MongoDB (MDB) 10-Q 8 Dec 21 2022 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Oct. 31, 2021	Dec. 06, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Oct. 31, 2021
Document Transition Report	false
Entity File Number	001-38240
Entity Registrant Name	MONGODB, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-1463205
Entity Address, Address Line One	1633 Broadway,
Entity Address, Address Line Two	38th Floor
Entity Address, City or Town	New York,
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10019
City Area Code	646
Local Phone Number	727-4092
Title of 12(b) Security	Class A Common Stock, par value $0.001 per share
Trading Symbol	MDB
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		66,753,105
Entity Central Index Key	0001441816
Current Fiscal Year End Date	--01-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Current assets:
Cash and cash equivalents	$ 748,140	$ 429,697
Short-term investments	1,054,746	528,045
Accounts receivable, net of allowance for doubtful accounts of $4,996 and $6,024 as of October 31, 2021 and January 31, 2021, respectively	182,701	135,176
Deferred commissions	49,537	36,619
Prepaid expenses and other current assets	19,446	12,350
Total current assets	2,054,570	1,141,887
Property and equipment, net	61,797	62,364
Operating lease right-of-use assets	42,291	34,587
Goodwill	57,775	55,830
Acquired intangible assets, net	22,903	26,275
Deferred tax assets	2,170	997
Other assets	110,106	85,555
Total assets	2,351,612	1,407,495
Current liabilities:
Accounts payable	5,237	4,144
Accrued compensation and benefits	93,951	70,210
Operating lease liabilities	7,298	2,343
Other accrued liabilities	46,472	56,440
Deferred revenue	279,241	221,404
Total current liabilities	432,199	354,541
Deferred tax liability, non-current	128	773
Operating lease liabilities, non-current	41,072	39,095
Deferred revenue, non-current	18,704	16,547
Convertible senior notes, net	1,135,684	937,729
Other liabilities, non-current	60,920	59,129
Total liabilities	1,688,707	1,407,814
Commitments and contingencies (Note 7)
Temporary equity, convertible senior notes	0	4,714
Stockholders’ equity (deficit):
Additional paid-in capital	1,770,635	932,332
Treasury stock, 99,371 shares (repurchased at an average of $13.27 per share) as of October 31, 2021 and January 31, 2021	(1,319)	(1,319)
Accumulated other comprehensive loss	(1,292)	(704)
Accumulated deficit	(1,105,186)	(935,403)
Total stockholders’ equity (deficit)	662,905	(5,033)
Total liabilities, temporary equity and stockholders’ equity (deficit)	2,351,612	1,407,495
Class A Common Stock
Stockholders’ equity (deficit):
Class A common stock, par value of $0.001 per share; 1,000,000,000 shares authorized as of October 31, 2021 and January 31, 2021; 66,816,084 shares issued and 66,716,713 shares outstanding as of October 31, 2021; 60,997,822 shares issued and 60,898,451 shares outstanding as of January 31, 2021	$ 67	$ 61

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Oct. 31, 2021	Jan. 31, 2021
Current assets:
Allowance for doubtful accounts	$ 4,996	$ 6,024
Stockholders’ equity (deficit):
Common stock outstanding (in shares)		60,898,451
Treasury stock (in shares)	99,371	99,371
Average repurchase price of treasury stock shares (in dollars per share)	$ 13.27	$ 13.27
Class A Common Stock
Stockholders’ equity (deficit):
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock authorized (in shares)	1,000,000,000	1,000,000,000
Common stock issued (in shares)	66,816,084	60,997,822
Common stock outstanding (in shares)	66,716,713

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Revenue:
Total revenue	$ 226,893	$ 150,771	$ 607,288	$ 419,381
Cost of revenue:
Total cost of revenue	68,464	46,110	183,694	126,091
Gross profit	158,429	104,661	423,594	293,290
Operating expenses:
Sales and marketing	120,360	83,214	327,627	227,417
Research and development	82,256	54,363	219,403	149,250
General and administrative	32,581	25,175	87,309	66,534
Total operating expenses	235,197	162,752	634,339	443,201
Loss from operations	(76,768)	(58,091)	(210,745)	(149,911)
Other income (expense):
Interest income	204	572	534	4,331
Interest expense	(2,597)	(14,093)	(8,811)	(41,838)
Other income (expense), net	117	(113)	(985)	(1,583)
Loss before provision for income taxes	(79,044)	(71,725)	(220,007)	(189,001)
Provision for income taxes	2,249	926	2,411	2,142
Net loss	$ (81,293)	$ (72,651)	$ (222,418)	$ (191,143)
Net loss per share, basic and diluted (in dollars per share)	$ (1.22)	$ (1.22)	$ (3.49)	$ (3.27)
Weighted-average shares used to compute net loss per share, basic and diluted (in shares)	66,386,379	59,368,167	63,750,884	58,476,521
Subscription
Revenue:
Total revenue	$ 217,871	$ 144,069	$ 583,822	$ 401,403
Cost of revenue:
Total cost of revenue	57,378	38,642	153,735	103,240
Services
Revenue:
Total revenue	9,022	6,702	23,466	17,978
Cost of revenue:
Total cost of revenue	$ 11,086	$ 7,468	$ 29,959	$ 22,851

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (81,293)	$ (72,651)	$ (222,418)	$ (191,143)
Other comprehensive loss, net of tax:
Unrealized gain on available-for-sale securities	(298)	(341)	(350)	(24)
Foreign currency translation adjustment	(714)	(65)	(238)	(538)
Other comprehensive loss	(1,012)	(406)	(588)	(562)
Total comprehensive loss	$ (82,305)	$ (73,057)	$ (223,006)	$ (191,705)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Other Comprehensive Income (Loss)	Accumulated Deficit	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, AdjustmentAdditional Paid-In Capital	Cumulative Effect, Period of Adoption, AdjustmentAccumulated Deficit
Beginning balance (in shares) at Jan. 31, 2020		57,382,543
Beginning balance at Jan. 31, 2020	$ 82,858	$ 57	$ 752,127	$ (1,319)	$ 225	$ (668,232)	$ (227)		$ (227)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		373,394
Stock option exercises	2,995	$ 1	2,994
Repurchase of early exercised options (in shares)		(79)
Vesting of restricted stock units (in shares)		241,569
Vesting of early exercised stock options	42		42
Stock-based compensation	30,567		30,567
Conversion of 2024 convertible senior notes (in shares)		8
Unrealized gain on available-for-sale securities	848				848
Foreign currency translation adjustment	(75)				(75)
Net loss	(53,967)					(53,967)
Ending balance (in shares) at Apr. 30, 2020		57,997,435
Ending balance at Apr. 30, 2020	63,041	$ 58	785,730	(1,319)	998	(722,426)
Beginning balance (in shares) at Jan. 31, 2020		57,382,543
Beginning balance at Jan. 31, 2020	82,858	$ 57	752,127	(1,319)	225	(668,232)	(227)		(227)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Unrealized gain on available-for-sale securities	(24)
Foreign currency translation adjustment	(538)
Net loss	(191,143)
Ending balance (in shares) at Oct. 31, 2020		60,156,153
Ending balance at Oct. 31, 2020	21,804	$ 60	883,002	(1,319)	(337)	(859,602)
Beginning balance (in shares) at Apr. 30, 2020		57,997,435
Beginning balance at Apr. 30, 2020	63,041	$ 58	785,730	(1,319)	998	(722,426)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		471,269
Stock option exercises	4,051	$ 1	4,050
Repurchase of early exercised options (in shares)		(881)
Vesting of restricted stock units (in shares)		305,428
Vesting of early exercised stock options	25		25
Stock-based compensation	37,525		37,525
Issuance of common stock under the Employee Stock Purchase Plan (in shares)		84,482
Issuance of common stock under the Employee Stock Purchase Plan	8,963		8,963
Unrealized gain on available-for-sale securities	(531)				(531)
Foreign currency translation adjustment	(398)				(398)
Net loss	(64,525)					(64,525)
Ending balance (in shares) at Jul. 31, 2020		58,857,733
Ending balance at Jul. 31, 2020	48,151	$ 59	836,293	(1,319)	69	(786,951)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		987,837
Stock option exercises	6,739	$ 1	6,738
Vesting of restricted stock units (in shares)		310,573
Vesting of early exercised stock options	19		19
Stock-based compensation	39,952		39,952
Conversion of 2024 convertible senior notes (in shares)		10
Unrealized gain on available-for-sale securities	(341)				(341)
Foreign currency translation adjustment	(65)				(65)
Net loss	(72,651)					(72,651)
Ending balance (in shares) at Oct. 31, 2020		60,156,153
Ending balance at Oct. 31, 2020	$ 21,804	$ 60	883,002	(1,319)	(337)	(859,602)
Beginning balance (in shares) at Jan. 31, 2021	60,898,451	60,898,451
Beginning balance at Jan. 31, 2021	$ (5,033)	$ 61	932,332	(1,319)	(704)	(935,403)	(256,746)	$ (309,381)	52,635
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		483,787
Stock option exercises	3,540	$ 1	3,539
Vesting of restricted stock units (in shares)		341,939
Vesting of early exercised stock options	10		10
Stock-based compensation	50,914		50,914
Conversion of 2024 convertible senior notes (in shares)		372,096
Conversion of convertible senior notes	2,999		2,999
Unrealized gain on available-for-sale securities	34				34
Foreign currency translation adjustment	(90)				(90)
Net loss	(63,992)					(63,992)
Ending balance (in shares) at Apr. 30, 2021		62,096,273
Ending balance at Apr. 30, 2021	$ (268,364)	$ 62	680,413	(1,319)	(760)	(946,760)
Beginning balance (in shares) at Jan. 31, 2021	60,898,451	60,898,451
Beginning balance at Jan. 31, 2021	$ (5,033)	$ 61	932,332	(1,319)	(704)	(935,403)	$ (256,746)	(309,381)	52,635
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)	986,002
Unrealized gain on available-for-sale securities	$ (350)
Foreign currency translation adjustment	(238)
Net loss	(222,418)
Ending balance (in shares) at Oct. 31, 2021		66,716,713
Ending balance at Oct. 31, 2021	662,905	$ 67	1,770,635	(1,319)	(1,292)	(1,105,186)		309,400	52,600
Beginning balance (in shares) at Apr. 30, 2021		62,096,273
Beginning balance at Apr. 30, 2021	(268,364)	$ 62	680,413	(1,319)	(760)	(946,760)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		282,519
Stock option exercises	2,206	$ 0	2,206
Vesting of restricted stock units (in shares)		362,342
Stock-based compensation	57,705		57,705
Issuance of common stock under the Employee Stock Purchase Plan (in shares)		45,261
Issuance of common stock under the Employee Stock Purchase Plan	12,963		12,963
Conversion of 2024 convertible senior notes (in shares)		844,194
Conversion of convertible senior notes	56,683	$ 1	56,682
Issuance of common stock, net of issuance costs (in shares)		2,500,000
Issuance of common stock, net of issuance costs	889,184	$ 3	889,181
Unrealized gain on available-for-sale securities	(86)				(86)
Foreign currency translation adjustment	566				566
Net loss	(77,133)					(77,133)
Ending balance (in shares) at Jul. 31, 2021		66,130,589
Ending balance at Jul. 31, 2021	673,724	$ 66	1,699,150	(1,319)	(280)	(1,023,893)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		219,696
Stock option exercises	1,848	$ 0	1,848
Vesting of restricted stock units (in shares)		366,226
Vesting of restricted stock units	1	$ 1
Stock-based compensation	69,620		69,620
Conversion of 2024 convertible senior notes (in shares)		202
Conversion of convertible senior notes	17		17
Unrealized gain on available-for-sale securities	(298)				(298)
Foreign currency translation adjustment	(714)				(714)
Net loss	(81,293)					(81,293)
Ending balance (in shares) at Oct. 31, 2021		66,716,713
Ending balance at Oct. 31, 2021	$ 662,905	$ 67	$ 1,770,635	$ (1,319)	$ (1,292)	$ (1,105,186)		$ 309,400	$ 52,600

