties related to unrecognized tax benefits as a component of income tax expense. As of April 30, 2021 and 2020, the Company has no cumulative interest and penalties related to unrecognized tax benefits. The Company does not anticipate a significant change in the unrecognized tax benefits over the next 12 months. The Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) was enacted by the United States on March 27, 2020. The CARES Act did not have a material impact on the Company’s provision for income taxes for the fiscal year ended April 30, 2021. The American Rescue Plan Act of 2021 (“ARPA”) was signed by President Biden on March 11, 2021. The legislation revised IRC Section 162(m) which will go into effect beginning with tax years that begin after December 31, 2026. It expanded the definition of “covered employees” to include an additional five highest-compensated employees which do not remain as covered employees indefinitely. The Company has assessed the relevant provisions and concludes the tax provisions of the ARPA did not have a material impact on the Company’s consolidated financial statements for the fiscal year ended April 30, 2021.

Net Loss Per Share Attributable

Net Loss Per Share Attributable to Common Stockholders	12 Months Ended
	Apr. 30, 2021
Earnings Per Share [Abstract]
Net Loss Per Share Attributable to Common Stockholders	Net Loss Per Share Attributable to Common Stockholders Basic and diluted net loss per share attributable to common stockholders is presented in conformity with the two-class method required for participating securities. Class A and B common shares have identical liquidation and distribution rights. Prior to the automatic conversion of all shares of redeemable convertible Class A-1 common stock into Class A common stock upon the completion of the IPO, the shares of redeemable convertible Class A-1 common stock had a liquidation preference, but were legal form common stock and participated in losses equally with all common stockholders. Prior to the automatic conversion of all of its redeemable convertible preferred stock outstanding into Class A and Class B common stock upon the completion of the IPO, the Company considered all redeemable convertible preferred stock to be participating securities because they participated in any dividends declared on the Company’s common stock on an as-if-converted basis. Redeemable convertible preferred stock did not participate in the net loss per share with common stockholders as the holders of the convertible preferred did not have a contractual obligation to share in the Company’s losses. Accordingly, under the two-class method, the net loss is not allocated to the redeemable convertible preferred stock such that the resulting net loss for all periods presented was allocated on a proportionate basis to shares of Class A, Class A-1, and Class B common stock for the number of days that each class was issued and outstanding during the period. Basic net loss per share attributable to common stockholders is computed by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period, less shares subject to repurchase. Diluted net loss per share attributable to common stockholders is computed by giving effect to all potential dilutive common stock equivalents outstanding for the period to the extent they are dilutive. For purposes of this calculation, the convertible preferred, stock options, and early exercised stock options subject to repurchase are considered to be potential common stock equivalents but have been excluded from the calculation of diluted net loss per share attributable to common stockholders as their effect is anti-dilutive for all periods presented. Basic net loss per share was the same as diluted net loss per share for the periods presented because the Company was in a loss position for years ended April 30, 2021, 2020 and 2019. The following table sets forth the computation of basic and diluted net loss per share attributable to common stockholders (in thousands, except per share data): Fiscal Year Ended April 30, 2021 2020 2019 Numerator Net loss attributable to common stockholders $ (55,696) $ (69,378) $ (33,346) Denominator Basic and diluted weighted-average Class A common shares outstanding 56,678 29,133 18,662 Basic and diluted weighted-average Class A-1 common shares outstanding 6,667 6,667 6,667 Basic and diluted weighted-average Class B common shares outstanding 3,500 — — Basic and diluted net loss per share attributable to common stockholders Basic and diluted net loss per Class A common shares outstanding $ (0.90) $ (1.94) $ (1.32) Basic and diluted net loss per Class A-1 common shares outstanding $ (0.55) $ (1.94) $ (1.32) Basic and diluted net loss per Class B common shares outstanding $ (0.35) $ — $ — At April 30, 2021, 2020 and 2019, the Company’s potentially dilutive securities were convertible preferred stock and stock options, which have been excluded from the computation of diluted net loss per share as the effect would be to reduce the net loss per share attributable to common stockholders. Based on the amounts outstanding at April 30, 2021, 2020 and 2019, the potential shares of common stock that were excluded from the computation of diluted net loss per share attributable to common stockholders for the period presented because including them would have had an antidilutive effect were as follows: Fiscal Year Ended April 30, 2021 2020 2019 Convertible preferred stock Series A* — 3,499,992 3,499,992 Series B* — 4,559,999 4,559,999 Series B-1A* — 2,430,635 2,430,635 Series B-1B* — 92,769 92,769 Series C* — 2,779,738 2,779,738 Series D — 12,278,422 12,278,422 Series E — 540,003 540,003 Series F — 5,399,581 5,399,581 Series G — 3,893,701 2,610,376 Series H — 1,653,928 — Stock options 39,577,809 33,533,380 23,821,538 RSUs 447,095 — —

Related Party Transactions

Related Party Transactions	12 Months Ended
	Apr. 30, 2021
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Shareholder Loan In January 2018, the Company issued 1,251,921 shares of Series F Preferred Stock in exchange for a non-recourse promissory note to Thomas M. Siebel, the Company’s CEO, in the amount of $24.5 million. The promissory note has a term of five years with the ability to renew for up to four successive one-year periods and bears interest at a rate of 2.18% per annum, compounded annually. In September 2020, Mr. Siebel paid the outstanding promissory note in full including accrued interest in the total amount of $26.0 million. Refer to Note 10. Stock-Based Compensation for more information. Secondary Transactions In October 2019, two secondary transactions occurred for total proceeds of $50.0 million each. The CEO sold 1,685,979 shares of Series D preferred and 193,489 shares of Series E preferred, each at a price of $26.6034 per share, to an existing stockholder. Additionally, the CEO sold 584,795 shares of Series C* preferred, 825,012 shares of Series D preferred, and 673,526 shares of redeemable convertible Class A-1 common stock at a price of $24.0000 per share to an existing stockholder. Stock-based compensation expense was not recognized in connection with these secondary transactions as the purchase price was equal to fair value in respect of the redemption and liquidation features of the shares sold at the time of sale. In October 2019, the Company also completed a tender offer to repurchase Class A common stock and vested stock options from employees, including officers, at a price of $30.2310 per share. Refer to Note 9. Stockholders’ Equity for more information. Revenue Transactions with Baker Hughes Company In June 2019, the Company entered into multiple agreements with Baker Hughes Company (“Baker Hughes”) under which Baker Hughes received a three-year subscription to use the Company’s software. These agreements were revised in June 2020 to extend the term to five years and modify the subscription fees due. Under the revised agreements, Baker Hughes has made minimum, non-cancelable revenue commitments, which are inclusive of their direct subscription fees and third party revenue generated through a joint marketing arrangement with Baker Hughes, in the amount of $46.7 million in fiscal year 2020, $53.3 million in fiscal year 2021, $75.0 million in fiscal year 2022, $125.0 million in fiscal year 2023, and $150.0 million in fiscal year 2024. During the fiscal year ended April 30, 2021, the Company recognized total revenue of $55.9 million related to this arrangement. For future periods, any shortfalls against the total annual revenue commitment made to the Company by Baker Hughes will be assessed and recorded. Under the joint marketing arrangement, the Company is obligated to pay Baker Hughes a sales commission on subscriptions and services offerings it resells in excess of these minimum revenue commitments. The Company recognized $8.3 million of sales commission as deferred costs during the fiscal year ended April 30, 2021 related to this arrangement, which will be amortized over an expected period of five years. As of April 30, 2021, the current portion of deferred costs of $1.7 million was included in prepaid expenses and other current assets and the non-current portion of $6.6 million was included in other assets, non-current. The Company amortized an immaterial amount of deferred commissions during the fiscal year ended April 30, 2021, and this amount was included in sales and marketing expense in the consolidated statements of operations. The sales commissions of $8.3 million is payable to Baker Hughes over the term of three-years based on the agreement. As of April 30, 2021, accrued and other current liabilities included $3.4 million and other long-term liabilities included $4.9 million. The Company did not incur any sales commission related to this arrangement during the fiscal years ended April 30, 2020 and 2019. The Company recognized subscription revenue from direct subscription fees from Baker Hughes of $30.6 million, $40.4 million and $0.1 million during the fiscal years ended April 30, 2021, 2020 and 2019, respectively and recognized professional services revenue from Baker Hughes of $4.8 million, $0.3 million and nil for the fiscal years ended April 30, 2021, 2020, and 2019, respectively. As of April 30, 2021 and 2020, accounts receivable, net included $15.2 million and $0.3 million and deferred revenue, current included $7.7 million and 1.5 million, respectively. The Company recognized cost of subscription revenue from Baker Hughes, of $0.1 million, nil and nil for the fiscal years ended April 30, 2021, 2020 and 2019, respectively. As of April 30, 2021 and 2020, accounts payable included $0.1 million and nil, respectively.

Summary of Business and Signi_2

Summary of Business and Significant Accounting Policies (Policies)	12 Months Ended
	Apr. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation and Principles of ConsolidationThe Company prepares its consolidated financial statements in accordance with generally accepted accounting principles in the United States (“GAAP”).
Principles of Consolidation	The consolidated financial statements include the accounts of C3.ai, Inc. and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of the accompanying consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities, and reported amounts of revenue and expenses. Actual results and outcomes could differ significantly from the Company’s estimates, judgments, and assumptions. Significant estimates include determining standalone selling price for performance obligations in contracts with customers and estimating variable consideration, the estimated expected benefit period for deferred contract acquisition costs, the useful lives of long-lived assets and other assumptions used to measure stock-based compensation, and the valuation of deferred income tax assets and uncertain tax positions. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. The Company adjusts such estimates and assumptions when facts and circumstances dictate. Changes in those estimates resulting from continuing changes in the economic environment will be reflected in the financial statements in future periods. As future events and their effects cannot be determined with precision, actual results could materially differ from those estimates and assumptions.
Fiscal Year	Fiscal YearThe Company’s fiscal year ends on April 30.
Concentration of Risk	Concentration of Risk Financial instruments that potentially subject the Company to concentration of credit risk consist of cash and cash equivalents, investments and accounts receivable. The majority of the Company’s cash and cash equivalents are held by one financial institution. The Company is exposed to that financial institution to the extent that its cash balance with that financial institution is in excess of Federal Deposit Insurance Company (“FDIC”) insurance limits. The Company’s investment policy is to invest in securities with a minimum rating of P1 by Moody’s, A1 by Standard & Poor’s, F-1 by Fitch’s or higher for short-term investments, and minimum rating of A2 by Moody’s, A by Standard & Poor’s, or A by Fitch’s or higher for long-term investments.
Cash and Cash Equivalents	Cash and Cash EquivalentsThe Company considers all highly liquid investments purchased with a maturity of three months or less to be cash equivalents.
Investments	Investments The Company determines the appropriate classification of investments at the time of purchase and reevaluates such determination at each period-end. The Company’s investments, comprised of money market funds, U.S. treasury securities, certificates of deposit, U.S. government agency securities, commercial paper and corporate debt securities, are classified as available-for-sale marketable securities. Such securities are carried at estimated fair values and reported in cash equivalents, short-term investments or long-term investments. Unrealized gains and losses, net of tax, are reported in other comprehensive (loss) income as a separate component on the consolidated statements of comprehensive loss. Fair value is determined based on quoted market rates when observable or by utilizing data points that are observable, such as quoted prices, interest rates and yield curves. Declines in fair value judged to be other-than-temporary on available-for-sale marketable securities are recorded within other income (expense), net on the consolidated statements of operations. In order to determine whether a decline in value is other-than-temporary, the Company evaluates, among other factors, the duration and extent to which the fair value has been less than the carrying value and its intent and ability to retain the investment for a period of time sufficient to allow for any anticipated recovery in fair value. The cost of securities sold is based on the specific-identification method. Interest on securities classified as available-for-sale marketable securities is included in interest income on the consolidated statements of operations.
Accounts Receivable	Accounts ReceivableAccounts receivable includes billed and unbilled receivables, net of allowance of doubtful accounts. Trade accounts receivable are recorded at invoiced amounts and do not bear interest. The expectation of collectability is based on a review of credit profiles of customers, contractual terms and conditions, current economic trends, and historical payment experience. The Company regularly reviews the adequacy of the allowance for doubtful accounts by considering the age of each outstanding invoice and the collection history of each customer to determine the appropriate amount of allowance for doubtful accounts.
Fair Value Measurements	Fair Value Measurements Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. Assets and liabilities that are measured at fair value are reported using a three-level fair value hierarchy that prioritizes the inputs used to measure fair value. This hierarchy maximizes the use of observable inputs and minimizes the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows: Level 1—Quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. Level 2—Inputs other than quoted prices in active markets that are observable for the asset or liability, either directly or indirectly. Level 3—Inputs that are unobservable for the asset or liability. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.
Property and Equipment	Property and Equipment Property and equipment are stated at cost less accumulated depreciation. Assets are depreciated using the straight-line method over useful lives of three
Impairment of Long-Lived Assets	Impairment of Long-Lived AssetsThe Company evaluates long-lived assets or asset groups for impairment whenever events indicate that the carrying value of an asset or asset group may not be recoverable based on expected future cash flows attributable to that asset or asset group. Recoverability of assets held and used is measured by comparing the carrying amount of an asset or an asset group to estimated undiscounted future net cash flows expected to be generated by the asset or asset group. If the carrying amount of an asset or asset group exceeds estimated undiscounted future cash flows, then an impairment charge would be recognized based on the excess of the carrying amount of the asset or asset group over its fair value. Assets to be disposed of are reported at the lower of their carrying amount or fair value less costs to sell.
Goodwill	GoodwillGoodwill is the amount by which the cost of acquired net assets in a business combination exceeds the fair value of the net identifiable assets on the date of purchase and is carried at its historical cost. The Company tests goodwill for impairment on an annual basis or more frequently if events or changes in circumstances indicate that the asset might be impaired. The Company performs its annual impairment test of goodwill as of February 1, and whenever events or circumstances indicate that the asset might be impaired.
Leases	Leases The Company has lease arrangements that include lease and non-lease components. The Company has elected to not account for the lease and non-lease components separately. For leases that commenced before the Company’s adoption date of Accounting Standards Codification (“ASC”) Topic 842, Leases , the Company elected the practical expedient to not reassess the following: (1) whether any expired or existing contracts contain leases; (2) the lease classification for any expired or existing leases; and (3) initial direct costs for any existing leases. For short-term leases, defined as leases with a lease term of 12 months or less, the Company elected to not recognize an associated lease liability and right-of-use (“ROU”), asset. Lease payments for short-term leases are expensed on a straight-line basis over the lease term.
Deferred Revenue, Revenue Recognition, and Costs to Obtain and Fulfill a Contract	Deferred Revenue Deferred revenue consists of billings or cash received for services in advance of revenue recognition and is recognized as revenue when all of the Company’s revenue recognition criteria are met. The portion of deferred revenue that is anticipated to be recognized as revenue during the succeeding twelve-month period is recorded as deferred revenue, current and the remaining portion is recorded as deferred revenue, non-current. The Company’s contract liabilities are classified as deferred revenue upon the right to invoice or when payments have been received for undelivered products or services. Revenue Recognition The Company accounts for revenue in accordance with ASC Topic 606, Revenue From Contracts With Customers (“ASC 606”) for all periods presented. The core principle of ASC 606 is to recognize revenue for the transfer of promised goods or services to customers in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. This principle is achieved by applying the following five-step approach: Identification of the Contract, or Contracts, with a Customer. A contract with a customer exists when (1) the Company enters into an enforceable contract with a customer that defines each party’s rights regarding the goods or services to be transferred and identifies the payment terms related to these goods or services, (2) the contract has commercial substance and (3) the Company determines that collection of substantially all consideration for goods or services that are transferred is probable based on the customer’s intent and ability to pay the promised consideration. The Company applies judgment in determining the customer’s ability and intention to pay, which is based on a variety of factors, including the customer’s historical payment experience or, in the case of a new customer, published credit and financial information pertaining to the customer. Identification of the Performance Obligations in the Contract. Performance obligations promised in a contract are identified based on the goods or services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the goods or services either on their own or together with other resources that are readily available from third parties or from the Company, and are distinct in the context of the contract, whereby the transfer of the goods or services is separately identifiable from other promises in the contract. To the extent a contract includes multiple promised goods or services, the Company applies judgment to determine whether promised goods or services are capable of being distinct and distinct in the context of the contract. If these criteria are not met, the promised goods or services are accounted for as a combined performance obligation. Determination of the Transaction Price. The transaction price is determined based on the consideration to which the Company will be entitled in exchange for transferring goods or services to the customer, net of sales taxes or value-added taxes. If the transaction price includes variable consideration, the Company includes an estimate of the amount it expects to receive if it is probable that a significant reversal of cumulative revenue recognized will not occur. Usage-based fees earned in exchange for the use of the Company’s software licenses and subscription services are subject to the usage-based royalty and series guidance variable consideration estimation exceptions, respectively. Allocation of the Transaction Price to the Performance Obligations in the Contract. Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation based on a relative standalone selling price (“SSP”). When appropriate, the Company determines SSP based on the price at which the performance obligation has previously been sold through past transactions, taking into account internally approved pricing guidelines related to the performance obligations. When the SSP of a license or subscription and bundled maintenance and support services is highly variable and the contract also includes additional performance obligations with observable SSP, the Company first allocates the transaction price to the performance obligations with established SSPs and then applies the residual approach to allocate the remaining transaction price to the license or subscription and bundled maintenance and support services. If applying the residual approach results in zero or very little consideration being allocated to the combined performance obligation, or to a bundle of goods or services, the Company will consider all reasonably available data to determine an appropriate allocation of the transaction price. If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Recognition of Revenue when, or as, Performance Obligations are Satisfied . The Company satisfies substantially all of its performance obligations over time, as discussed in further detail below. Revenue is recognized at the time the related performance obligation is satisfied with the transfer of a promised good or service to a customer over time. Subscription Revenue Subscription revenue is primarily comprised of term licenses, stand-ready COE support services, trials of our applications, and software-as-a-service (“SaaS”) offerings. Licenses represent a contractual right for a customer to take possession of the software and it is feasible for the customer to host the software independently. SaaS represents a right for a customer to access the software through the Company’s cloud environment and the customer does not have the right to take possession of the software. Subscriptions also include our maintenance and support services that comprised of critical and continuous updates to the software that are integral to maintaining the intended utility of the software over the contractual term. The Company’s software and maintenance and support services are highly interdependent and interrelated and represent a single distinct performance obligation within the context of the contract satisfied over time. Determining whether the software license and maintenance and support services are considered distinct performance obligations that should be accounted for separately or as one combined performance obligation may require significant judgment. In reaching its conclusion, the Company considered the nature of its promise to provide the customer real time analytics and machine learning algorithms that require regular re-training to maintain and improve prediction accuracy. The Company fulfills this promise by providing real time data feeds to the machine learning model and by providing regular tuning, optimization and critical updates to the constantly changing type system. Accordingly, the Company has determined that the software license and maintenance and support services fulfill a single promise to the customer under the contract. The Company’s subscriptions are generally offered under renewable, multi-year, fixed fee contracts where payments are typically due annually in advance. A time-elapsed output method is used to measure progress because the nature of the promise is a stand-ready service. The Company also offers premium stand-ready C3 Center of Excellence (“COE”) support services, hosting services and trial services, which are distinct performance obligations. A description of the Company’s offerings are as follows: • C3 AI Suite is a comprehensive suite that allows for the design, deployment, and operation of AI, predictive analytics, and applications at enterprise scale. The C3 AI Suite provides data scientists and application developers robust advantages for rapid application and analytics development and deployment. Customers primarily pay for the C3 AI Suite via fixed annual fees based on the number of development users allowed to access the C3 AI Suite. The AI Suite offering is primarily a term subscription but at times has been sold as a perpetual license and generates additional runtime subscription fees, a type of consumption or usage-based revenue based on compute and storage resources required to run the C3 AI Suite. • C3 AI Applications are production applications that address a wide range of predictive analytics use cases. C3 AI Applications are industry-tested and proven enterprise-grade applications built on a cohesive suite architecture that is designed to integrate and process highly dynamic data sets from sensor networks and enterprise and extraprise information systems, and enable advanced machine learning capabilities. C3 AI Applications sold without the C3 AI Suite can be in the form of term or perpetual licenses or subscriptions and earn revenue through a fixed fee and/or usage-based royalties. • C3 Maintenance and Support Services are provided for the C3 AI Suite and the C3 AI Applications that are selected by the customer. This support includes standard monitoring, performance monitoring, database maintenance, security monitoring, upgrading, backup and restore, patching, etc. provided by the Company. The Company continuously provides updates that are critical to the continued utility of the software. • COE Support Services. COE Support Services provide premium development services and support by an available pool of resources. The purpose of the COE is to allow the customer to utilize, extend or modify C3 applications and to develop its own applications on the C3 AI Suite. To facilitate customer’s efforts, C3 provides the following COE Support Services on C3 AI Suite and C3 applications to customer personnel during the subscription term of COE: (1) support and guidance on C3 AI overall software application architecture; (2) data integration, data science, and application development support on the C3 AI Suite; (3) training on the C3 AI Suite and C3 AI Applications to the customer project team members; and (4) support to help address any developmental issues faced by the customer. COE Support Services are generally offered under renewable, multi-year, fixed fee contracts whereby payments are primarily due annually in advance and in most cases are co-terminous with the C3 AI Suite subscription term. COE Support Services represent a stand-ready performance obligation comprised of a series of distinct days of service that is satisfied and recognized in revenue ratably over the term of the COE agreement. Revenue for COE Support Services is included within subscription revenue in the consolidated statements of operations. • Trials. Trial projects typically consist of several phases including project kickoff, design, data integration, configuration, validation and final demonstration. These trials are typically fixed-price eight to 16-week production pilots during which the Company works with customers to define a specific business problem or use case and address the use case using AI-based predictive analytics. During the trial, the Company integrates data, configures machine learning algorithms supporting the use case, and configures a user interface to present the resulting insights. At the end of a trial, the Company demonstrates a working application that shows the utility, benefit, and economic value to be gained from a production deployment of big data, analytics, and machine learning applications. These paid trials are solely meant to demonstrate the feasibility of the Company’s offering to the customer and provide them with a level of confidence to encourage them to enter into a large, multi-year arrangement with the Company. Trial revenue is recognized over time during the production pilot period. • Hosting Services. For certain customers, the Company provides access to the C3 AI Suite and/or C3 AI Applications in the Company’s cloud environment. The customer consumes and receives benefit throughout the hosting period from the entity’s performance of hosting and providing access to the hosted software, which the customer would otherwise have to undertake itself or obtain another party to do. The Company recognizes hosting services over time based on the consumption patterns of the customers. Customers who choose to install the C3 AI Suite and/or C3 AI Applications in their own cloud environments do not subscribe to the Company’s hosting services. Hosting services are generally offered as part of the subscription for C3 AI Suite and/or C3 Application arrangements and the amount of revenue recognized on a monthly basis varies based on actual consumption by the customer. Professional Services The Company’s professional services primarily include implementation services, training and prioritized engineering services. The Company offers a complete range of professional service support both onsite and remotely, including training, application design, project management, system design, data modeling, data integration, application design, development support, data science, and application and AI Suite administration support. Professional services fees are based on the level of effort required to perform such tasks and are typically a fixed-fee engagement with a duration of less than 12 months. Contract balances The Company typically invoices customers for subscription fees in annual increments upon execution of the initial contract or subsequent renewal, payable within 30 to 60 days, and providing customers access to C3 AI Suite and/or C3 AI Applications. Monthly usage-based runtime and hosting charges are billed as they are delivered. Certain government contracts are cancellable during the subscription term depending on the future fiscal funding available to the contract. The Company has not experienced any cancellation due to the funding constraint related to such contracts. The timing of revenue recognition may differ from the timing of invoicing to customers. Accounts receivable are recorded at the invoiced amount, net of an allowance for doubtful accounts. A receivable is recognized in the period the Company delivers goods or provides services, or when the Company’s right to consideration is unconditional, whichever is earlier. In situations where revenue recognition occurs before invoicing, an unbilled receivable is recorded. While the timing of revenue recognition usually differs from the timing of payment, the Company has determined the contracts generally do not include a significant financing component, because the period between when the Company transfers its software and services to a customer and when the customer pays for the software and service is one year or less. The primary purpose of the invoicing terms is to provide customers with simplified and predictable ways of purchasing the Company’s software and services, not to receive financing from the customers or to provide customers with financing. Costs to Obtain and Fulfill a Contract The Company’s customer acquisition costs are primarily related to sales commissions if such costs are incremental costs to obtain a contract without a service condition. Sales commissions are deferred and then amortized taking into consideration the pattern of transfer to which assets relate. If the commissions paid on the initial and renewal contracts are not commensurate, the Company amortizes the commissions paid on the initial contract over an expected period of benefit, including expected renewals, which is determined to be approximately five years. In arriving at the average period of benefit the Company considered the duration of the Company’s relationships with customers and the Company’s technology. Sales commissions for renewal contracts are generally deferred and amortized over the contract period. Sales commissions for non-recurring contracts with a duration of one year or less are expensed when incurred. Costs to obtain and fulfill a contract that will be amortized within the succeeding 12-month period are classified as current and included in prepaid expenses and other current assets on the consolidated balance sheets. The remaining balance is classified as non-current and are included in other assets on the consolidated balance sheets.
Cost of Revenue	Cost of Revenue Cost of subscription revenue consists primarily of costs related to compensation, including salaries, bonuses, benefits, stock-based compensation and other related expenses for the production environment, support and COE staff, hosting of the Company’s AI Suite, including payments to outside cloud service providers, and allocated overhead and depreciation for facilities. Cost of professional services revenue consists primarily of compensation, including salaries, bonuses, benefits, stock-based compensation and other related costs associated with the Company’s professional service personnel, and allocated overhead and depreciation for facilities.
Warranties	Warranties The Company’s offerings are warranted to perform in a manner consistent with industry standards. The Company’s arrangements generally include provisions for indemnifying customers against liabilities if its services infringe on a third party’s intellectual property rights. They also generally include service-level agreements warranting defined levels of uptime reliability and performance. To date, the Company has not incurred material costs as a result of its warranties and indemnifications. There are no accrued liabilities related to these obligations on the consolidated financial statements.
Stock-Based Compensation	Stock-Based Compensation Stock-based compensation expense related to stock option awards and restricted stock units (“RSUs”) is recognized based on the fair value of the awards granted. The fair value of each option award is estimated on the grant date using the Black-Scholes option pricing model. The Black-Scholes option pricing model requires the input of highly subjective assumptions, including the fair value of the underlying common stock, the expected term of the option, the expected volatility of the price of the Company’s common stock, risk-free interest rates, and the expected dividend yield of the Company’s common stock. The assumptions used to determine the fair value of the option awards represent management’s best estimates. These estimates involve inherent uncertainties and the application of management’s judgment. The fair value of each RSU is based on the fair value of the Company’s common stock on the date of grant. The related stock-based compensation expense is recognized on a straight-line basis over the requisite service period of the awards. The Company accounts for forfeitures as they occur.
Software Development Costs	Software Development Costs The Company capitalizes certain software development costs subsequent to the establishment of technological feasibility. Based on the Company’s product development process and substantial development risks, the Company’s products are made available for general release as soon as technological feasibility is reached. The Company has not capitalized any related software development costs in any of the periods presented.
Advertising Expenses	Advertising Expenses Advertising expenses of $35.3 million, $29.2 million and $5.2 million incurred during the fiscal years ended April 30, 2021, 2020 and 2019, respectively, were expensed as incurred as a component of sales and marketing expenses on the consolidated statements of operations.
401(k) Plan	401(k) PlanThe Company has a 401(k) tax deferred savings plan under which eligible employees may elect to have a portion of their salary deferred and contributed to the plan. Employer matching contributions are determined by the Company and are discretionary.
Foreign Currency	Foreign Currency The functional currency of the Company’s foreign subsidiaries is the U.S. dollar. Accordingly, monetary assets and liabilities of the Company’s foreign subsidiaries are remeasured into U.S. dollars at the exchange rates in effect at the reporting date, non-monetary assets and liabilities are re-measured at historical rates, and revenue and expenses are re-measured at average exchange rates in effect during each reporting period. Foreign currency transaction gains and losses are recognized in other income (expense), net within the consolidated statements of operations.
Income Taxes	Income Taxes The Company accounts for income taxes using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the consolidated financial statements. Under this method, the Company determines deferred tax assets and liabilities on the basis of the differences between the financial statement and tax bases of assets and liabilities by using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date. Deferred tax assets are recognized to the extent that these assets are more likely than not to be realized. In making such a determination, the Company considers all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, and results of recent operations. If the Company determines that it is able to realize its deferred tax assets in the future in excess of their net recorded amount, the Company records an adjustment to the deferred tax asset valuation allowance, which reduces the provision for income taxes. Tax benefits from uncertain tax positions are recognized only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the Company’s consolidated financial statements from such positions are measured based on the largest benefit that has a greater than 50% likelihood of being realized. Interest and penalties are recognized associated with tax matters as part of the income tax provision and include accrued interest and penalties with the related income tax liability on the Company’s consolidated balance sheets.
Net Loss Per Share Attributable to Common Stockholders	Net Loss Per Share Attributable to Common Stockholders Basic and diluted net loss per share attributable to common stockholders is presented in conformity with the two-class method required for participating securities. The Company considers all series of its redeemable convertible preferred stock to be participating securities. Under the two-class method, the net loss attributable to common stockholders is not allocated to the redeemable convertible preferred stock as the holders of its redeemable convertible preferred stock do not have a contractual obligation to share in the Company’s losses. Net income is attributed to common stockholders and participating securities based on their participation rights. Basic net loss per share attributable to common stockholders is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period. Diluted earnings per share attributable to common stockholders adjusts basic earnings per share for the potentially dilutive impact of stock options, RSUs and redeemable convertible preferred stock. As the Company has reported losses for all periods presented, all potentially dilutive securities are antidilutive and accordingly, basic net loss per share equals diluted net loss per share.
Segment Information	Segment InformationOperating segments are defined as components of an entity where discrete financial information is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and assessing performance. The Company has identified its Chief Executive Officer (“CEO”) as the chief operating decision maker (“CODM”). The Company operates in one operating segment. The Company’s CODM allocates resources and assesses performance at the consolidated level.
Contribution Accounting	Contribution AccountingThe Company entered into an agreement establishing the C3.ai Digital Transformation Institute (“C3.ai DTI”), a program established to attract the world’s leading scientists to join in a coordinated and innovative effort to advance the digital transformation of business, government, and society. As part of the agreement, the Company issued cash grants to C3.ai DTI which are conditional in nature and subject to execution of the program in line with specific requirements on a quarterly basis. The cash grants do not represent an exchange transaction since there is not a commensurate transfer of resources at fair value, resulting in the application of the contribution accounting model. Contributions are allocated between sales and marketing and research and development based on the estimated benefits received by the Company. The Company’s initial contribution to C3.ai DTI provided equal benefits across sales and marketing and research and development. From fiscal year 2021, the Company expected contributions to C3.ai DTI to primarily benefit its research and development efforts.
Recent Accounting Pronouncements	Recent Accounting Pronouncements The Company currently qualifies as an “emerging growth company” under the Jumpstart Our Business Startups Act (“JOBS Act”) of 2012. Accordingly, the Company is provided the option to adopt new or revised accounting guidance either (1) within the same periods as those otherwise applicable to public business entities or (2) within the same time periods as private companies, including early adoption when permissible. The Company has elected to adopt new or revised accounting guidance within the same time period as private companies. Recently Adopted Accounting Standards In January 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities , which makes targeted improvements to the accounting for, and presentation and disclosure of, financial instruments. ASU No. 2016-01 requires that most equity investments be measured at fair value, with subsequent changes in fair value recognized in net income. ASU No. 2016-01 does not affect the accounting for equity investments that would otherwise be consolidated or accounted for under the equity method. The new standard also affects financial liabilities under the fair value option and the presentation and disclosure requirements for financial instruments. The Company adopted this guidance in the fiscal year beginning May 1, 2019 using the modified retrospective transition method for investments in marketable securities and the prospective transition method for investments in non-marketable securities. Adoption of this guidance did not have a material impact to the Company’s consolidated financial statements and related disclosures. In February 2016, the FASB issued ASU No. 2016-02, Leases , that supersedes ASC Topic 840, Leases. Subsequently, the FASB issued several updates to ASU No. 2016-02, codified in ASC Topic 842. The Company early adopted ASC 842, Leases, on May 1, 2019 using the modified retrospective method for all leases not substantially completed as of the date of adoption. The consolidated financial statements as of and for the year ended April 30, 2020 reflect the application of ASC 842 guidance while the consolidated financial statements as of and for the year ended April 30, 2019 were prepared under the previous guidance of ASC 840. The cumulative impact of the adoption of ASC 842 was not material, therefore, the Company did not record any adjustments to retained earnings. As a result of adopting ASC 842, the Company recorded operating lease ROU assets of $11.5 million, operating lease liabilities of $12.4 million, and a reduction of $0.9 million to deferred rent, primarily related to the corporate office lease, based on the present value of the future lease payments on the date of adoption. The Company determines if an arrangement is a lease or contains an embedded lease at inception if it contains the right to control the use of an identified asset. The Company determines whether a contract conveys the right to control the use of an identified asset for a period of time if the contract contains both the right to obtain substantially all of the economic benefits from the use of the identified asset and the right to direct the use of the identified asset. In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , which requires a financial asset measured at amortized cost basis to be presented at the net amount expected to be collected. Credit losses relating to available-for-sale debt securities should be recorded through an allowance for credit losses. The guidance also limits the amount of credit losses to be recognized for available-for-sale debt securities to the amount by which carrying value exceeds fair value and requires the reversal of previously recognized credit losses if fair value increases. The guidance is effective for the fiscal year beginning May 1, 2023 with early adoption permitted. The Company early adopted the guidance as of May 1, 2020 using a prospective transition method. Adoption of this guidance did not have a material impact to the Company’s consolidated financial statements and related disclosures. In January 2017, the FASB issued ASU No. 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. ASU 2018-04 simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. The guidance is effective for the fiscal year beginning May 1, 2023 with early adoption permitted. The Company early adopted the guidance as of May 1, 2020 using a prospective transition method. Adoption of this guidance did not have a material impact to the Company’s consolidated financial statements and related disclosures. In July 2017, the FASB issued ASU No. 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), Derivatives and Hedging (Topic 815) I. Accounting for Certain Financial Instruments with Down Round Features II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception . Part I of this standard applies to entities that issue financial instruments such as warrants, convertible debt or redeemable convertible preferred stock that contain down-round features. Part II of this standard replaces the indefinite deferral for certain mandatorily redeemable noncontrolling interests and mandatorily redeemable financial instruments of nonpublic entities contained within ASC Topic 480 with a scope exception and does not impact the accounting for these mandatorily redeemable instruments. The Company adopted the guidance as of May 1, 2020 using a prospective transition method. Adoption of this guidance did not have a material impact to the Company’s consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement , which modifies the disclosure requirements on fair value measurements with respect to Level 3 rollforwards, timing of liquidation of investments in certain entities that calculate net asset value, and measurement uncertainty. The Company adopted the guidance as of May 1, 2020 using a prospective transition method. Adoption of this guidance did not have a material impact to the Company’s consolidated financial statements and related disclosures. Recently Issued Accounting Standards Not Yet Adopted In August 2018, the FASB issued ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract , which requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in ASC 350-40 to determine which implementation costs to defer and recognize as an asset. The guidance is effective for the fiscal year beginning May 1, 2021. Early adoption is permitted. The Company has determined that this guidance will not have a material impact on its consolidated financial statements and related disclosures. In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740)—Simplifying the Accounting for Income Taxes . The amendments in this update simplify various aspects of the accounting for income tax by eliminating certain exceptions to the general approach under existing accounting guidance provided by ASC 740, Income Taxes, and clarifies certain aspects of the existing guidance to promote more consistent application. The amendments in this new standard include, the elimination of exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. The new standard also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill and that single-member limited liability companies and similar disregarded entities that are not subject to income tax are not required to recognize an allocation of consolidated income tax expense in their separate financial statements, but could elect to do so. The guidance is effective for the Company beginning May 1, 2022. Early adoption is permitted. The Company is currently evaluating the effect that this guidance will have on the consolidated financial statements and related disclosures.