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Cash flows from operating activities
Net loss	$ (222,418)	$ (191,143)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	9,989	9,515
Stock-based compensation	177,327	108,044
Amortization of debt discount and issuance costs	3,161	36,577
Amortization of finance right-of-use assets	2,981	2,981
Amortization of operating right-of-use assets	5,010	4,747
Deferred income taxes	(2,711)	(88)
Accretion of discount on short-term investments	4,978	383
Unrealized foreign exchange gain (loss)	503	(1,915)
Change in operating assets and liabilities:
Accounts receivable	(46,892)	(4,157)
Prepaid expenses and other current assets	(7,220)	247
Deferred commissions	(34,819)	(17,161)
Other long-term assets	(291)	(117)
Accounts payable	1,127	743
Accrued liabilities	34,138	19,633
Operating lease liabilities	(4,343)	(2,737)
Deferred revenue	58,498	5,765
Other liabilities, non-current	5,651	4,655
Net cash used in operating activities	(15,331)	(24,028)
Cash flows from investing activities
Purchases of property and equipment	(4,516)	(10,942)
Acquisition, net of cash acquired	(4,469)	0
Investment in non-marketable securities	(2,343)	(500)
Proceeds from maturities of marketable securities	400,000	540,000
Purchases of marketable securities	(932,250)	(812,574)
Net cash used in investing activities	(543,578)	(284,016)
Cash flows from financing activities
Payments of issuance costs for convertible senior notes	0	(4,154)
Proceeds from exercise of stock options, including early exercised stock options	7,591	13,798
Proceeds from issuance of common stock, net of issuance costs	889,184	0
Proceeds from the issuance of common stock under the Employee Stock Purchase Plan	12,963	8,963
Repurchase of early exercised stock options	0	(11)
Principal repayments of finance leases	(3,649)	(3,450)
Repayments of convertible senior notes attributable to principal	(27,594)	0
Proceeds from tenant improvement allowance on finance lease	0	856
Net cash provided by financing activities	878,495	16,002
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(1,148)	618
Net increase (decrease) in cash, cash equivalents and restricted cash	318,438	(291,424)
Cash, cash equivalents and restricted cash, beginning of period	430,222	706,706
Cash, cash equivalents and restricted cash, end of period	748,660	415,282
Cash paid during the period for:
Income taxes, net of refunds	3,651	1,145
Interest expense	4,066	4,387
Reconciliation of cash, cash equivalents and restricted cash within the condensed consolidated balance sheets, end of period, to the amounts shown in the statements of cash flows above
Cash and cash equivalents	748,140	414,762
Restricted cash, non-current	520	520
Total cash, cash equivalents and restricted cash	$ 748,660	$ 415,282

Organization and Description of

Organization and Description of Business	9 Months Ended
	Oct. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Description of Business	Organization and Description of Business MongoDB, Inc. (“MongoDB” or the “Company”) was originally incorporated in the state of Delaware in November 2007 under the name 10Gen, Inc. In August 2013, the Company changed its name to MongoDB, Inc. The Company is headquartered in New York City. MongoDB is the leading modern, general purpose database platform. The Company’s robust platform enables developers to build and modernize applications rapidly and cost-effectively across a broad range of use cases. Organizations can deploy the Company’s platform at scale in the cloud, on-premise or in a hybrid environment. In addition to selling its software, the Company provides post-contract support, training and consulting services for its offerings. The Company’s fiscal year ends January 31. 2021 Common Stock Offering On June 29, 2021, the Company entered into an underwriting agreement with Morgan Stanley & Co. LLC and Goldman Sachs & Co. LLC, as representatives of the several underwriters named therein, pursuant to which the Company agreed to issue and sell 2,500,000 shares of its Class A common stock, par value $0.001 per share, at an offering price of $365.00 per share. The Company received net proceeds of $889.2 million, after deducting underwriting discounts and commissions of $22.7 million and offering expenses of $0.6 million. Offering expenses included legal, accounting and other fees and, along with underwriting discounts and commissions, were recorded in additional paid-in capital as a reduction of the proceeds upon the closing of the offering in July 2021.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Oct. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying interim condensed consolidated balance sheet as of October 31, 2021, the interim condensed consolidated statements of stockholders’ equity (deficit) for the three and nine months ended October 31, 2021 and 2020, the interim condensed consolidated statements of operations and of comprehensive loss for the three and nine months ended October 31, 2021 and 2020 and the interim condensed consolidated statements of cash flows for the nine months ended October 31, 2021 and 2020 are unaudited. The interim unaudited condensed consolidated financial statements have been prepared on a basis consistent with the annual consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary to state fairly the Company’s financial position as of October 31, 2021, its statements of stockholders’ equity (deficit) as of October 31, 2021 and 2020, its results of operations and of comprehensive loss for the three and nine months ended October 31, 2021 and 2020 and its statements of cash flows for the nine months ended October 31, 2021 and 2020. The financial data and the other financial information disclosed in the notes to these interim condensed consolidated financial statements related to the three- and nine-month periods are also unaudited. The results of operations for the three and nine months ended October 31, 2021 are not necessarily indicative of the results to be expected for the fiscal year ending January 31, 2022 or for any other future year or interim period. The interim unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and include the accounts of the Company and its wholly owned subsidiaries. All intercompany transactions and accounts have been eliminated. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to the applicable rules and regulations of the Securities and Exchange Commission. The condensed balance sheet data as of January 31, 2021 was derived from the Company’s audited financial statements, but does not include all disclosures required by U.S. GAAP. Therefore, these interim unaudited condensed consolidated financial statements and accompanying footnotes should be read in conjunction with the Company’s annual consolidated financial statements and related footnotes included in its Annual Report on Form 10-K for the fiscal year ended January 31, 2021 (the “2021 Form 10-K”). Use of Estimates The preparation of the interim unaudited condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates, assumptions and judgments that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Such estimates include, but are not limited to, revenue recognition, allowances for doubtful accounts, the incremental borrowing rate related to the Company’s lease liabilities, stock-based compensation, fair value of common stock prior to the initial public offering, legal contingencies, fair value of acquired intangible assets and goodwill, useful lives of acquired intangible assets and property and equipment, fair value of non-marketable securities and accounting for income taxes. The Company bases these estimates on historical and anticipated results, trends and various other assumptions that it believes are reasonable under the circumstances, including assumptions as to future events. The ongoing COVID-19 pandemic has resulted in a global slowdown of economic activity that is likely to continue to decrease demand and supply for a broad variety of goods and services, including demand from the Company’s customers, while also disrupting sales channels and marketing activities for an unknown period of time. Estimates and assumptions about future events and their effects cannot be determined with certainty and therefore require the exercise of judgment. As of the date of issuance of these financial statements, the Company is not aware of any specific event or circumstance that would require the Company to update its estimates, assumptions and judgments or adjust the carrying value of its assets or liabilities. These estimates may change as new events occur and additional information is obtained and are recognized in the consolidated financial statements as soon as they become known. Actual results could differ from those estimates and any such differences may be material to the Company’s financial statements. Significant Accounting Policies There have been no changes to the Company’s significant accounting policies as described in the Company’s 2021 Form 10-K other than as a result of the Company’s adoption of the new accounting guidance related to convertible instruments, effective February 1, 2021, as discussed in “Recently Adopted Accounting Pronouncements—Convertible Senior Notes” below. Recently Adopted Accounting Pronouncements Convertible Senior Notes. In August 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-06— Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity (“ASU 2020-06”). The new standard simplifies the accounting for convertible instruments by eliminating the conversion option separation model for convertible debt that can be settled in cash and by eliminating the measurement model for beneficial conversion features. Convertible instruments that continue to be subject to separation models are (1) those with conversion options that are required to be accounted for as bifurcated derivatives and (2) convertible debt instruments issued with substantial premiums for which the premiums are recorded as paid-in capital. Additionally, among other changes, the new guidance eliminates some of the conditions for equity classification for contracts in an entity’s own equity, thereby making it easier for equity contracts to qualify for the derivative scope exception. The new standard also requires entities to use the if-converted method for all convertible instruments in the diluted earnings per share calculation and include the effect of share settlement for instruments that may be settled in cash or shares, except for certain liability-classified share-based payment awards. The Company early adopted ASU 2020-06 as of February 1, 2021 using the modified retrospective transition method. Upon adoption of ASU 2020-06, the Company is no longer recording the conversion feature of its convertible senior notes in equity. Instead, the Company combined the previously separated equity component with the liability component, which together is now classified as debt, thereby eliminating the subsequent amortization of the debt discount as interest expense. Similarly, the portion of issuance costs previously allocated to equity was reclassified to debt and amortized as interest expense. Accordingly, the Company recorded a decrease to accumulated deficit of $52.6 million, a decrease to additional paid-in capital of $309.4 million, a decrease to temporary equity of $4.7 million and an increase to convertible senior notes, net, of $261.5 million. There was an immaterial benefit from the reversal of the deferred tax liability associated with the convertible senior notes upon the adoption of ASU 2020-06. Prior period financial statements were not restated. Also upon adoption, the Company is no longer utilizing the treasury stock method for earnings per share purposes. Instead, the Company is applying the if-converted method when reporting the number of potentially dilutive shares of common stock. Although the required use of the if-converted method will not impact the diluted net loss per share as long as the Company is in a net loss position, the Company is required to include disclosures of all the underlying shares regardless of the average stock price for the reporting period. The Company’s convertible senior notes are classified as non-current liabilities until the reporting period date is within one year of maturity of the convertible senior notes or when the Company has received a redemption request, but settlement will occur after the reporting period date. Under such circumstances, the carrying amount of the convertible senior notes, net of the associated unamortized debt issuance costs, is classified as a current liability. Income Taxes. In December 2019, the FASB issued ASU 2019-12— Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The amendments in ASU 2019-12 simplify the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application and simplification of GAAP for other areas of Topic 740 by clarifying and amending existing guidance. The Company adopted ASU 2019-12 effective February 1, 2021 and the adoption of this standard did not have a material impact on the Company’s condensed consolidated financial statements.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Oct. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The following tables present information about the Company’s financial assets and liabilities that have been measured at fair value on a recurring basis as of October 31, 2021 and January 31, 2021 and indicate the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands): Fair Value Measurement as of October 31, 2021 Level 1 Level 2 Level 3 Total Financial Assets: Cash and cash equivalents: Money market funds $ 631,924 $ — $ — $ 631,924 Short-term investments: U.S. government treasury securities 1,054,746 — — 1,054,746 Total financial assets $ 1,686,670 $ — $ — $ 1,686,670 Fair Value Measurement as of January 31, 2021 Level 1 Level 2 Level 3 Total Financial Assets: Cash and cash equivalents: Money market funds $ 330,109 $ — $ — $ 330,109 Short-term investments: U.S. government treasury securities 528,045 — — 528,045 Total financial assets $ 858,154 $ — $ — $ 858,154 The Company utilized the market approach and Level 1 valuation inputs to value its money market mutual funds and U.S. government treasury securities because published net asset values were readily available. The contractual maturity of all marketable securities was less than one year as of October 31, 2021 and January 31, 2021. As of October 31, 2021 and January 31, 2021, gross unrealized gains and losses for cash equivalents and short-term investments were not material. Accordingly, the Company concluded that an allowance for credit losses was unnecessary for short-term investments as of October 31, 2021. Gross realized gains and losses were not material for each of the three- and nine-month periods ended October 31, 2021 and 2020. Convertible Senior Notes In addition to its cash, cash equivalents and short-term investments, the Company measures the fair value of its outstanding convertible senior notes on a quarterly basis for disclosure purposes. The Company considers the fair value of its convertible senior notes at October 31, 2021 to be a Level 2 measurement due to limited trading activity of the convertible senior notes. Refer to Note 5, Convertible Senior Notes , for further details. Non-marketable Securities As of October 31, 2021 and January 31, 2021, the total amount of non-marketable equity securities included in other assets on the Company’s condensed consolidated balance sheets was $2.8 million and $0.5 million. During the three and nine months ended October 31, 2021, the Company invested an additional $1.2 million and $2.3 million, respectively, of its cash in non-marketable equity securities. Refer to Note 2, Summary of Significant Accounting Policies , in the Notes to Consolidated Financial Statements included in Part II, Item 8 of the Company’s 2021 Form 10-K for further information. The Company classifies these assets as Level 3 within the fair value hierarchy only if an impairment or observable price changes in orderly transactions are recognized on these non-marketable equity securities during the period. The estimation of fair value for these investments is inherently complex due to the lack of readily available market data and inherent lack of liquidity and requires the Company’s judgment and the use of significant unobservable inputs in an inactive market. In addition, the determination of whether an orderly transaction is for the identical or a similar investment requires significant management judgment, including understanding the differences in the rights and obligations of the investments, the extent to which those differences would affect the fair values of those investments and the stage of operational development of the entities. For the three and nine months ended October 31, 2021, there have been no adjustments to the carrying values of the Company’s non-marketable securities as a result of impairment or observable price changes.