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Apr. 30, 2021
Revenue from Contract with Customer [Abstract]
Schedule of Revenue by Geographical Region	The following table presents revenue by geographical region (in thousands): Fiscal Year Ended April 30, 2021 2020 2019 North America (1) $ 119,795 $ 121,485 $ 61,314 Europe, the Middle East and Africa (1) 56,030 33,086 27,629 Asia Pacific (1) 5,992 2,095 2,662 Rest of World (1) 1,400 — — Total revenue $ 183,217 $ 156,666 $ 91,605 __________________ (1) The United States comprised 65%, 78% and 66% of the Company’s revenue in the fiscal years ended April 30, 2021, 2020 and 2019, respectively. France comprised 12%, 10.5% and 15% of the Company’s revenue in the fiscal years ended April 30, 2021, 2020 and 2019, respectively. The Netherlands comprised 12% in the fiscal year ended April 30, 2021. No other country comprised 10% or greater of the Company’s revenue for each of the fiscal years ended April 30, 2021, 2020 and 2019.
Schedule of Deferred Revenue Balance and Changes in Deferred Revenues Balances	The following table reflects the deferred revenue balance (in thousands): As of April, 30 2021 2020 Deferred revenue, current $ 72,263 $ 53,537 Deferred revenue, non-current 2,964 6,758 Total deferred revenue $ 75,227 $ 60,295 Significant changes in the deferred revenue balances during the fiscal years ended April 30, 2021 and 2020 were as follows (in thousands): Deferred Revenue May 1, 2019 $ 91,225 Performance obligations satisfied during the period that were included in the deferred revenue balance at the beginning of the year (83,093) Increases due to invoicing prior to satisfaction of performance obligations 52,163 April 30, 2020 60,295 Performance obligations satisfied during the period that were included in the deferred revenue balance at the beginning of the year (57,542) Increases due to invoicing prior to satisfaction of performance obligations 72,474 April 30, 2021 $ 75,227