Goodwill and Acquired Intangibl

Goodwill and Acquired Intangible Assets, Net	9 Months Ended
	Oct. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Acquired Intangible Assets, Net	Goodwill and Acquired Intangible Assets, Net In April 2021, the Company made an acquisition for total cash consideration of $9.0 million, of which $4.5 million was the purchase price to be allocated and $4.5 million will be recognized as post-combination compensation expense. For accounting purposes, this business combination was deemed immaterial. The Company allocated $3.4 million to the acquired developed technology intangible asset based on fair value to be amortized over its economic useful life of five years. The Company also recorded $1.9 million of goodwill, which included a tax benefit associated with the acquisition due to the release of the valuation allowance of $0.8 million. The gross carrying amount and accumulated amortization of the Company’s intangible assets are as follows (in thousands): October 31, 2021 Gross Carrying Value Accumulated Amortization Net Book Value Weighted-Average Remaining Useful Life Developed technology $ 38,100 $ (21,447) $ 16,653 2.9 Customer relationships 15,200 (8,950) 6,250 2.1 Total $ 53,300 $ (30,397) $ 22,903 January 31, 2021 Gross Carrying Value Accumulated Amortization Net Book Value Weighted-Average Remaining Useful Life Developed technology $ 34,700 $ (16,955) $ 17,745 3.3 Customer relationships 15,200 (6,670) 8,530 2.8 Total $ 49,900 $ (23,625) $ 26,275 Acquired intangible assets are amortized on a straight-line basis. Amortization expense of intangible assets was $2.3 million and $6.8 million for the three and nine months ended October 31, 2021, respectively, and $2.1 million and $6.4 million for the three and nine months ended October 31, 2020, respectively. Amortization expense for developed technology was included as research and development expense in the Company’s condensed consolidated statements of operations. Amortization expense for customer relationships was included as sales and marketing expense in the Company’s condensed consolidated statements of operations. As of October 31, 2021, future amortization expense related to the intangible assets is as follows (in thousands): Years Ending January 31, Remainder of 2022 $ 2,295 2023 9,180 2024 8,505 2025 2,130 2026 680 2027 113 Total $ 22,903

Convertible Senior Notes

Convertible Senior Notes	9 Months Ended
	Oct. 31, 2021
Debt Disclosure [Abstract]
Convertible Senior Notes	Convertible Senior Notes In June 2018, the Company issued $250.0 million aggregate principal amount of 0.75% convertible senior notes due 2024 in a private placement and, in July 2018, the Company issued an additional $50.0 million aggregate principal amount of convertible senior notes pursuant to the exercise in full of the initial purchasers’ option to purchase additional convertible senior notes (collectively, the “2024 Notes”). The 2024 Notes are senior unsecured obligations of the Company and interest is payable semiannually in arrears on June 15 and December 15 of each year, beginning on December 15, 2018, at a rate of 0.75% per year. The 2024 Notes will mature on June 15, 2024, unless earlier converted, redeemed or repurchased. The total net proceeds from the offering, after deducting initial purchase discounts and debt issuance costs, were approximately $291.1 million. In January 2020, the Company issued $1.0 billion aggregate principal amount of 0.25% convertible senior notes due 2026 in a private placement and, also in January 2020, the Company issued an additional $150.0 million aggregate principal amount of convertible senior notes pursuant to the exercise in full of the initial purchasers’ option to purchase additional convertible senior notes (collectively, the “2026 Notes”). The 2026 Notes are senior unsecured obligations of the Company and interest is payable semiannually in arrears on July 15 and January 15 of each year, beginning on July 15, 2020, at a rate of 0.25% per year. The 2026 Notes will mature on January 15, 2026, unless earlier converted, redeemed or repurchased. The total net proceeds from the offering, after deducting initial purchase discounts and estimated debt issuance costs, were approximately $1.13 billion. On January 14, 2020, in connection with the issuance of the 2026 Notes, the Company used a portion of the net proceeds to repurchase $210.0 million aggregate principal amount of the 2024 Notes (the “2024 Notes Partial Repurchase”) leaving $90.0 million aggregate principal outstanding on the 2024 Notes immediately after the exchange. The 2024 Notes Partial Repurchase were not pursuant to a redemption notice and were individually privately negotiated transactions. The 2024 Notes Partial Repurchase and issuance of the 2026 Notes were deemed to have substantially different terms due to the significant difference between the value of the conversion option immediately prior to and after the exchange, and accordingly, the 2024 Notes Partial Repurchase was accounted for as a debt extinguishment. Refer to Note 6, Convertible Senior Notes , in the Notes to Consolidated Financial Statements included in Part II, Item 8 of the Company’s 2021 Form 10-K for further information on the 2024 Notes, the 2026 Notes and the 2024 Notes Partial Repurchase. On October 1, 2021, the Company issued a notice of redemption (the “Redemption Notice”) for the aggregate principal amount outstanding of its 2024 Notes. Pursuant to the Redemption Notice, on December 3, 2021, the Company redeemed the outstanding principal of the 2024 Notes that were not converted prior to such date at a redemption price in cash equal to 100% of the principal amount of the 2024 Notes, plus accrued and unpaid interest. Approximately $1.9 million aggregate principal amount outstanding as of October 31, 2021 were converted to 27,377 shares of the Company’s Class A common stock with the remaining balance settled in cash. The extinguishment of the 2024 Notes on December 3, 2021 is immaterial to the Company’s financial statements. During the three months ended October 31, 2021, the conditional conversion feature of the 2024 Notes and the 2026 Notes was triggered as the last reported sale price of the Company's Class A common stock was more than or equal to 130% of the applicable conversion price for each of the series of convertible senior notes for at least 20 trading days in the period of 30 consecutive trading days ending on October 31, 2021 (the last trading day of the fiscal quarter) and therefore the 2024 Notes were convertible, in whole or in part, at the option of the holders from November 1, 2021 until their redemption on December 3, 2021, and the 2026 Notes are currently convertible, in whole or in part, at the option of the holders from November 1, 2021 through January 31, 2022. Whether the 2026 Notes will be convertible following such period will depend on the continued satisfaction of this condition or another conversion condition in the future. During the nine months ended October 31, 2021, certain holders elected to redeem $88.1 million of aggregate principal amount of the 2024 Notes and the 2026 Notes. The Company elected to use $27.6 million of cash to settle a portion of the principal upon redemption, with the remainder settled through the issuance of 1,216,492 shares of Class A common stock. The difference between the settlement consideration and the liability component of the redeemed 2024 Notes and 2026 Notes was recorded to additional paid-in capital on the Company’s condensed consolidated balance sheet. Pursuant to the Company’s adoption of ASU 2020-06, there was no gain nor loss recognized upon any conversions of either of the 2024 Notes and 2026 Notes. The Company may continue to elect to repay the 2026 Notes in cash, shares of the Company’s Class A common stock or a combination of both cash and shares with respect to future conversions of the 2026 Notes. The net carrying amounts of the liability component of the 2024 Notes and the 2026 Notes were as follows for the periods presented (in thousands): October 31, 2021 January 31, 2021 2024 Notes 2026 Notes 2024 Notes 2026 Notes Principal $ 1,863 (1) $ 1,149,991 $ 90,000 $ 1,150,000 Unamortized debt discount (2) — — (15,459) (249,907) Unamortized debt issuance costs (25) (14,307) (1,265) (13,174) Net carrying amount (2) $ 1,838 $ 1,135,684 $ 73,276 $ 886,919 (1) The aggregate principal amount outstanding of the 2024 Notes is presented within Other Accrued Liabilities on the Company’s condensed consolidated balance sheet as of October 31, 2021. (2) The net carrying amount was increased on February 1, 2021 as a result of the adoption of ASU 2020-06. Refer to Note 2, Summary of Significant Accounting Policies , in this Quarterly Report on Form 10-Q for further information. As of October 31, 2021, the total estimated fair values (Level 2) of the outstanding 2024 Notes and the 2026 Notes were approximately $9.5 million and $2.8 billion, respectively. The fair values were determined based on the closing trading price per $100 of the 2024 Notes and 2026 Notes as of the last available date of trading. The fair values of the 2024 Notes and 2026 Notes are primarily affected by the trading price of the Company’s Class A common stock and market interest rates. The following table sets forth the interest expense related to the 2024 Notes and 2026 Notes (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2021 2020 2021 2020 2024 Notes 2026 Notes 2024 Notes 2026 Notes 2024 Notes 2026 Notes 2024 Notes 2026 Notes Contractual interest expense $ 4 $ 719 $ 168 $ 718 $ 203 $ 2,156 $ 506 $ 2,156 Amortization of debt discount (1) — — 1,002 10,826 — — 2,958 32,058 Amortization of issuance costs (1) 2 840 70 469 646 2,515 203 1,366 Total (1) $ 6 $ 1,559 $ 1,240 $ 12,013 $ 849 $ 4,671 $ 3,667 $ 35,580 (1) The decrease in total interest expense for the three and nine months ended October 31, 2021 as compared to the respective prior-year periods was due to the derecognition of the unamortized debt discount, partially offset by the increase in the amortization of issuance costs previously recognized in equity. These changes were the result of the Company’s adoption of ASU 2020-06, as of February 1, 2021, as described in Note 2, Summary of Significant Accounting Policies . Capped Calls In connection with the pricing of the 2024 Notes and 2026 Notes, the Company entered into privately negotiated capped call transactions with certain counterparties (the “Capped Calls”). The Capped Calls associated with the 2024 Notes each have an initial strike price of approximately $68.15 per share, subject to certain adjustments, which corresponds to the initial conversion price of the 2024 Notes. These Capped Calls have initial cap prices of $106.90 per share, subject to certain adjustments. The Capped Calls associated with the 2026 Notes each have an initial strike price of approximately $211.20 per share, subject to certain adjustments, which corresponds to the initial conversion price of the 2026 Notes. These Capped Calls have initial cap prices of $296.42 per share, subject to certain adjustments. Refer to Note 6, Convertible Senior Notes , in the Notes to Consolidated Financial Statements included in Part II, Item 8 of the Company’s 2021 Form 10-K for further information on the Capped Calls.