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Apr. 30, 2021
Fair Value Disclosures [Abstract]
Schedule of Assets Measured at Fair Value on a Recurring Basis	The following table summarizes the types of assets measured at fair value on a recurring basis by level within the fair value hierarchy (in thousands): As of April 30, 2021 As of April 30, 2020 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 43,401 $ — $ — $ 43,401 $ 10,260 $ — $ — $ 10,260 Available-for-sale marketable securities: U.S. treasury securities — 57,998 — 57,998 — 11,500 — 11,500 Certificates of deposit — 422,978 — 422,978 — 28,477 — 28,477 U.S. government agencies securities — — — — — 10,074 — 10,074 Commercial paper — 494,676 — 494,676 — 94,397 — 94,397 Corporate debt securities — 2,368 — 2,368 — 68,425 — 68,425 Total cash equivalents and available-for-sale marketable securities $ 43,401 $ 978,020 $ — $ 1,021,421 $ 10,260 $ 212,873 $ — $ 223,133

Investments (Tables)

Investments (Tables)	12 Months Ended
	Apr. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Schedule of Cash Equivalents and Available-For-Sale Marketable Securities and Balance Sheet Classification	The following table summarizes the Company’s cash equivalents and available-for-sale marketable securities (in thousands): As of April 30, 2021 As of April 30, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Cash equivalents: Money market funds $ 43,401 $ — $ — $ 43,401 $ 10,260 $ — $ — $ 10,260 Available-for-sale marketable securities: U.S. treasury securities 57,993 5 — 57,998 11,489 11 — 11,500 Certificates of deposit 422,952 32 (6) 422,978 28,476 1 — 28,477 U.S. government agencies securities — — — — 9,995 79 — 10,074 Commercial paper 494,625 64 (13) 494,676 94,242 155 — 94,397 Corporate debt securities 2,369 — (1) 2,368 68,246 179 — 68,425 Total cash equivalents and available-for-sale marketable securities $ 1,021,340 $ 101 $ (20) $ 1,021,421 $ 222,708 $ 425 $ — $ 223,133
Summary of Available-For-Sale Marketable Securities by Contractual Maturity	The following table summarizes the Company’s available-for-sale marketable securities by contractual maturity (in thousands): As of April 30, 2021 As of April 30, 2020 Amortized Cost Fair Value Amortized Cost Fair Value Within one year $ 977,939 $ 978,020 $ 212,449 $ 212,873 After one year through five years — — — — Total $ 977,939 $ 978,020 $ 212,449 $ 212,873

Balance Sheet Details (Tables)

Balance Sheet Details (Tables)	12 Months Ended
	Apr. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Property and Equipment	Property and equipment consisted of the following at April 30, 2021 and 2020 (in thousands): Useful Life As of April 30, (in months) 2021 2020 Leasehold improvements * $ 8,658 $ 8,215 Computer equipment 36 2,539 2,028 Office furniture and equipment 60 339 339 Total property and equipment 11,536 10,582 Less accumulated depreciation (5,403) (1,859) Property and equipment, net $ 6,133 $ 8,723 __________________ * Leasehold improvements are amortized over the shorter of the estimated useful lives of the improvements or the remaining lease term.
Schedule of Accrued Compensation and Employee Benefits	Accrued compensation and employee benefits consisted of the following at April 30, 2021 and 2020 (in thousands): As of April 30, 2021 2020 Accrued bonus $ 12,216 $ 8,356 Accrued vacation 3,935 2,823 Accrued payroll taxes and benefits 3,405 1,397 Accrued commission 1,863 515 Accrued salaries 410 602 Accrued compensation and employee benefits $ 21,829 $ 13,693
Schedule of Accrued and Other Current Liabilities	Accrued and other current liabilities consisted of the following at April 30, 2021 and 2020 (in thousands): As of April 30, 2021 2020 Liability for common stock exercised prior to vesting $ 5,331 $ 2,243 Accrued general expenses 3,588 1,466 Operating lease liabilities, current 3,894 3,533 Other 5,505 1,841 Accrued and other current liabilities $ 18,318 $ 9,083

Leases (Tables)

Leases (Tables)	12 Months Ended
	Apr. 30, 2021
Leases [Abstract]
Schedule of Components of Lease Costs	The components of total lease costs, including variable lease costs, for the fiscal years ended April 30, 2021 and 2020 were as follows (in thousands): Fiscal Year Ended April 30, Lease Costs 2021 2020 Operating lease costs $ 3,793 $ 3,825 Short term lease costs 1,568 1,324 Variable lease costs 1,589 1,542 Total lease costs $ 6,950 $ 6,691 Fiscal Year Ended April 30, 2021 2020 Cash paid for amounts included in the measurement of operating lease liabilities: Operating cash flows from operating leases $ 4,031 $ 3,946 The following table presents the lease balances within the consolidated balance sheet, weighted-average remaining lease term, and weighted-average discount rates related to the Company’s operating leases (in thousands): As of April 30, Operating leases 2021 2020 Right-of-use assets Other assets, non-current $ 5,094 $ 8,409 Lease liabilities, current Other current liabilities 3,894 3,533 Lease liabilities, non-current Other long-term liabilities 1,735 5,647 Total operating lease liabilities $ 5,629 $ 9,180 As of April 30, Operating leases 2021 2020 Weighted average remaining lease term (in months) 17.0 28.9 Weighted average discount rate 7.3 % 7.3 %
Schedule of Supplemental Cash Flow, Balance Sheet, and Lease Terms Information	The components of total lease costs, including variable lease costs, for the fiscal years ended April 30, 2021 and 2020 were as follows (in thousands): Fiscal Year Ended April 30, Lease Costs 2021 2020 Operating lease costs $ 3,793 $ 3,825 Short term lease costs 1,568 1,324 Variable lease costs 1,589 1,542 Total lease costs $ 6,950 $ 6,691 Fiscal Year Ended April 30, 2021 2020 Cash paid for amounts included in the measurement of operating lease liabilities: Operating cash flows from operating leases $ 4,031 $ 3,946 The following table presents the lease balances within the consolidated balance sheet, weighted-average remaining lease term, and weighted-average discount rates related to the Company’s operating leases (in thousands): As of April 30, Operating leases 2021 2020 Right-of-use assets Other assets, non-current $ 5,094 $ 8,409 Lease liabilities, current Other current liabilities 3,894 3,533 Lease liabilities, non-current Other long-term liabilities 1,735 5,647 Total operating lease liabilities $ 5,629 $ 9,180 As of April 30, Operating leases 2021 2020 Weighted average remaining lease term (in months) 17.0 28.9 Weighted average discount rate 7.3 % 7.3 %
Schedule of Maturities of Operating Lease Liabilities	Future minimum payments under lease obligations at April 30, 2021 were as follows (in thousands): As of April 30, 2021 Fiscal 2022 $ 4,152 Fiscal 2023 1,756 Fiscal 2024 — Fiscal 2025 — Fiscal 2026 and thereafter — Total future minimum lease payments 5,908 Less: Imputed interest (279) Total operating lease liabilities $ 5,629

Redeemable Convertible Prefer_2

Redeemable Convertible Preferred Stock and Redeemable Convertible A-1 Common Stock (Tables)	12 Months Ended
	Apr. 30, 2021
Temporary Equity Disclosure [Abstract]
Schedule of Redeemable Convertible Preferred Stock Outstanding	Redeemable convertible preferred stock outstanding as of April 30, 2020, respectively, consisted of the following (in thousands, except share amounts): Shares Liquidation Carrying Authorized Outstanding Series A* 21,000,000 3,499,992 $ 7,000 $ 7,000 Series B* 27,360,000 4,559,999 9,120 9,120 Series B-1A* 14,583,945 2,430,635 15,853 15,717 Series B-1B* 556,680 92,769 1,210 1,210 Series C* 16,678,511 2,779,738 19,014 18,980 Series D 73,670,824 12,278,422 103,662 103,531 Series E 3,240,060 540,003 11,803 11,756 Series F 42,701,251 5,399,581 81,322 81,157 Series G 23,392,520 3,893,701 77,194 76,900 Series H 9,923,588 1,653,928 50,000 49,836 Total convertible preferred stock 233,107,379 37,128,768 $ 376,178 $ 375,207 Redeemable convertible Class A-1 common stock outstanding as of April 30, 2020, consisted of the following (in thousands, except share amounts): As of April 30, 2020 Shares Liquidation Carrying Authorized Outstanding Class A-1 common stock 6,666,667 6,666,665 $ 18,800 $ 18,800

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Apr. 30, 2021
Share-based Payment Arrangement [Abstract]
Summary of Stock Option Activity	A summary of the Company’s option activity during the periods indicated was as follows: Options Outstanding Number of Weighted Weighted Aggregate (in thousands) (in thousands) Balance as of April 30, 2019 23,372 $ 2.46 7.98 $ 50,679 Options granted 16,619 $ 4.86 Options exercised (1,809) $ 2.34 Options cancelled (5,305) $ 3.84 Balance as of April 30, 2020 32,877 $ 3.48 8.03 $ 116,962 Options granted 14,504 11.50 Options exercised (5,799) 2.90 Options cancelled (3,095) 5.89 Balance as of April 30, 2021 38,487 $ 6.39 7.98 $ 2,304,714 Vested and exercisable as of April 30, 2021 13,290 $ 3.35 6.55 $ 835,990 Vested and expected to vest as of 4/30/2021 (1) 39,578 $ 6.35 7.98 $ 2,371,708 (1) The number of options vested and expected to vest as of April 30, 2021 includes early exercised, unvested Class A common stock. Refer to Note 9. Stockholders’ Equity for more information.
Schedule of Valuation Assumptions	The weighted average assumptions underlying the fair value estimation are provided in the following table: Fiscal Year Ended April 30, 2021 2020 Valuation assumptions: Expected dividend yield — % — % Expected volatility 43.8 % 38.6 % Expected term (years) 6.3 6.3 Risk-free interest rate 0.4 % 1.7 %
Schedule of Restricted Stock Unit Activity	A summary of the Company’s RSU activities and related information is as follows: RSUs Outstanding Number of RSUs Weighted Average (in thousands) Unvested Balance as of April 30, 2020 — $ — RSUs granted 447 $ 74.52 RSUs vested — $ — RSUs forfeited — $ — Unvested Balance as of April 30, 2021 447 $ 74.52
Summary of Effects of Stock-Based Compensation	The following table summarizes the effects of stock-based compensation on the Company’s consolidated statements of operations (in thousands): Fiscal Year Ended April 30, 2021 2020 2019 Cost of subscription $ 828 $ 370 $ 149 Cost of professional services 376 122 69 Sales and marketing 9,080 3,074 1,739 Research and development 2,950 1,223 781 General and administrative 8,506 3,521 1,529 Total stock-based compensation expense $ 21,740 $ 8,310 $ 4,267