Leases

Leases	9 Months Ended
	Oct. 31, 2021
Leases [Abstract]
Leases	Leases Finance Lease In December 2017, the Company entered into a lease agreement for 106,230 rentable square feet of office space (the “Premises”) to accommodate its growing employee base in New York City. The Company received delivery of the Premises on January 1, 2018 to commence construction to renovate the Premises. Total estimated aggregate base rent payments over the initial 12-year term of the lease are $87.3 million and payments began in July 2019. The Company has the option to extend the term of the lease by an additional 5 years. Operating Leases The Company has entered into non-cancelable operating leases, primarily related to rental of office space expiring through 2032. The Company recognizes operating lease costs on a straight-line basis over the term of the agreement, taking into account adjustments for market provisions such as free or escalating base monthly rental payments or deferred payment terms such as rent holidays that defer the commencement date of the required payments. The Company may receive renewal or expansion options, leasehold improvement allowances or other incentives on certain lease agreements. The Company entered into a new agreement to lease approximately 16,000 square feet of office space in Palo Alto for a term of eight years with one option to extend for an additional five years. The total estimated aggregate base rent payments are $14.2 million with payments beginning four months subsequent to the commencement date, which was April 13, 2021. Lease Costs The components of the Company’s lease costs included in its condensed consolidated statement of operations were as follows (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2021 2020 2021 2020 Finance lease cost: Amortization of finance lease right-of-use assets $ 993 $ 993 $ 2,981 $ 2,981 Interest on finance lease liabilities 785 852 2,406 2,604 Operating lease cost 2,313 2,335 6,481 6,189 Short-term lease cost 431 435 630 1,968 Total lease cost $ 4,522 $ 4,615 $ 12,498 $ 13,742 Balance Sheet Components The balances of the Company’s finance and operating leases were recorded on the condensed consolidated balance sheet as follows (in thousands): October 31, 2021 January 31, 2021 Finance Lease: Property and equipment, net $ 32,457 $ 35,437 Other accrued liabilities (current) 5,111 4,900 Other liabilities, non-current 50,496 54,356 Operating Leases: Operating lease right-of-use assets $ 42,291 $ 34,587 Operating lease liabilities (current) 7,298 2,343 Operating lease liabilities, non-current 41,072 39,095 Supplemental Information The following table presents supplemental information related to the Company’s finance and operating leases (in thousands, except weighted-average information): Nine Months Ended October 31, 2021 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance lease $ 2,406 $ 2,604 Operating cash flows from operating leases 5,909 4,146 Financing cash flows from finance lease 3,649 3,450 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 12,893 $ 30,593 Weighted-average remaining lease term (in years): Finance lease 8.2 9.2 Operating leases 7.4 7.9 Weighted-average discount rate: Finance lease 5.6 % 5.6 % Operating leases 4.3 % 4.6 % Maturities of Lease Liabilities Future minimum lease payments under non-cancelable finance and operating leases on an annual undiscounted cash flow basis as of October 31, 2021 were as follows (in thousands): Year Ending January 31, Finance Lease Operating Leases Remainder of 2022 $ 2,018 $ 1,729 2023 8,073 10,050 2024 8,073 8,759 2025 8,445 7,557 2026 8,711 6,081 Thereafter 34,118 22,604 Total minimum payments 69,438 56,780 Less imputed interest (13,831) (8,410) Present value of future minimum lease payments 55,607 48,370 Less current obligations under leases (5,111) (7,298) Non-current lease obligations $ 50,496 $ 41,072
Leases	Leases Finance Lease In December 2017, the Company entered into a lease agreement for 106,230 rentable square feet of office space (the “Premises”) to accommodate its growing employee base in New York City. The Company received delivery of the Premises on January 1, 2018 to commence construction to renovate the Premises. Total estimated aggregate base rent payments over the initial 12-year term of the lease are $87.3 million and payments began in July 2019. The Company has the option to extend the term of the lease by an additional 5 years. Operating Leases The Company has entered into non-cancelable operating leases, primarily related to rental of office space expiring through 2032. The Company recognizes operating lease costs on a straight-line basis over the term of the agreement, taking into account adjustments for market provisions such as free or escalating base monthly rental payments or deferred payment terms such as rent holidays that defer the commencement date of the required payments. The Company may receive renewal or expansion options, leasehold improvement allowances or other incentives on certain lease agreements. The Company entered into a new agreement to lease approximately 16,000 square feet of office space in Palo Alto for a term of eight years with one option to extend for an additional five years. The total estimated aggregate base rent payments are $14.2 million with payments beginning four months subsequent to the commencement date, which was April 13, 2021. Lease Costs The components of the Company’s lease costs included in its condensed consolidated statement of operations were as follows (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2021 2020 2021 2020 Finance lease cost: Amortization of finance lease right-of-use assets $ 993 $ 993 $ 2,981 $ 2,981 Interest on finance lease liabilities 785 852 2,406 2,604 Operating lease cost 2,313 2,335 6,481 6,189 Short-term lease cost 431 435 630 1,968 Total lease cost $ 4,522 $ 4,615 $ 12,498 $ 13,742 Balance Sheet Components The balances of the Company’s finance and operating leases were recorded on the condensed consolidated balance sheet as follows (in thousands): October 31, 2021 January 31, 2021 Finance Lease: Property and equipment, net $ 32,457 $ 35,437 Other accrued liabilities (current) 5,111 4,900 Other liabilities, non-current 50,496 54,356 Operating Leases: Operating lease right-of-use assets $ 42,291 $ 34,587 Operating lease liabilities (current) 7,298 2,343 Operating lease liabilities, non-current 41,072 39,095 Supplemental Information The following table presents supplemental information related to the Company’s finance and operating leases (in thousands, except weighted-average information): Nine Months Ended October 31, 2021 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance lease $ 2,406 $ 2,604 Operating cash flows from operating leases 5,909 4,146 Financing cash flows from finance lease 3,649 3,450 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 12,893 $ 30,593 Weighted-average remaining lease term (in years): Finance lease 8.2 9.2 Operating leases 7.4 7.9 Weighted-average discount rate: Finance lease 5.6 % 5.6 % Operating leases 4.3 % 4.6 % Maturities of Lease Liabilities Future minimum lease payments under non-cancelable finance and operating leases on an annual undiscounted cash flow basis as of October 31, 2021 were as follows (in thousands): Year Ending January 31, Finance Lease Operating Leases Remainder of 2022 $ 2,018 $ 1,729 2023 8,073 10,050 2024 8,073 8,759 2025 8,445 7,557 2026 8,711 6,081 Thereafter 34,118 22,604 Total minimum payments 69,438 56,780 Less imputed interest (13,831) (8,410) Present value of future minimum lease payments 55,607 48,370 Less current obligations under leases (5,111) (7,298) Non-current lease obligations $ 50,496 $ 41,072

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Oct. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Non-cancelable Material Commitments During the nine months ended October 31, 2021, other than certain non-cancelable operating leases described in Note 6, Leases , there have been no material changes outside the ordinary course of business to the Company’s contractual obligations and commitments from those disclosed in the 2021 Form 10-K. Legal Matters From time to time, the Company has become involved in claims, litigation and other legal matters arising in the ordinary course of business, including intellectual property claims, labor and employment claims and breach of contract claims. For example, on March 12, 2019, Realtime Data LLC (“Realtime”) filed a lawsuit against the Company in the United States District Court for the District of Delaware alleging that the Company is infringing three U.S. patents that it holds: U.S. Patent No. 9,116,908 (the “908 Patent”), U.S. Patent No. 9,667,751 (the “751 Patent”) and U.S. Patent No. 8,933,825 (the “825 Patent”). On May 4, 2021, in a consolidated action that includes Realtime's case against MongoDB, the District Court granted certain defendants' motion to dismiss without prejudice, finding that the Patents are invalid under 35 U.S.C. § 101. Realtime filed an amended complaint against the Company on May 18, 2021, and the Company moved to dismiss that amended complaint on June 29, 2021. On August 23, 2021, the District Court granted the Company's motion to dismiss. On August 25, 2021, Realtime filed a notice of appeal of the Delaware District Court’s order. Realtime’s opening appeal brief was filed on December 6, 2021, and the Company’s responsive brief is currently due on February 16, 2022. The Company investigates all claims, litigation and other legal matters as they arise. Although claims and litigation are inherently unpredictable, the Company is currently not aware of any matters that, if determined adversely to the Company, would individually or taken together have a material adverse effect on its business, financial position, results of operations or cash flows. The Company accrues estimates for resolution of legal and other contingencies when losses are probable and estimable. Although the results of claims and litigation are inherently unpredictable, the Company believes that there was less than a reasonable possibility that the Company had incurred a material loss with respect to such loss contingencies, as of October 31, 2021 and January 31, 2021; therefore, the Company has not recorded an accrual for such contingencies. Indemnification The Company enters into indemnification provisions under its agreements with other companies in the ordinary course of business, including business partners, landlords, contractors and parties performing its research and development. Pursuant to these arrangements, the Company agrees to indemnify, hold harmless and reimburse the indemnified party for certain losses suffered or incurred by the indemnified party as a result of the Company’s activities. The terms of these indemnification agreements are generally perpetual. The maximum potential amount of future payments the Company could be required to make under these agreements is not determinable. The Company has never incurred costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, the Company believes the fair value of these agreements is not material. The Company maintains commercial general liability insurance and product liability insurance to offset certain of the Company’s potential liabilities under these indemnification provisions. The Company has entered into indemnification agreements with each of its directors and executive officers. These agreements require the Company to indemnify such individuals, to the fullest extent permitted by Delaware law, for certain liabilities to which they may become subject as a result of their affiliation with the Company.

Revenue

Revenue	9 Months Ended
	Oct. 31, 2021
Revenues [Abstract]
Revenue	Revenue Disaggregation of Revenue Based on the information provided to and reviewed by the Company’s Chief Executive Officer, its Chief Operating Decision Maker, the Company believes that the nature, amount, timing and uncertainty of its revenue and cash flows and how they are affected by economic factors is most appropriately depicted through the Company’s primary geographical markets and subscription product categories. The Company’s primary geographical markets are North and South America (“Americas”); Europe, Middle East and Africa (“EMEA”); and Asia Pacific. The Company also disaggregates its subscription products between its MongoDB Atlas-related offerings and other subscription products, which include MongoDB Enterprise Advanced. The following table presents the Company’s revenues disaggregated by primary geographical markets, subscription product categories and services (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2021 2020 2021 2020 Primary geographical markets: Americas $ 138,036 $ 93,255 $ 368,339 $ 261,836 EMEA 66,183 44,552 178,490 123,762 Asia Pacific 22,674 12,964 60,459 33,783 Total $ 226,893 $ 150,771 $ 607,288 $ 419,381 Subscription product categories and services: MongoDB Atlas-related $ 131,123 $ 71,110 $ 336,390 $ 186,354 Other subscription 86,748 72,959 247,432 215,049 Services 9,022 6,702 23,466 17,978 Total $ 226,893 $ 150,771 $ 607,288 $ 419,381 Customers located in the United States accounted for 55% of total revenue for both the three and nine months ended October 31, 2021 and 57% of total revenue for both the three and nine months ended October 31, 2020. No other country accounted for 10% or more of revenue for the three and nine months ended October 31, 2021. Customers located in the United Kingdom accounted for 10% of total revenue for both the three and nine months ended October 31, 2020. Contract Liabilities The Company’s contract liabilities are recorded as deferred revenue in the Company’s condensed consolidated balance sheet and consist of customer invoices issued or payments received in advance of revenues being recognized from the Company’s subscription and services contracts. Deferred revenue, including current and non-current balances, as of October 31, 2021 and January 31, 2021 was $297.9 million and $238.0 million, respectively. Approximately 30% and 35% of the total revenue recognized for the nine months ended October 31, 2021 and 2020, respectively, was from deferred revenue at the beginning of each respective period. Remaining Performance Obligations Remaining performance obligations represent the aggregate amount of the transaction price in contracts allocated to performance obligations not delivered, or partially undelivered, as of the end of the reporting period. Remaining performance obligations include unearned revenue, multi-year contracts with future installment payments and certain unfulfilled orders against accepted customer contracts at the end of any given period. As of October 31, 2021, the aggregate transaction price allocated to remaining performance obligations was $353.4 million. Approximately 61% is expected to be recognized as revenue over the next 12 months and the remainder thereafter. The Company applies the practical expedient to omit disclosure with respect to the amount of the transaction price allocated to remaining performance obligations if the related contract has a total duration of 12 months or less. Unbilled Receivables Revenue recognized in excess of invoiced amounts creates an unbilled receivable, which represents the Company’s unconditional right to consideration in exchange for goods or services that the Company has transferred to the customer. Unbilled receivables were recorded as part of accounts receivable, net in the Company’s condensed consolidated balance sheets. As of October 31, 2021 and January 31, 2021, unbilled receivables were $6.9 million and $5.7 million, respectively. Allowance for Doubtful Accounts The adoption of ASU 2016-13 on February 1, 2020 required the Company to shift from an incurred loss impairment model to an expected credit loss model. Accordingly, the Company is required to consider expectations of forward-looking losses, in addition to historical loss rates, to estimate its allowance for doubtful accounts on its account receivables. The following is a summary of the changes in the Company’s allowance for doubtful accounts (in thousands): Allowance for Doubtful Accounts Balance at January 31, 2021 $ 6,024 Provision 3,652 Recoveries/write-offs (4,680) Balance as of October 31, 2021 $ 4,996 Costs Capitalized to Obtain Contracts with Customers Deferred commissions were $153.4 million and $118.6 million as of October 31, 2021 and January 31, 2021, respectively. Amortization expense with respect to deferred commissions, which is included in sales and marketing expense in the Company’s condensed consolidated statement of operations, was $13.3 million and $33.5 million for the three and nine months ended October 31, 2021, respectively, and $7.2 million and $20.5 million for the three and nine months ended October 31, 2020, respectively. There was no impairment loss in relation to the costs capitalized for the periods presented.

Equity Incentive Plans and Empl

Equity Incentive Plans and Employee Stock Purchase Plan	9 Months Ended
	Oct. 31, 2021
Share-based Payment Arrangement [Abstract]
Equity Incentive Plans and Employee Stock Purchase Plan	Equity Incentive Plans and Employee Stock Purchase Plan 2008 Stock Incentive Plan and 2016 Equity Incentive Plan The Company adopted the 2008 Stock Incentive Plan (as amended, the “2008 Plan”) and the 2016 Equity Incentive Plan (as amended, the “2016 Plan”), primarily for the purpose of granting stock-based awards to employees, directors and consultants, including stock options, restricted stock units (“RSUs”) and other stock-based awards. With the establishment of the 2016 Plan in December 2016, all shares available for grant under the 2008 Plan were transferred to the 2016 Plan. The Company no longer grants any stock-based awards under the 2008 Plan and any shares underlying stock options canceled under the 2008 Plan will be automatically transferred to the 2016 Plan. Stock Options The 2016 Plan provides for the issuance of incentive stock options to employees and nonstatutory stock options to employees, directors or consultants. The Company’s Board of Directors or a committee thereof determines the vesting schedule for all equity awards. Stock option awards generally vest over a period of four years with 25% vesting on the one-year anniversary of the award and the remainder vesting monthly over the next 36 months of the grantee’s service to the Company. The following table summarizes stock option activity for the nine months ended October 31, 2021 (in thousands, except share and per share data and years): Shares Weighted- Weighted- Aggregate Balance - January 31, 2021 3,881,545 $ 7.50 4.8 $ 1,405,540 Stock options exercised (986,002) 7.73 Stock options forfeited and expired (9,982) 10.95 Balance - October 31, 2021 2,885,561 $ 7.41 4.1 $ 1,482,829 Vested and exercisable - January 31, 2021 3,566,091 $ 7.22 4.7 $ 1,292,303 Vested and exercisable - October 31, 2021 2,884,486 $ 7.40 4.1 $ 1,482,299 Restricted Stock Units The 2016 Plan provides for the issuance of RSUs to employees, directors and consultants. RSUs granted to new employees generally vest over a period of four years with 25% vesting on the one-year anniversary of the vesting start date and the remainder vesting quarterly over the next 12 quarters, subject to the grantee’s continued service to the Company. RSUs granted to existing employees generally vest quarterly over a period of four years, subject to the grantee’s continued service to the Company. The following table summarizes RSU activity for the nine months ended October 31, 2021: Shares Weighted-Average Grant Date Fair Value per RSU Unvested - January 31, 2021 3,473,512 $ 139.68 RSUs granted 1,422,325 386.88 RSUs vested (1,070,507) 142.93 RSUs forfeited and canceled (335,347) 182.95 Unvested - October 31, 2021 3,489,983 $ 235.27 2017 Employee Stock Purchase Plan In October 2017, the Company’s Board of Directors adopted, and stockholders approved, the 2017 Employee Stock Purchase Plan (the “2017 ESPP”). Subject to any plan limitations, the 2017 ESPP allows eligible employees to contribute, normally through payroll deductions, up to 15% of their earnings for the purchase of the Company’s Class A common stock at a discounted price per share. In June 2021 the Company issued 45,261 shares of Class A common stock under the 2017 ESPP. The Company’s current offering period began June 16, 2021 and is expected to end December 15, 2021. Stock-Based Compensation Expense Total stock-based compensation expense recognized in the Company’s unaudited condensed consolidated statements of operations is as follows (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2021 2020 2021 2020 Cost of revenue—subscription $ 3,934 $ 2,446 $ 10,322 $ 6,508 Cost of revenue—services 1,521 1,513 4,473 4,142 Sales and marketing 24,790 14,696 64,749 38,754 Research and development 29,205 15,442 73,227 41,415 General and administrative 9,258 5,855 24,556 17,225 Total stock-based compensation expense $ 68,708 $ 39,952 $ 177,327 $ 108,044

Net Loss Per Share

Net Loss Per Share	9 Months Ended
	Oct. 31, 2021
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share The Company calculates basic net loss per share 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 is computed by giving effect to all potentially dilutive shares of Class A common stock outstanding for the period, including stock options, restricted stock units and shares underlying the conversion option of the 2024 Notes and the 2026 Notes. Basic and diluted net loss per share was the same for each period presented, as the inclusion of all potential shares of Class A common stock outstanding would have been anti-dilutive due to the net loss reported for each period presented. The following table sets forth the computation of basic and diluted net loss per share (in thousands, except share and per share data): Three Months Ended October 31, Nine Months Ended October 31, 2021 2020 2021 2020 Numerator: Net loss $ (81,293) $ (72,651) $ (222,418) $ (191,143) Denominator: Weighted-average shares used to compute net loss per share, basic and diluted 66,386,379 59,368,167 63,750,884 58,476,521 Net loss per share, basic and diluted $ (1.22) $ (1.22) $ (3.49) $ (3.27) Prior to the adoption of ASU 2020-06, the Company calculated the potential dilutive effect of its 2024 Notes and 2026 Notes under the treasury stock method. As a result, only the amount by which the conversion value exceeded the aggregate principal amount of the 2024 Notes and 2026 Notes (the “conversion spread”) was considered in the diluted earnings per share computation. The conversion spread only had a dilutive impact on diluted net income per share when the average market price of the Company’s Class A common stock for a given period exceeded the initial conversion price of $68.15 per share for the 2024 Notes and $211.20 per share for the 2026 Notes. Upon the adoption of ASU 2020-06 on February 1, 2021, the Company calculates the potential dilutive effect of its 2024 Notes and 2026 under the if-converted method. Under this method, diluted earnings per share is determined by assuming that all of the 2024 Notes and the 2026 Notes were converted into shares of the Company’s Class A common stock at the beginning of the reporting period. In connection with the issuance of the 2024 Notes and 2026 Notes, the Company entered into Capped Calls, which were not included for purposes of calculating the number of diluted shares outstanding, as their effect would have been anti-dilutive. The Capped Calls are expected to partially offset the potential dilution to the Company’s Class A common stock upon any conversion of the 2024 Notes and 2026 Notes. The Company has not exercised any of its Capped Calls as of October 31, 2021. The following weighted-average outstanding potentially dilutive shares of common stock were excluded from the computation of diluted net loss per share for the periods presented because the impact of including them would have been anti-dilutive: Three Months Ended October 31, Nine Months Ended October 31, 2021 2020 2021 2020 Stock options pursuant to the 2016 Equity Incentive Plan 722,070 1,234,642 818,589 1,434,388 Stock options pursuant to the 2008 Stock Incentive Plan (previously options to purchase Class B common stock) 2,250,736 3,614,730 2,476,270 4,013,050 Unvested restricted stock units 3,679,734 3,938,037 3,745,955 4,004,267 Early exercised stock options — 2,831 136 6,418 Shares underlying the conversion option of the 2024 Notes (conversion spread only prior to the adoption of ASU 2020-06) 27,337 925,870 308,849 841,126 Shares underlying the conversion option of the 2026 Notes 5,445,092 — 5,445,116 — Total 12,124,969 9,716,110 12,794,915 10,299,249