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Apr. 30, 2021
Income Tax Disclosure [Abstract]
Schedule of Components of Net Loss Before Income Taxes	The components of the Company’s net loss before provision for income taxes for the fiscal years ended April 30, 2021, 2020 and 2019 was as follows (in thousands): Fiscal Year Ended April 30, 2021 2020 2019 Domestic $ (58,407) $ (69,887) $ (33,868) Foreign 3,415 889 788 Net loss before provision for income taxes $ (54,992) $ (68,998) $ (33,080)
Schedule of Provision for Income Tax Expenses	The components of the Company’s provision for income taxes for the fiscal years ended April 30, 2021, 2020 and 2019 was as follows (in thousands): Fiscal Year Ended April 30, 2021 2020 2019 Current expense Federal $ — $ — $ — State 286 113 2 Foreign 418 267 264 Total 704 380 266 Deferred expense Federal — — — State — — — Foreign — — — Total — — — Total provision for income taxes $ 704 $ 380 $ 266
Schedule of Federal Statutory Rate to Effective Tax Rate Reconciliation	The reconciliation of U.S. federal statutory rate to the Company’s effective tax rate was follows (in thousands): Fiscal Year Ended April 30, 2021 2020 2019 Expected benefit at federal statutory rate $ (11,628) $ (14,489) $ (6,947) State tax expense—net of federal benefit 286 113 2 Impact of foreign operations (299) 85 306 Federal research and development credit (694) (530) (389) Change in valuation allowance 30,587 14,837 6,587 Stock-based compensation (17,667) (23) 337 Meals and entertainment 35 242 207 Other permanent items 84 145 163 Total provision for income taxes $ 704 $ 380 $ 266
Schedule of Components of Deferred Tax Assets and Liabilities	The components of deferred tax assets and liabilities as of April 30, 2021 and 2020 was as follows (in thousands): As of April 30, 2021 2020 Deferred tax assets Accrued payroll $ 889 $ 2,081 Other accruals & reserves 4,053 3,174 Operating lease liability 1,323 2,235 Deferred revenue 1,258 2,959 Depreciation 1,588 1,365 Net operating losses 73,189 40,242 R&D tax credit 4,778 3,617 Stock based compensation 3,690 2,628 Other 327 (7) Gross deferred tax assets 91,095 58,294 Valuation allowance (88,015) (55,812) Total deferred tax assets 3,080 2,482 Deferred tax liabilities Prepaid expenses (1,883) (436) Operating lease right-of-use assets (1,197) (2,046) Total deferred tax liabilities (3,080) (2,482) Net deferred tax assets (liabilities) $ — $ —
Schedule of Unrecognized Tax Benefits Reconciliation	A reconciliation of the beginning and ending amount of the Company’s total gross unrecognized tax benefits was as follows (in thousands): As of April 30, 2021 2020 Balance as of May 1 $ 4,048 $ 3,037 Increases for tax positions related to the current year 1,285 1,011 Balance as of April 30 $ 5,333 $ 4,048

Net Loss Per Share Attributab_2

Net Loss Per Share Attributable to Common Stockholders (Tables)	12 Months Ended
	Apr. 30, 2021
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Net Loss Per Share	The following table sets forth the computation of basic and diluted net loss per share attributable to common stockholders (in thousands, except per share data): Fiscal Year Ended April 30, 2021 2020 2019 Numerator Net loss attributable to common stockholders $ (55,696) $ (69,378) $ (33,346) Denominator Basic and diluted weighted-average Class A common shares outstanding 56,678 29,133 18,662 Basic and diluted weighted-average Class A-1 common shares outstanding 6,667 6,667 6,667 Basic and diluted weighted-average Class B common shares outstanding 3,500 — — Basic and diluted net loss per share attributable to common stockholders Basic and diluted net loss per Class A common shares outstanding $ (0.90) $ (1.94) $ (1.32) Basic and diluted net loss per Class A-1 common shares outstanding $ (0.55) $ (1.94) $ (1.32) Basic and diluted net loss per Class B common shares outstanding $ (0.35) $ — $ —
Schedule of Potential Shares of Common Stock Excluded from Computation of Basic and Diluted Net Loss Per Share	Based on the amounts outstanding at April 30, 2021, 2020 and 2019, the potential shares of common stock that were excluded from the computation of diluted net loss per share attributable to common stockholders for the period presented because including them would have had an antidilutive effect were as follows: Fiscal Year Ended April 30, 2021 2020 2019 Convertible preferred stock Series A* — 3,499,992 3,499,992 Series B* — 4,559,999 4,559,999 Series B-1A* — 2,430,635 2,430,635 Series B-1B* — 92,769 92,769 Series C* — 2,779,738 2,779,738 Series D — 12,278,422 12,278,422 Series E — 540,003 540,003 Series F — 5,399,581 5,399,581 Series G — 3,893,701 2,610,376 Series H — 1,653,928 — Stock options 39,577,809 33,533,380 23,821,538 RSUs 447,095 — —

Summary of Business and Signi_3

Summary of Business and Significant Accounting Policies (Details)	1 Months Ended		12 Months Ended
	Dec. 31, 2020USD ($)$ / sharesshares	Nov. 30, 2020shares	Apr. 30, 2021USD ($)segmentshares	Apr. 30, 2020USD ($)shares	Apr. 30, 2019USD ($)	May 01, 2019USD ($)
Subsidiary, Sale of Stock [Line Items]
Reverse stock split ratio, common stock		0.1667
Deferred offering costs reclassified into stockholders' equity as a reduction of the IPO proceeds	$ 7,200,000
Restricted cash			$ 900,000	$ 500,000	$ 500,000
Allowance for doubtful accounts			800,000	800,000
Unbilled receivables			3,800,000	500,000
Long-lived assets, impairment			0	0
Goodwill, impairment			$ 0	0
Deferred costs, sales commissions, amortization period			5 years
Accrued liabilities, warranties			$ 0
Advertising expenses			35,300,000	29,200,000	5,200,000
401(k) matching contributions			$ 0	0	0
Number of operating segments | segment			1
Right-of-use assets			$ 5,094,000	8,409,000		$ 11,500,000
Total operating lease liabilities			$ 5,629,000	$ 9,180,000		$ 12,400,000
Operating Lease, Liability, Statement of Financial Position [Extensible List]						Other long-term liabilities
Deferred rent reduction						$ 900,000
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]			Other long-term liabilities	Other long-term liabilities
Minimum
Subsidiary, Sale of Stock [Line Items]
Property and equipment, useful life			3 years
Minimum | Trials
Subsidiary, Sale of Stock [Line Items]
Revenue, performance obligation			8 weeks
Maximum
Subsidiary, Sale of Stock [Line Items]
Property and equipment, useful life			5 years
Maximum | Trials
Subsidiary, Sale of Stock [Line Items]
Revenue, performance obligation			16 weeks
Sales and marketing | C3.ai DTI Grants Program
Subsidiary, Sale of Stock [Line Items]
Contribution expense			$ 0	$ 5,700,000	0
Research and development | C3.ai DTI Grants Program
Subsidiary, Sale of Stock [Line Items]
Contribution expense			$ 2,700,000	$ 5,700,000	$ 0
IPO
Subsidiary, Sale of Stock [Line Items]
Net proceeds received	694,600,000
Private Placement
Subsidiary, Sale of Stock [Line Items]
Net proceeds received	$ 150,000,000
Class A Common Stock
Subsidiary, Sale of Stock [Line Items]
Common stock, shares authorized (in shares) | shares		390,000,000	1,000,000,000	390,000,000
Class A Common Stock | IPO
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued (in shares) | shares	17,825,000
Sale of stock, shares issued, price per share (in dollars per share) | $ / shares	$ 42
Class A Common Stock | Over-Allotment Option
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued (in shares) | shares	2,325,000
Class A Common Stock | Private Placement
Subsidiary, Sale of Stock [Line Items]
Sale of stock, shares issued, price per share (in dollars per share) | $ / shares	$ 42
Class A Common Stock | Private Placement | Spring Creek Capital LLC
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued (in shares) | shares	2,380,952
Class A Common Stock | Private Placement | Microsoft Corporation
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued (in shares) | shares	1,190,476
Redeemable Convertible Class A-1 Common Stock
Subsidiary, Sale of Stock [Line Items]
Shares authorized (in shares) | shares		6,666,667	0	6,666,667
Conversion of stock, converted (in shares) | shares	6,666,665
Conversion ratio	1		1
Class B Common Stock
Subsidiary, Sale of Stock [Line Items]
Common stock, shares authorized (in shares) | shares		21,000,000	3,500,000	21,000,000
Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Shares authorized (in shares) | shares		233,107,379	0	233,107,379
Redeemable Convertible Preferred Stock, Excluding Series A Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Conversion of stock, converted (in shares) | shares	33,628,776
Conversion ratio	1
Series A*
Subsidiary, Sale of Stock [Line Items]
Shares authorized (in shares) | shares				21,000,000
Conversion of stock, converted (in shares) | shares	3,499,992
Conversion ratio	1

Revenue - Disaggregated Revenue

Revenue - Disaggregated Revenue by Geographic Region (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Disaggregation of Revenue [Line Items]
Total revenue	$ 183,217	$ 156,666	$ 91,605
North America
Disaggregation of Revenue [Line Items]
Total revenue	119,795	121,485	61,314
Europe, the Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenue	56,030	33,086	27,629
Asia Pacific
Disaggregation of Revenue [Line Items]
Total revenue	5,992	2,095	2,662
Rest of World
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,400	$ 0	$ 0
United States | Revenue | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Geographic concentration risk, percentage	65.00%	78.00%	66.00%
France | Revenue | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Geographic concentration risk, percentage	12.00%	10.50%	15.00%
Netherlands | Revenue | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Geographic concentration risk, percentage	12.00%

Revenue - Deferred Revenue Bala

Revenue - Deferred Revenue Balance (Details) - USD ($) $ in Thousands		Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Revenue from Contract with Customer [Abstract]
Deferred revenue, current	[1]	$ 72,263	$ 53,537
Deferred revenue, non-current		2,964	6,758
Total deferred revenue		$ 75,227	$ 60,295	$ 91,225
[1]	Including amounts from a related party of $7,697 and $1,499 as of April 30, 2021 and 2020, respectively.