Income Taxes

Income Taxes	9 Months Ended
	Oct. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recorded a provision for income taxes of $2.2 million and $2.4 million for the three and nine months ended October 31, 2021, respectively, and a provision for income taxes of $0.9 million and $2.1 million for the three and nine months ended October 31, 2020, respectively. The provision recorded during the three months ended October 31, 2021 was driven by the increase in global income and the associated foreign taxes as the Company continues its global expansion. The provision for the nine months ended October 31, 2021, was the result of an increase in foreign taxes, partially offset by the release of the valuation allowance as a result of goodwill recorded associated with an immaterial business combination, as well as the reversal of the deferred tax liability associated with the convertible senior notes upon the adoption of ASU 2020-06. The calculation of income taxes was based upon the estimated annual effective tax rates for the year applied to the jurisdictional mix of current period income (loss) before tax plus the tax effect of any significant unusual items, discrete events or changes in tax law. The Company regularly assesses the need for a valuation allowance against its deferred tax assets. In making that assessment, the Company considers both positive and negative evidence related to the likelihood of realization of the deferred tax assets to determine, based on the weight of available evidence, whether it is more likely than not that some or all of the deferred tax assets will not be realized. The Company has maintained a valuation allowance on U.S., U.K. and Ireland net deferred tax assets, as it is more likely than not that some or all of the deferred tax assets will not be realized. The Company assesses uncertain tax positions in accordance with ASC 740-10, Accounting for Uncertainties in Tax . As of January 31, 2021, the Company’s net unrecognized tax benefits totaled $17.5 million, which would have no impact on the Company’s effective tax rate if recognized. The Company continues to monitor and interpret the impact of proposed and enacted global tax legislation, such as the Coronavirus Aid, Relief, and Economic Security Act, and the impact of such tax legislation on the effective tax rate and tax provision thereunder. To date, based on the full valuation allowance against the Company’s two most significant tax jurisdictions, the United States and Ireland, the impact of global enacted and proposed legislation has not had an impact on the tax provisions of the financial statements. The Company continues to monitor to ensure both the Company’s financial results and its related tax disclosures are in compliance with any tax legislation.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Oct. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	The accompanying interim condensed consolidated balance sheet as of October 31, 2021, the interim condensed consolidated statements of stockholders’ equity (deficit) for the three and nine months ended October 31, 2021 and 2020, the interim condensed consolidated statements of operations and of comprehensive loss for the three and nine months ended October 31, 2021 and 2020 and the interim condensed consolidated statements of cash flows for the nine months ended October 31, 2021 and 2020 are unaudited. The interim unaudited condensed consolidated financial statements have been prepared on a basis consistent with the annual consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary to state fairly the Company’s financial position as of October 31, 2021, its statements of stockholders’ equity (deficit) as of October 31, 2021 and 2020, its results of operations and of comprehensive loss for the three and nine months ended October 31, 2021 and 2020 and its statements of cash flows for the nine months ended October 31, 2021 and 2020. The financial data and the other financial information disclosed in the notes to these interim condensed consolidated financial statements related to the three- and nine-month periods are also unaudited. The results of operations for the three and nine months ended October 31, 2021 are not necessarily indicative of the results to be expected for the fiscal year ending January 31, 2022 or for any other future year or interim period. The interim unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and include the accounts of the Company and its wholly owned subsidiaries. All intercompany transactions and accounts have been eliminated. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to the applicable rules and regulations of the Securities and Exchange Commission. The condensed balance sheet data as of January 31, 2021 was derived from the Company’s audited financial statements, but does not include all disclosures required by U.S. GAAP. Therefore, these interim unaudited condensed consolidated financial statements and accompanying footnotes should be read in conjunction with the Company’s annual consolidated financial statements and related footnotes included in its Annual Report on Form 10-K for the fiscal year ended January 31, 2021 (the “2021 Form 10-K”).
Use of Estimates	The preparation of the interim unaudited condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates, assumptions and judgments that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Such estimates include, but are not limited to, revenue recognition, allowances for doubtful accounts, the incremental borrowing rate related to the Company’s lease liabilities, stock-based compensation, fair value of common stock prior to the initial public offering, legal contingencies, fair value of acquired intangible assets and goodwill, useful lives of acquired intangible assets and property and equipment, fair value of non-marketable securities and accounting for income taxes. The Company bases these estimates on historical and anticipated results, trends and various other assumptions that it believes are reasonable under the circumstances, including assumptions as to future events. The ongoing COVID-19 pandemic has resulted in a global slowdown of economic activity that is likely to continue to decrease demand and supply for a broad variety of goods and services, including demand from the Company’s customers, while also disrupting sales channels and marketing activities for an unknown period of time. Estimates and assumptions about future events and their effects cannot be determined with certainty and therefore require the exercise of judgment. As of the date of issuance of these financial statements, the Company is not aware of any specific event or circumstance that would require the Company to update its estimates, assumptions and judgments or adjust the carrying value of its assets or liabilities. These estimates may change as new events occur and additional information is obtained and are recognized in the consolidated financial statements as soon as they become known. Actual results could differ from those estimates and any such differences may be material to the Company’s financial statements.
Recently Adopted Accounting Pronouncements and New Accounting Pronouncements Not Yet Adopted	Convertible Senior Notes. In August 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-06— Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity (“ASU 2020-06”). The new standard simplifies the accounting for convertible instruments by eliminating the conversion option separation model for convertible debt that can be settled in cash and by eliminating the measurement model for beneficial conversion features. Convertible instruments that continue to be subject to separation models are (1) those with conversion options that are required to be accounted for as bifurcated derivatives and (2) convertible debt instruments issued with substantial premiums for which the premiums are recorded as paid-in capital. Additionally, among other changes, the new guidance eliminates some of the conditions for equity classification for contracts in an entity’s own equity, thereby making it easier for equity contracts to qualify for the derivative scope exception. The new standard also requires entities to use the if-converted method for all convertible instruments in the diluted earnings per share calculation and include the effect of share settlement for instruments that may be settled in cash or shares, except for certain liability-classified share-based payment awards. The Company early adopted ASU 2020-06 as of February 1, 2021 using the modified retrospective transition method. Upon adoption of ASU 2020-06, the Company is no longer recording the conversion feature of its convertible senior notes in equity. Instead, the Company combined the previously separated equity component with the liability component, which together is now classified as debt, thereby eliminating the subsequent amortization of the debt discount as interest expense. Similarly, the portion of issuance costs previously allocated to equity was reclassified to debt and amortized as interest expense. Accordingly, the Company recorded a decrease to accumulated deficit of $52.6 million, a decrease to additional paid-in capital of $309.4 million, a decrease to temporary equity of $4.7 million and an increase to convertible senior notes, net, of $261.5 million. There was an immaterial benefit from the reversal of the deferred tax liability associated with the convertible senior notes upon the adoption of ASU 2020-06. Prior period financial statements were not restated. Also upon adoption, the Company is no longer utilizing the treasury stock method for earnings per share purposes. Instead, the Company is applying the if-converted method when reporting the number of potentially dilutive shares of common stock. Although the required use of the if-converted method will not impact the diluted net loss per share as long as the Company is in a net loss position, the Company is required to include disclosures of all the underlying shares regardless of the average stock price for the reporting period. The Company’s convertible senior notes are classified as non-current liabilities until the reporting period date is within one year of maturity of the convertible senior notes or when the Company has received a redemption request, but settlement will occur after the reporting period date. Under such circumstances, the carrying amount of the convertible senior notes, net of the associated unamortized debt issuance costs, is classified as a current liability. Income Taxes. In December 2019, the FASB issued ASU 2019-12— Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The amendments in ASU 2019-12 simplify the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application and simplification of GAAP for other areas of Topic 740 by clarifying and amending existing guidance. The Company adopted ASU 2019-12 effective February 1, 2021 and the adoption of this standard did not have a material impact on the Company’s condensed consolidated financial statements.
Net Loss per Share	The Company calculates basic net loss per share 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 is computed by giving effect to all potentially dilutive shares of Class A common stock outstanding for the period, including stock options, restricted stock units and shares underlying the conversion option of the 2024 Notes and the 2026 Notes. Basic and diluted net loss per share was the same for each period presented, as the inclusion of all potential shares of Class A common stock outstanding would have been anti-dilutive due to the net loss reported for each period presented.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Oct. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of financial assets and liabilities measured at fair value on a recurring basis	The following tables present information about the Company’s financial assets and liabilities that have been measured at fair value on a recurring basis as of October 31, 2021 and January 31, 2021 and indicate the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands): Fair Value Measurement as of October 31, 2021 Level 1 Level 2 Level 3 Total Financial Assets: Cash and cash equivalents: Money market funds $ 631,924 $ — $ — $ 631,924 Short-term investments: U.S. government treasury securities 1,054,746 — — 1,054,746 Total financial assets $ 1,686,670 $ — $ — $ 1,686,670 Fair Value Measurement as of January 31, 2021 Level 1 Level 2 Level 3 Total Financial Assets: Cash and cash equivalents: Money market funds $ 330,109 $ — $ — $ 330,109 Short-term investments: U.S. government treasury securities 528,045 — — 528,045 Total financial assets $ 858,154 $ — $ — $ 858,154

Goodwill and Acquired Intangi_2

Goodwill and Acquired Intangible Assets, Net (Tables)	9 Months Ended
	Oct. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying amount and accumulated amortization of intangible assets	The gross carrying amount and accumulated amortization of the Company’s intangible assets are as follows (in thousands): October 31, 2021 Gross Carrying Value Accumulated Amortization Net Book Value Weighted-Average Remaining Useful Life Developed technology $ 38,100 $ (21,447) $ 16,653 2.9 Customer relationships 15,200 (8,950) 6,250 2.1 Total $ 53,300 $ (30,397) $ 22,903 January 31, 2021 Gross Carrying Value Accumulated Amortization Net Book Value Weighted-Average Remaining Useful Life Developed technology $ 34,700 $ (16,955) $ 17,745 3.3 Customer relationships 15,200 (6,670) 8,530 2.8 Total $ 49,900 $ (23,625) $ 26,275
Future amortization expense related to intangible assets	As of October 31, 2021, future amortization expense related to the intangible assets is as follows (in thousands): Years Ending January 31, Remainder of 2022 $ 2,295 2023 9,180 2024 8,505 2025 2,130 2026 680 2027 113 Total $ 22,903

Convertible Senior Notes (Table

Convertible Senior Notes (Tables)	9 Months Ended
	Oct. 31, 2021
Debt Disclosure [Abstract]
Convertible debt schedules	The net carrying amounts of the liability component of the 2024 Notes and the 2026 Notes were as follows for the periods presented (in thousands): October 31, 2021 January 31, 2021 2024 Notes 2026 Notes 2024 Notes 2026 Notes Principal $ 1,863 (1) $ 1,149,991 $ 90,000 $ 1,150,000 Unamortized debt discount (2) — — (15,459) (249,907) Unamortized debt issuance costs (25) (14,307) (1,265) (13,174) Net carrying amount (2) $ 1,838 $ 1,135,684 $ 73,276 $ 886,919 (1) The aggregate principal amount outstanding of the 2024 Notes is presented within Other Accrued Liabilities on the Company’s condensed consolidated balance sheet as of October 31, 2021. (2) The net carrying amount was increased on February 1, 2021 as a result of the adoption of ASU 2020-06. Refer to Note 2, Summary of Significant Accounting Policies , in this Quarterly Report on Form 10-Q for further information.
Interest expense related to Notes	The following table sets forth the interest expense related to the 2024 Notes and 2026 Notes (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2021 2020 2021 2020 2024 Notes 2026 Notes 2024 Notes 2026 Notes 2024 Notes 2026 Notes 2024 Notes 2026 Notes Contractual interest expense $ 4 $ 719 $ 168 $ 718 $ 203 $ 2,156 $ 506 $ 2,156 Amortization of debt discount (1) — — 1,002 10,826 — — 2,958 32,058 Amortization of issuance costs (1) 2 840 70 469 646 2,515 203 1,366 Total (1) $ 6 $ 1,559 $ 1,240 $ 12,013 $ 849 $ 4,671 $ 3,667 $ 35,580 (1) The decrease in total interest expense for the three and nine months ended October 31, 2021 as compared to the respective prior-year periods was due to the derecognition of the unamortized debt discount, partially offset by the increase in the amortization of issuance costs previously recognized in equity. These changes were the result of the Company’s adoption of ASU 2020-06, as of February 1, 2021, as described in Note 2, Summary of Significant Accounting Policies .