Revenue - Changes in Deferred R

Revenue - Changes in Deferred Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Change In Contract With Customer, Liability [Roll Forward]
Beginning Balance	$ 60,295	$ 91,225
Performance obligations satisfied during the period that were included in the deferred revenue balance at the beginning of the year	(57,542)	(83,093)
Increases due to invoicing prior to satisfaction of performance obligations	72,474	52,163
Ending Balance	$ 75,227	$ 60,295

Revenue - Remaining Performance

Revenue - Remaining Performance Obligation (Details) $ in Thousands	Apr. 30, 2021USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected to be recognized from remaining performance obligations, amount	$ 293,800
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-05-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected to be recognized from remaining performance obligations, amount	$ 145,200
Revenue expected to be recognized from remaining performance obligations, period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-05-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected to be recognized from remaining performance obligations, period

Revenue - Costs to Obtain or Fu

Revenue - Costs to Obtain or Fulfill a Contract (Details) - USD ($)	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Disaggregation of Revenue [Line Items]
Costs to obtain and fulfill a contract, expense	$ 1,200,000	$ 1,000,000	$ 1,100,000
Costs to obtain and fulfill a contract, impairment loss	0	0	$ 0
Prepaid Expenses and Other Current Assets
Disaggregation of Revenue [Line Items]
Costs to obtain and fulfill a contract	3,200,000	900,000
Other Assets
Disaggregation of Revenue [Line Items]
Costs to obtain and fulfill a contract	$ 9,100,000	$ 1,200,000

Revenue - Customer Concentratio

Revenue - Customer Concentration (Details) - Customer Concentration Risk	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Revenue | Customer One
Disaggregation of Revenue [Line Items]
Customer concentration risk, percentage	19.00%	26.00%	14.00%
Revenue | Customer Two
Disaggregation of Revenue [Line Items]
Customer concentration risk, percentage	12.00%	10.00%	12.00%
Accounts Receivable | Customer One
Disaggregation of Revenue [Line Items]
Customer concentration risk, percentage	18.00%	33.00%
Accounts Receivable | Customer Two
Disaggregation of Revenue [Line Items]
Customer concentration risk, percentage	14.00%	19.00%
Accounts Receivable | Customer Three
Disaggregation of Revenue [Line Items]
Customer concentration risk, percentage	14.00%	15.00%
Accounts Receivable | Customer Four
Disaggregation of Revenue [Line Items]
Customer concentration risk, percentage	11.00%

Fair Value Measurements - Asset

Fair Value Measurements - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and available-for-sale marketable securities	$ 1,021,421	$ 223,133
U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	57,998	11,500
Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	422,978	28,477
U.S. government agencies securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0	10,074
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	494,676	94,397
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	2,368	68,425
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and available-for-sale marketable securities	1,021,421	223,133
Fair Value, Recurring | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	43,401	10,260
Fair Value, Recurring | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	57,998	11,500
Fair Value, Recurring | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	422,978	28,477
Fair Value, Recurring | U.S. government agencies securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0	10,074
Fair Value, Recurring | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	494,676	94,397
Fair Value, Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	2,368	68,425
Fair Value, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and available-for-sale marketable securities	43,401	10,260
Fair Value, Recurring | Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	43,401	10,260
Fair Value, Recurring | Level 1 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0	0
Fair Value, Recurring | Level 1 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0	0
Fair Value, Recurring | Level 1 | U.S. government agencies securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0	0
Fair Value, Recurring | Level 1 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0	0
Fair Value, Recurring | Level 1 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0	0
Fair Value, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and available-for-sale marketable securities	978,020	212,873
Fair Value, Recurring | Level 2 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Fair Value, Recurring | Level 2 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	57,998	11,500
Fair Value, Recurring | Level 2 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	422,978	28,477
Fair Value, Recurring | Level 2 | U.S. government agencies securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0	10,074
Fair Value, Recurring | Level 2 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	494,676	94,397
Fair Value, Recurring | Level 2 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	2,368	68,425
Fair Value, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and available-for-sale marketable securities	0	0
Fair Value, Recurring | Level 3 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Fair Value, Recurring | Level 3 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0	0
Fair Value, Recurring | Level 3 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0	0
Fair Value, Recurring | Level 3 | U.S. government agencies securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0	0
Fair Value, Recurring | Level 3 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0	0
Fair Value, Recurring | Level 3 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	$ 0	$ 0

Investments - Cash Equivalents

Investments - Cash Equivalents and Available-for-Sale Marketable Securities (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Debt Securities, Available-for-sale [Line Items]
Cash equivalents	$ 115,355	$ 33,104	$ 98,607
Gross Unrealized Gains	101	425
Gross Unrealized Losses	(20)	0
Total cash equivalents and available-for-sale marketable securities, amortized cost	1,021,340	222,708
Total cash equivalents and available-for-sale marketable securities	1,021,421	223,133
Money market funds
Debt Securities, Available-for-sale [Line Items]
Cash equivalents	43,401	10,260
U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	57,993	11,489
Gross Unrealized Gains	5	11
Gross Unrealized Losses	0	0
Estimated Fair Value	57,998	11,500
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	422,952	28,476
Gross Unrealized Gains	32	1
Gross Unrealized Losses	(6)	0
Estimated Fair Value	422,978	28,477
U.S. government agencies securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	0	9,995
Gross Unrealized Gains	0	79
Gross Unrealized Losses	0	0
Estimated Fair Value	0	10,074
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	494,625	94,242
Gross Unrealized Gains	64	155
Gross Unrealized Losses	(13)	0
Estimated Fair Value	494,676	94,397
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,369	68,246
Gross Unrealized Gains	0	179
Gross Unrealized Losses	(1)	0
Estimated Fair Value	$ 2,368	$ 68,425

Investments - Available-for Sal

Investments - Available-for Sale Marketable Securities by Contractual Maturity (Details) - Debt Securities, Available-For-Sale, Excluding Money Market Accounts - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract]
AFS Marketable Securities Maturities, Within one year, Amortized Cost	$ 977,939	$ 212,449
AFS Marketable Securities Maturities, After one year through five years, Amortized Cost	0	0
Amortized Cost	977,939	212,449
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]
AFS Marketable Securities Maturities, Within one year, Fair Value	978,020	212,873
AFS Marketable Securities Maturities, After one year through five years, Fair Value	0	0
AFS Marketable Securities Maturities, Total Fair Value	$ 978,020	$ 212,873

Investments - Narrative (Detail

Investments - Narrative (Details)	1 Months Ended	12 Months Ended
	Nov. 30, 2020USD ($)	Apr. 30, 2021USD ($)investment	Apr. 30, 2020USD ($)investment	Apr. 30, 2019USD ($)investment
Investments, Debt and Equity Securities [Abstract]
Number of investment positions in unrealized loss position | investment		8	16
Number of investments, other-than-temporary impaired | investment		0	0	0
Other-than-temporary impairment loss		$ 0
Non-marketable equity securities, cost			$ 700,000
Non-marketable equity securities, impairment		0	1,025,000	$ 0
Non-marketable equity securities, proceeds from sale	$ 700,000	$ 725,000	$ 0	$ 0

Balance Sheet Details - Propert

Balance Sheet Details - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 11,536	$ 10,582
Less accumulated depreciation	(5,403)	(1,859)
Property and equipment, net	6,133	8,723
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 8,658	8,215
Computer equipment
Property, Plant and Equipment [Line Items]
Useful Life	36 months
Total property and equipment	$ 2,539	2,028
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Useful Life	60 months
Total property and equipment	$ 339	$ 339

Balance Sheet Details - Narrati

Balance Sheet Details - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Depreciation and amortization expense, related to property and equipment	$ 4	$ 1.2	$ 0.5

Balance Sheet Details - Accrued

Balance Sheet Details - Accrued Compensation and Employee Benefits (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued bonus	$ 12,216	$ 8,356
Accrued vacation	3,935	2,823
Accrued payroll taxes and benefits	3,405	1,397
Accrued commission	1,863	515
Accrued salaries	410	602
Accrued compensation and employee benefits	$ 21,829	$ 13,693

Balance Sheet Details - Accru_2

Balance Sheet Details - Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands		Apr. 30, 2021	Apr. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Liability for common stock exercised prior to vesting		$ 5,331	$ 2,243
Accrued general expenses		3,588	1,466
Operating lease liabilities, current		3,894	3,533
Other		5,505	1,841
Accrued and other current liabilities	[1]	$ 18,318	$ 9,083
[1]	Including amounts from a related party of $3,413 and nil as of April 30, 2021 and 2020, respectively.

Balance Sheet Details - Narra_2

Balance Sheet Details - Narrative, Cares Act Loan (Details) - Paycheck Protection Program, CARES Act - USD ($) $ in Millions	Aug. 18, 2020	May 01, 2020
Short-term Debt [Line Items]
Loan proceeds, promissory note		$ 6.3
Repayment of loan, promissory note, interest	$ 0.1
Repayment of loan, promissory note	$ 6.4

Leases - Components of Lease Co

Leases - Components of Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Leases [Abstract]
Operating lease costs	$ 3,793	$ 3,825
Short term lease costs	1,568	1,324
Variable lease costs	1,589	1,542
Total lease costs	$ 6,950	$ 6,691

Leases -Supplemental Cash Flow

Leases -Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Cash paid for amounts included in the measurement of operating lease liabilities:
Operating cash flows from operating leases	$ 4,031	$ 3,946

Leases - Balance Sheet Informat

Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020	May 01, 2019
Operating leases
Right-of-use assets	$ 5,094	$ 8,409	$ 11,500
Lease liabilities, current	3,894	3,533
Lease liabilities, non-current	1,735	5,647
Total operating lease liabilities	$ 5,629	$ 9,180	$ 12,400
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets, non-current	Other assets, non-current
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long-term liabilities	Other long-term liabilities

Leases - Term and Discount Rate

Leases - Term and Discount Rate Information (Details)	Apr. 30, 2021	Apr. 30, 2020
Operating leases
Weighted average remaining lease term (in months)	1 year 4 months 24 days	2 years 4 months 24 days
Weighted average discount rate	7.30%	7.30%

Leases - Future Minimum Payment

Leases - Future Minimum Payments and Lease Obligations (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020	May 01, 2019
Leases [Abstract]
Fiscal 2022	$ 4,152
Fiscal 2023	1,756
Fiscal 2024	0
Fiscal 2025	0
Fiscal 2026 and thereafter	0
Total future minimum lease payments	5,908
Less: Imputed interest	(279)
Total operating lease liabilities	$ 5,629	$ 9,180	$ 12,400

Commitment and Contingencies (D

Commitment and Contingencies (Details) - USD ($)	1 Months Ended		12 Months Ended
	Feb. 29, 2020	Nov. 30, 2019	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Long-term Purchase Commitment [Line Items]
Purchase commitment, incurred cost			$ 14,300,000	$ 4,400,000	$ 3,400,000
Blattman et al. v. Siebel et al. | Pending Litigation
Long-term Purchase Commitment [Line Items]
Loss contingency, damages sought	$ 2,500,000
C3.ai DTI Grants Program
Long-term Purchase Commitment [Line Items]
Grants, payment period	5 years
Grants, potential remaining contributions			$ 43,100,000	$ 45,800,000
Web-Hosting Services, November 2019-November 2022
Long-term Purchase Commitment [Line Items]
Purchase commitment		$ 30,000,000
Purchase commitment, term		3 years
Web-Hosting Services, November 2020
Long-term Purchase Commitment [Line Items]
Purchase commitment		$ 10,000,000
Web-Hosting Services, November 2021
Long-term Purchase Commitment [Line Items]
Purchase commitment		10,000,000
Web-Hosting Services, November 2022
Long-term Purchase Commitment [Line Items]
Purchase commitment		$ 10,000,000