Leases (Tables)

Leases (Tables)	9 Months Ended
	Oct. 31, 2021
Leases [Abstract]
Lease, Cost	The components of the Company’s lease costs included in its condensed consolidated statement of operations were as follows (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2021 2020 2021 2020 Finance lease cost: Amortization of finance lease right-of-use assets $ 993 $ 993 $ 2,981 $ 2,981 Interest on finance lease liabilities 785 852 2,406 2,604 Operating lease cost 2,313 2,335 6,481 6,189 Short-term lease cost 431 435 630 1,968 Total lease cost $ 4,522 $ 4,615 $ 12,498 $ 13,742 The following table presents supplemental information related to the Company’s finance and operating leases (in thousands, except weighted-average information): Nine Months Ended October 31, 2021 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance lease $ 2,406 $ 2,604 Operating cash flows from operating leases 5,909 4,146 Financing cash flows from finance lease 3,649 3,450 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 12,893 $ 30,593 Weighted-average remaining lease term (in years): Finance lease 8.2 9.2 Operating leases 7.4 7.9 Weighted-average discount rate: Finance lease 5.6 % 5.6 % Operating leases 4.3 % 4.6 %
Assets And Liabilities, Lessee	The balances of the Company’s finance and operating leases were recorded on the condensed consolidated balance sheet as follows (in thousands): October 31, 2021 January 31, 2021 Finance Lease: Property and equipment, net $ 32,457 $ 35,437 Other accrued liabilities (current) 5,111 4,900 Other liabilities, non-current 50,496 54,356 Operating Leases: Operating lease right-of-use assets $ 42,291 $ 34,587 Operating lease liabilities (current) 7,298 2,343 Operating lease liabilities, non-current 41,072 39,095
Finance Lease, Liability, Maturity	Future minimum lease payments under non-cancelable finance and operating leases on an annual undiscounted cash flow basis as of October 31, 2021 were as follows (in thousands): Year Ending January 31, Finance Lease Operating Leases Remainder of 2022 $ 2,018 $ 1,729 2023 8,073 10,050 2024 8,073 8,759 2025 8,445 7,557 2026 8,711 6,081 Thereafter 34,118 22,604 Total minimum payments 69,438 56,780 Less imputed interest (13,831) (8,410) Present value of future minimum lease payments 55,607 48,370 Less current obligations under leases (5,111) (7,298) Non-current lease obligations $ 50,496 $ 41,072
Lessee, Operating Lease, Liability, Maturity	Future minimum lease payments under non-cancelable finance and operating leases on an annual undiscounted cash flow basis as of October 31, 2021 were as follows (in thousands): Year Ending January 31, Finance Lease Operating Leases Remainder of 2022 $ 2,018 $ 1,729 2023 8,073 10,050 2024 8,073 8,759 2025 8,445 7,557 2026 8,711 6,081 Thereafter 34,118 22,604 Total minimum payments 69,438 56,780 Less imputed interest (13,831) (8,410) Present value of future minimum lease payments 55,607 48,370 Less current obligations under leases (5,111) (7,298) Non-current lease obligations $ 50,496 $ 41,072

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Oct. 31, 2021
Revenues [Abstract]
Schedule of total revenue by geographical markets, subscription product categories and services	The following table presents the Company’s revenues disaggregated by primary geographical markets, subscription product categories and services (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2021 2020 2021 2020 Primary geographical markets: Americas $ 138,036 $ 93,255 $ 368,339 $ 261,836 EMEA 66,183 44,552 178,490 123,762 Asia Pacific 22,674 12,964 60,459 33,783 Total $ 226,893 $ 150,771 $ 607,288 $ 419,381 Subscription product categories and services: MongoDB Atlas-related $ 131,123 $ 71,110 $ 336,390 $ 186,354 Other subscription 86,748 72,959 247,432 215,049 Services 9,022 6,702 23,466 17,978 Total $ 226,893 $ 150,771 $ 607,288 $ 419,381
Accounts Receivable, Allowance for Credit Loss	The following is a summary of the changes in the Company’s allowance for doubtful accounts (in thousands): Allowance for Doubtful Accounts Balance at January 31, 2021 $ 6,024 Provision 3,652 Recoveries/write-offs (4,680) Balance as of October 31, 2021 $ 4,996

Equity Incentive Plans and Em_2

Equity Incentive Plans and Employee Stock Purchase Plan (Tables)	9 Months Ended
	Oct. 31, 2021
Share-based Payment Arrangement [Abstract]
Schedule of stock option activity	The following table summarizes stock option activity for the nine months ended October 31, 2021 (in thousands, except share and per share data and years): Shares Weighted- Weighted- Aggregate Balance - January 31, 2021 3,881,545 $ 7.50 4.8 $ 1,405,540 Stock options exercised (986,002) 7.73 Stock options forfeited and expired (9,982) 10.95 Balance - October 31, 2021 2,885,561 $ 7.41 4.1 $ 1,482,829 Vested and exercisable - January 31, 2021 3,566,091 $ 7.22 4.7 $ 1,292,303 Vested and exercisable - October 31, 2021 2,884,486 $ 7.40 4.1 $ 1,482,299
Schedule of restricted stock unit activity	The following table summarizes RSU activity for the nine months ended October 31, 2021: Shares Weighted-Average Grant Date Fair Value per RSU Unvested - January 31, 2021 3,473,512 $ 139.68 RSUs granted 1,422,325 386.88 RSUs vested (1,070,507) 142.93 RSUs forfeited and canceled (335,347) 182.95 Unvested - October 31, 2021 3,489,983 $ 235.27
Schedule of stock-based compensation expense recognized in consolidated statements of operations	Total stock-based compensation expense recognized in the Company’s unaudited condensed consolidated statements of operations is as follows (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2021 2020 2021 2020 Cost of revenue—subscription $ 3,934 $ 2,446 $ 10,322 $ 6,508 Cost of revenue—services 1,521 1,513 4,473 4,142 Sales and marketing 24,790 14,696 64,749 38,754 Research and development 29,205 15,442 73,227 41,415 General and administrative 9,258 5,855 24,556 17,225 Total stock-based compensation expense $ 68,708 $ 39,952 $ 177,327 $ 108,044

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	9 Months Ended
	Oct. 31, 2021
Earnings Per Share [Abstract]
Schedule of basic and diluted earnings (loss) per share	The following table sets forth the computation of basic and diluted net loss per share (in thousands, except share and per share data): Three Months Ended October 31, Nine Months Ended October 31, 2021 2020 2021 2020 Numerator: Net loss $ (81,293) $ (72,651) $ (222,418) $ (191,143) Denominator: Weighted-average shares used to compute net loss per share, basic and diluted 66,386,379 59,368,167 63,750,884 58,476,521 Net loss per share, basic and diluted $ (1.22) $ (1.22) $ (3.49) $ (3.27)
Schedule of antidilutive securities excluded from computation of earnings per share	The following weighted-average outstanding potentially dilutive shares of common stock were excluded from the computation of diluted net loss per share for the periods presented because the impact of including them would have been anti-dilutive: Three Months Ended October 31, Nine Months Ended October 31, 2021 2020 2021 2020 Stock options pursuant to the 2016 Equity Incentive Plan 722,070 1,234,642 818,589 1,434,388 Stock options pursuant to the 2008 Stock Incentive Plan (previously options to purchase Class B common stock) 2,250,736 3,614,730 2,476,270 4,013,050 Unvested restricted stock units 3,679,734 3,938,037 3,745,955 4,004,267 Early exercised stock options — 2,831 136 6,418 Shares underlying the conversion option of the 2024 Notes (conversion spread only prior to the adoption of ASU 2020-06) 27,337 925,870 308,849 841,126 Shares underlying the conversion option of the 2026 Notes 5,445,092 — 5,445,116 — Total 12,124,969 9,716,110 12,794,915 10,299,249

Organization and Description _2

Organization and Description of Business (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	9 Months Ended
	Jul. 31, 2021	Oct. 31, 2021	Oct. 31, 2020	Jun. 29, 2021	Jan. 31, 2021
Class of Stock [Line Items]
Shares issued, price per share (in dollars per share)				$ 365
Proceeds from issuance of common stock, net of issuance costs		$ 889,184	$ 0
Underwriting discounts and commissions	$ 22,700
2021 Common Stock Offering
Class of Stock [Line Items]
Offering expenses	600
Additional Paid-In Capital
Class of Stock [Line Items]
Proceeds from issuance of common stock, net of issuance costs	$ 889,200
Class A Common Stock
Class of Stock [Line Items]
Common stock, par value (in dollars per share)		$ 0.001		$ 0.001	$ 0.001

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jul. 31, 2021	Apr. 30, 2021	Jan. 31, 2021	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change	$ (662,905)	$ (673,724)	$ 268,364	$ 5,033	$ (21,804)	$ (48,151)	$ (63,041)	$ (82,858)
Temporary equity, convertible senior notes	0			4,714
Convertible senior notes, net	1,135,684			937,729
Accumulated Deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change	1,105,186	1,023,893	946,760	935,403	859,602	786,951	722,426	668,232
Additional Paid-In Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change	(1,770,635)	$ (1,699,150)	$ (680,413)	(932,332)	$ (883,002)	$ (836,293)	$ (785,730)	(752,127)
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change				256,746				227
Temporary equity, convertible senior notes	4,700
Convertible senior notes, net	261,500
Cumulative Effect, Period of Adoption, Adjustment | Accumulated Deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change	(52,600)			(52,635)				$ 227
Cumulative Effect, Period of Adoption, Adjustment | Additional Paid-In Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change	$ (309,400)			$ 309,381