Redeemable Convertible Prefer_3

Redeemable Convertible Preferred Stock and Redeemable Convertible A-1 Common Stock - Narrative (Details)	1 Months Ended			3 Months Ended		12 Months Ended
	Dec. 31, 2020shares	Aug. 31, 2019USD ($)$ / sharesshares	Jun. 30, 2019USD ($)$ / sharesshares	Apr. 30, 2021USD ($)$ / sharesshares	Apr. 30, 2019USD ($)$ / sharesshares	Apr. 30, 2021USD ($)vote$ / sharesshares	Apr. 30, 2020USD ($)shares	Apr. 30, 2019USD ($)$ / sharesshares	Apr. 30, 2018shares
Temporary Equity [Line Items]
Shares issued, issuance cost | $						$ 7,179,000	$ 0	$ 0
Dividend rate						6.00%
Dividends, declared | $						$ 0	$ 0	$ 0
Redeemable Convertible Preferred Stock, Excluding Series A Preferred Stock
Temporary Equity [Line Items]
Conversion of stock, converted (in shares) | shares	33,628,776
Conversion ratio	1
Series A*
Temporary Equity [Line Items]
Conversion of stock, converted (in shares) | shares	3,499,992
Conversion ratio	1
Shares outstanding (in shares) | shares							3,499,992
Initial conversion price (in dollars per share)				$ 1.998	$ 1.998	$ 1.998		$ 1.998
Liquidation preference, price per share (in dollars per share)				$ 1.998		$ 1.998
Voting rights, votes per share | vote						50
Redeemable Convertible Preferred Stock
Temporary Equity [Line Items]
Carrying value reclassified into stockholders' equity | $				$ 399,800,000		$ 399,753,000
Shares outstanding (in shares) | shares				0	34,192,000	0	37,128,768	34,192,000	31,582,000
Redeemable Convertible A-1 Common Stock
Temporary Equity [Line Items]
Conversion of stock, converted (in shares) | shares	6,666,665
Conversion ratio	1					1
Carrying value reclassified into stockholders' equity | $				$ 18,800,000		$ 18,800,000
Shares outstanding (in shares) | shares				0	6,667,000	0	6,666,665	6,667,000	6,667,000
Liquidation preference, price per share (in dollars per share)				$ 2.82		$ 2.82
Series G
Temporary Equity [Line Items]
Shares outstanding (in shares) | shares							3,893,701
Sale of stock, number of shares issued (in shares) | shares			1,283,325		2,610,376
Sale of stock, shares issued, price per share (in dollars per share)			$ 19.8252		$ 19.8252			$ 19.8252
Proceeds from issuance of stock, net of issuance costs | $			$ 25,400,000		$ 51,500,000	$ 0	$ 25,333,000	$ 51,567,000
Shares issued, issuance cost | $			$ 100,000		$ 300,000		$ 34,000	$ 257,000
Initial conversion price (in dollars per share)				19.8252	$ 19.8252	$ 19.8252		$ 19.8252
Liquidation preference, price per share (in dollars per share)				19.8252		19.8252
Liquidation preference, after initial distribution, price per share threshold (in dollars per share)				29.7378		$ 29.7378
Series H
Temporary Equity [Line Items]
Shares outstanding (in shares) | shares							1,653,928
Sale of stock, number of shares issued (in shares) | shares		1,653,928
Sale of stock, shares issued, price per share (in dollars per share)		$ 30.2310
Proceeds from issuance of stock, net of issuance costs | $		$ 49,800,000				$ 0	$ 49,836,000	$ 0
Shares issued, issuance cost | $		$ 200,000					$ 164,000
Initial conversion price (in dollars per share)				30.231	30.231	$ 30.231		$ 30.231
Liquidation preference, price per share (in dollars per share)				30.231		30.231
Liquidation preference, after initial distribution, price per share threshold (in dollars per share)				$ 45.3468		$ 45.3468
Class B Common Stock
Temporary Equity [Line Items]
Terms of conversion, per share offering price as a multiple of outstanding shares, proceeds (not less than) | $				$ 50,000,000		$ 50,000,000
Terms of conversion, gross cash proceeds (at least) | $				30,000,000		30,000,000
Class A Common Stock
Temporary Equity [Line Items]
Terms of conversion, gross cash proceeds (at least) | $				$ 75,000,000		$ 75,000,000
Terms of conversion, share price (not less than) (in dollars per share)				$ 8.4426		$ 8.4426
Series B*
Temporary Equity [Line Items]
Shares outstanding (in shares) | shares							4,559,999
Initial conversion price (in dollars per share)				1.998	1.998	1.998		1.998
Liquidation preference, price per share (in dollars per share)				1.998		1.998
Series B-1A*
Temporary Equity [Line Items]
Shares outstanding (in shares) | shares							2,430,635
Initial conversion price (in dollars per share)				6.522	6.522	6.522		6.522
Liquidation preference, price per share (in dollars per share)				6.522		6.522
Series B-1B*
Temporary Equity [Line Items]
Shares outstanding (in shares) | shares							92,769
Initial conversion price (in dollars per share)				13.038	13.038	13.038		13.038
Liquidation preference, price per share (in dollars per share)				13.038		13.038
Series C*
Temporary Equity [Line Items]
Shares outstanding (in shares) | shares							2,779,738
Initial conversion price (in dollars per share)				6.84	6.84	6.84		6.84
Liquidation preference, price per share (in dollars per share)				6.84		6.84
Series D
Temporary Equity [Line Items]
Shares outstanding (in shares) | shares							12,278,422
Initial conversion price (in dollars per share)				8.442	8.4426	8.442		8.4426
Liquidation preference, price per share (in dollars per share)				8.4426		8.4426
Liquidation preference, after initial distribution, price per share threshold (in dollars per share)				12.6642		12.6642
Series E
Temporary Equity [Line Items]
Shares outstanding (in shares) | shares							540,003
Initial conversion price (in dollars per share)				21.858	21.8574	21.858		21.8574
Liquidation preference, price per share (in dollars per share)				21.8574		21.8574
Series F
Temporary Equity [Line Items]
Shares outstanding (in shares) | shares							5,399,581
Initial conversion price (in dollars per share)				19.608	$ 19.6068	19.608		$ 19.6068
Liquidation preference, price per share (in dollars per share)				19.6068		19.6068
Liquidation preference, after initial distribution, price per share threshold (in dollars per share)				29.4102		29.4102
Common Stock
Temporary Equity [Line Items]
Minimum share price to avoid conversion adjustment (in dollars per share)				$ 29.4102		$ 29.4102
Series E or Ratchet Preferred
Temporary Equity [Line Items]
Conversion price, adjustment criteria, percent (less than)				1.00%		1.00%

Redeemable Convertible Prefer_4

Redeemable Convertible Preferred Stock and Redeemable Convertible A-1 Common Stock - Stock Outstanding (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Nov. 30, 2020	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2018
Series A*
Temporary Equity [Line Items]
Shares, Authorized (in shares)			21,000,000
Shares, Outstanding (in shares)			3,499,992
Liquidation Amount			$ 7,000
Carrying Value			$ 7,000
Series B*
Temporary Equity [Line Items]
Shares, Authorized (in shares)			27,360,000
Shares, Outstanding (in shares)			4,559,999
Liquidation Amount			$ 9,120
Carrying Value			$ 9,120
Series B-1A*
Temporary Equity [Line Items]
Shares, Authorized (in shares)			14,583,945
Shares, Outstanding (in shares)			2,430,635
Liquidation Amount			$ 15,853
Carrying Value			$ 15,717
Series B-1B*
Temporary Equity [Line Items]
Shares, Authorized (in shares)			556,680
Shares, Outstanding (in shares)			92,769
Liquidation Amount			$ 1,210
Carrying Value			$ 1,210
Series C*
Temporary Equity [Line Items]
Shares, Authorized (in shares)			16,678,511
Shares, Outstanding (in shares)			2,779,738
Liquidation Amount			$ 19,014
Carrying Value			$ 18,980
Series D
Temporary Equity [Line Items]
Shares, Authorized (in shares)			73,670,824
Shares, Outstanding (in shares)			12,278,422
Liquidation Amount			$ 103,662
Carrying Value			$ 103,531
Series E
Temporary Equity [Line Items]
Shares, Authorized (in shares)			3,240,060
Shares, Outstanding (in shares)			540,003
Liquidation Amount			$ 11,803
Carrying Value			$ 11,756
Series F
Temporary Equity [Line Items]
Shares, Authorized (in shares)			42,701,251
Shares, Outstanding (in shares)			5,399,581
Liquidation Amount			$ 81,322
Carrying Value			$ 81,157
Series G
Temporary Equity [Line Items]
Shares, Authorized (in shares)			23,392,520
Shares, Outstanding (in shares)			3,893,701
Liquidation Amount			$ 77,194
Carrying Value			$ 76,900
Series H
Temporary Equity [Line Items]
Shares, Authorized (in shares)			9,923,588
Shares, Outstanding (in shares)			1,653,928
Liquidation Amount			$ 50,000
Carrying Value			$ 49,836
Class A-1 common stock
Temporary Equity [Line Items]
Shares, Authorized (in shares)	0	6,666,667	6,666,667
Shares, Outstanding (in shares)	0		6,666,665	6,667,000	6,667,000
Liquidation Amount			$ 18,800
Carrying Value	$ 0		$ 18,800	$ 18,800	$ 18,800
Redeemable Convertible Preferred Stock
Temporary Equity [Line Items]
Shares, Authorized (in shares)	0	233,107,379	233,107,379
Shares, Outstanding (in shares)	0		37,128,768	34,192,000	31,582,000
Liquidation Amount			$ 376,178
Carrying Value	$ 0		$ 375,207	$ 299,965	$ 248,471

Stockholders' Equity (Details)

Stockholders' Equity (Details) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Oct. 31, 2019USD ($)$ / sharesshares	Apr. 30, 2021USD ($)vote$ / sharesshares	Apr. 30, 2020USD ($)$ / sharesshares	Apr. 30, 2019USD ($)	Nov. 30, 2020shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares authorized (in shares)		200,000,000
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.001
Preferred stock, shares issued (in shares)		0
Preferred stock, shares outstanding (in shares)		0
Automatic conversion period, following the death or incapacity of Mr. Siebel		6 months
Automatic conversion period, following the date Mr. Siebel no longer providing services		6 months
Automatic conversion, anniversary period, if circumstances met		20 years
Net proceeds common stock exercised prior to vesting | $		$ 6,000	$ 1,900	$ 1,100
Liability for common stock exercised prior to vesting | $		$ 5,331	2,243
Stock repurchased in period, per share (in dollars per share) | $ / shares	$ 30.2310
Net transaction price | $	$ 28,500		$ 3,548
Compensation expense | $	$ 24,900
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares subject to repurchase right (in shares)		1,091,306	663,763
Stock repurchased in period (in shares)	811,189
Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)		1,000,000,000	390,000,000		390,000,000
Voting rights, number of votes for each share | vote		1
Common stock, par value (in dollars per share) | $ / shares		$ 0.001	$ 0.001
Stock repurchased in period (in shares)	163,685
Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)		3,500,000	21,000,000		21,000,000
Voting rights, number of votes for each share | vote		50
Common stock, par value (in dollars per share) | $ / shares		$ 0.001	$ 0.001

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - USD ($)	1 Months Ended		12 Months Ended
	Sep. 30, 2020	Jan. 31, 2018	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019	Nov. 27, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant date fair value for options granted (in dollars per share)			$ 6.17
Stock options exercised, total intrinsic value			$ 137,300,000
Stock options vested, total grant date fair value			15,000,000
Stock-based compensation expense			21,740,000	$ 8,310,000	$ 4,267,000
Chief Executive Officer (CEO)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Notes receivable		$ 24,500,000
Proceeds from notes receivable payment	$ 26,000,000
Chief Executive Officer (CEO) | Notes Receivable
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Interest income	$ 0
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost			$ 97,800,000
Unrecognized compensation cost, weighted-average recognition period			3 years 9 months 18 days
Vesting period			5 years
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, weighted-average recognition period			4 years 9 months 18 days
Vesting period			5 years
Stock-based compensation expense			$ 1,000,000
Unrecognized stock-based compensation expense, non-options			$ 32,200,000
2020 Incentive Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period			10 years
2020 Employee Stock Purchase Plan | Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of employee earnings participation (not exceeding)						15.00%
Class A Common Stock | 2020 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares)						67,535,205
Class A Common Stock | 2020 Employee Stock Purchase Plan | Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares)						3,000,000
Series F Preferred Stock | Chief Executive Officer (CEO)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period (in shares)		1,251,921

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Number of Stock Options Outstanding
Balance at beginning of period (in shares)	32,877	23,372
Options granted (in shares)	14,504	16,619
Options exercised (in shares)	(5,799)	(1,809)
Options cancelled (in shares)	(3,095)	(5,305)
Balance at end of period (in shares)	38,487	32,877	23,372
Vested and exercisable at end of period (in shares)	13,290
Vested and expected to vest at end of period (in shares)	39,578
Weighted Average Exercise Price
Balance at beginning of period (in dollars per share)	$ 3.48	$ 2.46
Options granted (in dollars per share)	11.50	4.86
Options exercised (in dollars per share)	2.90	2.34
Options cancelled (in dollars per share)	5.89	3.84
Balance at end of period (in dollars per share)	6.39	$ 3.48	$ 2.46
Vested and exercisable at end of period (in dollars per share)	3.35
Vested and expected to vest at end of period (in dollars per share)	$ 6.35
Weighted Average Remaining Contractual Life (years)
Balance at beginning of period	7 years 11 months 23 days	8 years 10 days	7 years 11 months 23 days
Balance at end of period	7 years 11 months 23 days	8 years 10 days	7 years 11 months 23 days
Vested and exercisable at end of period	6 years 6 months 18 days
Vested and expected to vest at end of period	7 years 11 months 23 days
Aggregate Intrinsic Value
Balance at beginning of period	$ 2,304,714	$ 116,962	$ 50,679
Balance at end of period	2,304,714	$ 116,962	$ 50,679
Vested and exercisable at end of period	835,990
Vested and expected to vest at end of period	$ 2,371,708

Stock-Based Compensation - Valu

Stock-Based Compensation - Valuation Assumptions (Details)	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Share-based Payment Arrangement [Abstract]
Expected dividend yield	0.00%	0.00%
Expected volatility	43.80%	38.60%
Expected term (years)	6 years 3 months 18 days	6 years 3 months 18 days
Risk-free interest rate	0.40%	1.70%

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock Unit Activity (Details) - RSUs - $ / shares	7 Months Ended	12 Months Ended
	Dec. 10, 2020	Apr. 30, 2021
Number of RSUs
Unvested Balance at beginning of period (in shares)	0	0
RSUs granted (in shares)	0	447,000
RSUs vested (in shares)		0
RSUs forfeited (in shares)		0
Unvested Balance at end of period (in shares)		447,000
Weighted Average Grant Date Fair Value Per Share
Unvested Balance at beginning of period (in dollars per share)	$ 0	$ 0
RSUs granted (in dollars per share)		74.52
RSUs vested (in dollars per share)		0
RSUs forfeited (in dollars per share)		0
Unvested Balance at end of period (in dollars per share)		$ 74.52

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 21,740	$ 8,310	$ 4,267
Cost of revenue | Subscription
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	828	370	149
Cost of revenue | Professional services
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	376	122	69
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	9,080	3,074	1,739
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	2,950	1,223	781
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 8,506	$ 3,521	$ 1,529

Income Taxes - Components of Ne

Income Taxes - Components of Net Loss, Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Income Tax Disclosure [Abstract]
Domestic	$ (58,407)	$ (69,887)	$ (33,868)
Foreign	3,415	889	788
Net loss before provision for income taxes	$ (54,992)	$ (68,998)	$ (33,080)

Income Taxes - Provision for In

Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Current expense
Federal	$ 0	$ 0	$ 0
State	286	113	2
Foreign	418	267	264
Total	704	380	266
Deferred expense
Federal	0	0	0
State	0	0	0
Foreign	0	0	0
Total	0	0	0
Provision for income taxes	$ 704	$ 380	$ 266

Income Taxes - Effective Tax Ra

Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Income Tax Disclosure [Abstract]
Expected benefit at federal statutory rate	$ (11,628)	$ (14,489)	$ (6,947)
State tax expense—net of federal benefit	286	113	2
Impact of foreign operations	(299)	85	306
Federal research and development credit	(694)	(530)	(389)
Change in valuation allowance	30,587	14,837	6,587
Stock-based compensation	(17,667)	(23)	337
Meals and entertainment	35	242	207
Other permanent items	84	145	163
Provision for income taxes	$ 704	$ 380	$ 266

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Deferred tax assets
Accrued payroll	$ 889	$ 2,081
Other accruals & reserves	4,053	3,174
Operating lease liability	1,323	2,235
Deferred revenue	1,258	2,959
Depreciation	1,588	1,365
Net operating losses	73,189	40,242
R&D tax credit	4,778	3,617
Stock based compensation	3,690	2,628
Other	327
Other		(7)
Gross deferred tax assets	91,095	58,294
Valuation allowance	(88,015)	(55,812)
Total deferred tax assets	3,080	2,482
Deferred tax liabilities
Prepaid expenses	(1,883)	(436)
Operating lease right-of-use assets	(1,197)	(2,046)
Total deferred tax liabilities	(3,080)	(2,482)
Net deferred tax assets (liabilities)	$ 0	$ 0

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Tax Credit Carryforward [Line Items]
Deferred tax assets, valuation allowance	$ 88,015,000	$ 55,812,000
Deferred tax assets, increase in valuation allowance	32,200,000
Unrecognized tax benefits, if recognized, would impact effective income tax rate	0
Unrecognized tax benefits, cumulative interest and penalties	0	0
Unrecognized tax benefits, anticipated significant change over the next 12 months	0
Federal
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards	308,300,000	168,600,000
Tax credit carryforwards, subject to expiration	1,000,000
Federal | Research Tax Credit Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	5,400,000
Federal | Charitable Contribution Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	14,300,000
State
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards	139,700,000	$ 73,200,000
Tax credit carryforwards, subject to expiration	400,000
State | Research Tax Credit Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 5,300,000

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance as of May 1	$ 4,048	$ 3,037
Increases for tax positions related to the current year	1,285	1,011
Balance as of April 30	$ 5,333	$ 4,048

Net Loss Per Share Attributab_3

Net Loss Per Share Attributable to Common Stockholders - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Numerator
Net loss attributable to common stockholders	$ (55,696)	$ (69,378)	$ (33,346)
Class A Common Stock
Denominator
Basic and diluted weighted-average shares outstanding (in shares)	56,677,947	29,133,157	18,662,237
Basic and diluted net loss per share attributable to common stockholders
Basic and diluted net loss per share (in dollars per share)	$ (0.90)	$ (1.94)	$ (1.32)
Class A-1 common stock
Denominator
Basic and diluted weighted-average shares outstanding (in shares)	6,666,665	6,666,665	6,666,665
Basic and diluted net loss per share attributable to common stockholders
Basic and diluted net loss per share (in dollars per share)	$ (0.55)	$ (1.94)	$ (1.32)
Class B Common Stock
Denominator
Basic and diluted weighted-average shares outstanding (in shares)	3,499,992	0	0
Basic and diluted net loss per share attributable to common stockholders
Basic and diluted net loss per share (in dollars per share)	$ (0.35)	$ 0	$ 0

Net Loss Per Share Attributab_4

Net Loss Per Share Attributable to Common Stockholders - Potential Shares Excluded From Computation of Diluted Net Loss Per Share (Details) - shares	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Series A*
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive shares excluded from computation of net loss per share (in shares)	0	3,499,992	3,499,992
Series B*
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive shares excluded from computation of net loss per share (in shares)	0	4,559,999	4,559,999
Series B-1A*
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive shares excluded from computation of net loss per share (in shares)	0	2,430,635	2,430,635
Series B-1B*
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive shares excluded from computation of net loss per share (in shares)	0	92,769	92,769
Series C*
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive shares excluded from computation of net loss per share (in shares)	0	2,779,738	2,779,738
Series D
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive shares excluded from computation of net loss per share (in shares)	0	12,278,422	12,278,422
Series E
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive shares excluded from computation of net loss per share (in shares)	0	540,003	540,003
Series F
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive shares excluded from computation of net loss per share (in shares)	0	5,399,581	5,399,581
Series G
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive shares excluded from computation of net loss per share (in shares)	0	3,893,701	2,610,376
Series H
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive shares excluded from computation of net loss per share (in shares)	0	1,653,928	0
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive shares excluded from computation of net loss per share (in shares)	39,577,809	33,533,380	23,821,538
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive shares excluded from computation of net loss per share (in shares)	447,095	0	0

Related Party Transactions - Na

Related Party Transactions - Narrative (Details)		1 Months Ended					12 Months Ended
		Sep. 30, 2020USD ($)	Jun. 30, 2020	Oct. 31, 2019USD ($)transaction$ / sharesshares	Jun. 30, 2019USD ($)	Jan. 31, 2018USD ($)renewalPeriodshares	Apr. 30, 2021USD ($)	Apr. 30, 2020USD ($)	Apr. 30, 2019USD ($)
Related Party Transaction [Line Items]
Stock repurchased in period, per share (in dollars per share) | $ / shares				$ 30.2310
Deferred costs, sales commissions, amortization period							5 years
Deferred costs, sales commissions							$ 75,227,000	$ 60,295,000	$ 91,225,000
Accounts receivable, net, from related party							15,180,000	250,000
Deferred revenue, current	[1]						72,263,000	53,537,000
Accounts payable, from related party							56,000	0
Software Subscription Agreement | Baker Hughes Company
Related Party Transaction [Line Items]
Revenue commitment, fiscal year 2020					$ 46,700,000
Revenue commitment, fiscal year 2021					53,300,000
Revenue commitment, fiscal year 2022					75,000,000
Revenue commitment, fiscal year 2023					125,000,000
Revenue commitment, fiscal year 2024					$ 150,000,000
Chief Executive Officer (CEO)
Related Party Transaction [Line Items]
Notes receivable						$ 24,500,000
Notes receivable, term						5 years
Notes receivable, number of renewal periods | renewalPeriod						4
Notes receivable, renewal period						1 year
Interest rate						2.18%
Proceeds from notes receivable payment		$ 26,000,000
Chief Executive Officer (CEO) | Secondary Stock Sale to Existing Shareholder
Related Party Transaction [Line Items]
Number of secondary transactions | transaction				2
Total proceeds				$ 50,000,000
Officers and Employees
Related Party Transaction [Line Items]
Stock repurchased in period, per share (in dollars per share) | $ / shares				$ 30.2310
Baker Hughes Company | Software Subscription Agreement
Related Party Transaction [Line Items]
Revenue commitment, term			5 years		3 years
Related party revenue							55,900,000
Sales commissions, recognized as deferred costs							$ 8,300,000
Deferred costs, sales commissions, amortization period							5 years
Deferred costs, sales commissions, prepaid expense and other current assets							$ 1,700,000
Deferred costs, sales commissions, prepaid expense and other noncurrent assets							6,600,000
Deferred costs, sales commissions, term					3 years
Due to related parties, current							3,400,000
Due to related parties, noncurrent							4,900,000
Deferred costs, sales commissions								0	0
Accounts receivable, net, from related party							15,200,000	300,000
Deferred revenue, current							7,700,000	1,500,000
Costs of subscription revenue							100,000	0	0
Accounts payable, from related party							100,000	0
Baker Hughes Company | Software Subscription Agreement | Subscription
Related Party Transaction [Line Items]
Related party revenue							30,600,000	40,400,000	100,000
Baker Hughes Company | Software Subscription Agreement | Professional services
Related Party Transaction [Line Items]
Related party revenue							$ 4,800,000	$ 300,000	$ 0
Series F Preferred Stock | Chief Executive Officer (CEO)
Related Party Transaction [Line Items]
Stock issued during period (in shares) | shares						1,251,921
Series D Preferred Stock | Chief Executive Officer (CEO) | Secondary Stock Sale to Existing Shareholder | Existing Stockholder, Transaction One
Related Party Transaction [Line Items]
Sale of stock, number of shares (in shares) | shares				1,685,979
Sale of stock, shares issued, price per share (in dollars per share) | $ / shares				$ 26.6034
Series D Preferred Stock | Chief Executive Officer (CEO) | Secondary Stock Sale to Existing Shareholder | Existing Stockholder, Transaction Two
Related Party Transaction [Line Items]
Sale of stock, number of shares (in shares) | shares				825,012
Sale of stock, shares issued, price per share (in dollars per share) | $ / shares				$ 24
Series E Preferred Stock | Chief Executive Officer (CEO) | Secondary Stock Sale to Existing Shareholder | Existing Stockholder, Transaction One
Related Party Transaction [Line Items]
Sale of stock, number of shares (in shares) | shares				193,489
Sale of stock, shares issued, price per share (in dollars per share) | $ / shares				$ 26.6034
Series C Preferred Stock | Chief Executive Officer (CEO) | Secondary Stock Sale to Existing Shareholder | Existing Stockholder, Transaction Two
Related Party Transaction [Line Items]
Sale of stock, number of shares (in shares) | shares				584,795
Sale of stock, shares issued, price per share (in dollars per share) | $ / shares				$ 24
Redeemable Convertible A-1 Common Stock | Chief Executive Officer (CEO) | Secondary Stock Sale to Existing Shareholder | Existing Stockholder, Transaction Two
Related Party Transaction [Line Items]
Sale of stock, number of shares (in shares) | shares				673,526
Sale of stock, shares issued, price per share (in dollars per share) | $ / shares				$ 24
[1]	Including amounts from a related party of $7,697 and $1,499 as of April 30, 2021 and 2020, respectively.

Uncategorized Items - ai-202104

Label	Element	Value
Accounting Standards Update [Extensible List]	us-gaap_AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201609Member