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 31, 2021	Oct. 31, 2021	Oct. 31, 2020	Jan. 31, 2021
Short-term investments:
Total financial assets	$ 1,686,670	$ 1,686,670		$ 858,154
Other assets	110,106	110,106		85,555
Investment in non-marketable securities	(1,200)	(2,343)	$ (500)
Variable Interest Entity, Not Primary Beneficiary
Short-term investments:
Other assets	2,800	2,800		500
Level 1
Short-term investments:
Total financial assets	1,686,670	1,686,670		858,154
Level 2
Short-term investments:
Total financial assets	0	0		0
Level 3
Short-term investments:
Total financial assets	0	0		0
U.S. government treasury securities
Short-term investments:
Short-term investments:	1,054,746	1,054,746		528,045
U.S. government treasury securities | Level 1
Short-term investments:
Short-term investments:	1,054,746	1,054,746		528,045
U.S. government treasury securities | Level 2
Short-term investments:
Short-term investments:	0	0		0
U.S. government treasury securities | Level 3
Short-term investments:
Short-term investments:	0	0		0
Money market funds
Cash and cash equivalents:
Cash and cash equivalents:	631,924	631,924		330,109
Money market funds | Level 1
Cash and cash equivalents:
Cash and cash equivalents:	631,924	631,924		330,109
Money market funds | Level 2
Cash and cash equivalents:
Cash and cash equivalents:	0	0		0
Money market funds | Level 3
Cash and cash equivalents:
Cash and cash equivalents:	$ 0	$ 0		$ 0

Goodwill and Acquired Intangi_3

Goodwill and Acquired Intangible Assets, Net - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 30, 2021	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020	Jan. 31, 2021
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill		$ 57,775		$ 57,775		$ 55,830
Amortization of intangible assets		$ 2,300	$ 2,100	$ 6,800	$ 6,400
2021 Acquisition
Acquired Finite-Lived Intangible Assets [Line Items]
Cash consideration for aquisition	$ 9,000
Business acquisition, purchase price	4,500
Post-combination compensation expense	4,500
Goodwill	1,900
Other tax expense (benefit)	800
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life				2 years 10 months 24 days		3 years 3 months 18 days
Developed technology | 2021 Acquisition
Acquired Finite-Lived Intangible Assets [Line Items]
Business acquisition, finite-lived intangibles	$ 3,400
Finite-lived intangible asset, useful life	5 years
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life				2 years 1 month 6 days		2 years 9 months 18 days

Goodwill and Acquired Intangi_4

Goodwill and Acquired Intangible Assets, Net - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Oct. 31, 2021	Jan. 31, 2021
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 53,300	$ 49,900
Accumulated Amortization	(30,397)	(23,625)
Net Book Value	22,903	26,275
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	38,100	34,700
Accumulated Amortization	(21,447)	(16,955)
Net Book Value	$ 16,653	$ 17,745
Weighted average useful life	2 years 10 months 24 days	3 years 3 months 18 days
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 15,200	$ 15,200
Accumulated Amortization	(8,950)	(6,670)
Net Book Value	$ 6,250	$ 8,530
Weighted average useful life	2 years 1 month 6 days	2 years 9 months 18 days

Goodwill and Acquired Intangi_5

Goodwill and Acquired Intangible Assets, Net - Future Amortization Expense (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2022	$ 2,295
2023	9,180
2024	8,505
2025	2,130
2026	680
2027	113
Net Book Value	$ 22,903	$ 26,275

Convertible Senior Notes - Addi

Convertible Senior Notes - Additional Information (Details)	Dec. 03, 2021shares	Jan. 31, 2020USD ($)	Jul. 31, 2018USD ($)	Oct. 31, 2021USD ($)day	Oct. 31, 2021USD ($)shares	Oct. 31, 2020USD ($)	Jan. 14, 2020USD ($)	Jun. 30, 2018USD ($)
Debt Instrument [Line Items]
Repayments of convertible senior notes attributable to principal					$ 27,594,000	$ 0
2024 Notes
Debt Instrument [Line Items]
Face amount of debt				$ 1,900,000	1,900,000
Fair value of convertible debt				9,500,000	9,500,000
2024 Notes | Subsequent Event
Debt Instrument [Line Items]
Debt conversion, shares issued (in shares) | shares	27,377
2026 Notes
Debt Instrument [Line Items]
Fair value of convertible debt				$ 2,800,000,000	2,800,000,000
Redemption Period 1
Debt Instrument [Line Items]
Threshold percentage of stock price trigger				130.00%
Consecutive threshold trading days | day				30
Redemption Period 1 | Minimum
Debt Instrument [Line Items]
Threshold trading days | day				20
Convertible Debt
Debt Instrument [Line Items]
Face amount of debt			$ 50,000,000				$ 90,000,000	$ 250,000,000
Interest rate								0.75%
Proceeds from borrowings on convertible senior notes, net of issuance costs			$ 291,100,000
Convertible debt, conversion ratio denominator				$ 100	$ 100
Convertible Debt | Additional Convertible Senior Notes Due 2026
Debt Instrument [Line Items]
Face amount of debt		$ 150,000,000
Convertible Debt | 2024 Notes Partial Repurchase
Debt Instrument [Line Items]
Face amount of debt							$ 210,000,000
Convertible Debt | Convertible Notes Due 2024 and 2026
Debt Instrument [Line Items]
Debt conversion, shares issued (in shares) | shares					1,216,492
Debt instrument, redeemed amount				$ 88,100,000	$ 88,100,000
Repayments of convertible senior notes attributable to principal					$ 27,600,000
Convertible Debt | 2026 Notes
Debt Instrument [Line Items]
Face amount of debt		$ 1,000,000,000
Interest rate		0.25%
Proceeds from borrowings on convertible senior notes, net of issuance costs		$ 1,130,000,000

Convertible Senior Notes - Sche

Convertible Senior Notes - Schedule of Net Carrying Amount of the Liability Component of the Notes (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
2024 Notes
Debt Instrument [Line Items]
Principal	$ 1,863	$ 90,000
Unamortized debt discount	0	(15,459)
Unamortized debt issuance costs	(25)	(1,265)
Net carrying amount	1,838	73,276
2026 Notes
Debt Instrument [Line Items]
Principal	1,149,991	1,150,000
Unamortized debt discount	0	(249,907)
Unamortized debt issuance costs	(14,307)	(13,174)
Net carrying amount	$ 1,135,684	$ 886,919

Convertible Senior Notes - Sc_2

Convertible Senior Notes - Schedule of Interest Expense for the Notes (Details) - Convertible Debt - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
2024 Notes
Debt Instrument [Line Items]
Contractual interest expense	$ 4	$ 168	$ 203	$ 506
Amortization of debt discount	0	1,002	0	2,958
Amortization of issuance costs	2	70	646	203
Total	6	1,240	849	3,667
2026 Notes
Debt Instrument [Line Items]
Contractual interest expense	719	718	2,156	2,156
Amortization of debt discount	0	10,826	0	32,058
Amortization of issuance costs	840	469	2,515	1,366
Total	$ 1,559	$ 12,013	$ 4,671	$ 35,580

Convertible Senior Notes - Capp

Convertible Senior Notes - Capped Calls (Details)	9 Months Ended
	Oct. 31, 2021$ / shares
Capped Calls
Option Indexed to Issuer's Equity [Line Items]
Strike price (in dollars per share)	$ 68.15
Cap price (in dollars per share)	106.90
Convertible Debt | 2026 Notes
Option Indexed to Issuer's Equity [Line Items]
Strike price (in dollars per share)	211.20
Cap price (in dollars per share)	$ 296.42

Leases - Narrative (Details)

Leases - Narrative (Details) $ in Thousands	9 Months Ended
	Oct. 31, 2021USD ($)ft²
Lessee, Lease, Description [Line Items]
Total minimum payments	$ 69,438
NY Office Lease
Lessee, Lease, Description [Line Items]
Rentable office space (in sqft) | ft²	106,230
Term of contract	12 years
Total minimum payments	$ 87,300
Financing lease renewal term	5 years
Palo Alto
Lessee, Lease, Description [Line Items]
Area of leased space (in sq ft) | ft²	16,000
Operating lease, term of contract	8 years
Operating lease renewal term	5 years
Lease not yet commenced, estimated base rent payments	$ 14,200

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Finance lease cost:
Amortization of finance lease right-of-use assets	$ 993	$ 993	$ 2,981	$ 2,981
Interest on finance lease liabilities	785	852	2,406	2,604
Operating lease cost	2,313	2,335	6,481	6,189
Short-term lease cost	431	435	630	1,968
Total lease cost	$ 4,522	$ 4,615	$ 12,498	$ 13,742

Leases - Balance Sheet Componen

Leases - Balance Sheet Components (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Finance Lease:
Property and equipment, net	$ 32,457	$ 35,437
Other accrued liabilities (current)	5,111	4,900
Other liabilities, non-current	50,496	54,356
Operating Leases:
Operating lease right-of-use assets	42,291	34,587
Operating lease liabilities (current)	7,298	2,343
Operating lease liabilities, non-current	$ 41,072	$ 39,095

Leases - Supplemental Informati

Leases - Supplemental Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance lease	$ 2,406	$ 2,604
Operating cash flows from operating leases	5,909	4,146
Financing cash flows from finance lease	3,649	3,450
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 12,893	$ 30,593
Weighted-average remaining lease term (in years):
Finance lease	8 years 2 months 12 days	9 years 2 months 12 days
Operating leases	7 years 4 months 24 days	7 years 10 months 24 days
Weighted-average discount rate:
Finance lease	5.60%	5.60%
Operating leases	4.30%	4.60%

Leases - Lease Maturities (Deta

Leases - Lease Maturities (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Finance Lease, Liability, Payment, Due [Abstract]
Remainder of 2022	$ 2,018
2023	8,073
2024	8,073
2025	8,445
2026	8,711
Thereafter	34,118
Total minimum payments	69,438
Less imputed interest	(13,831)
Present value of future minimum lease payments	55,607
Less current obligations under leases	(5,111)	$ (4,900)
Non-current lease obligations	50,496	54,356
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Remainder of 2022	1,729
2023	10,050
2024	8,759
2025	7,557
2026	6,081
Thereafter	22,604
Total minimum payments	56,780
Less imputed interest	(8,410)
Present value of future minimum lease payments	48,370
Less current obligations under leases	(7,298)	(2,343)
Non-current lease obligations	$ 41,072	$ 39,095

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($)	Oct. 31, 2021	Jan. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Accrual for contingencies	$ 0	$ 0

Revenue - Schedule of total rev

Revenue - Schedule of total revenue by geographic areas (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 226,893	$ 150,771	$ 607,288	$ 419,381
MongoDB Atlas-related
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	131,123	71,110	336,390	186,354
Other subscription
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	86,748	72,959	247,432	215,049
Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	9,022	6,702	23,466	17,978
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	138,036	93,255	368,339	261,836
Europe, Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	66,183	44,552	178,490	123,762
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 22,674	$ 12,964	$ 60,459	$ 33,783

Revenue - Concentration Risk (D

Revenue - Concentration Risk (Details) - Geographic Concentration Risk - Revenue, Net	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
United States
Concentration Risk [Line Items]
Concentration risk, percentage	55.00%	57.00%	55.00%	57.00%
United Kingdom
Concentration Risk [Line Items]
Concentration risk, percentage		10.00%		10.00%

Revenue - Additional Informatio

Revenue - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020	Jan. 31, 2021
Revenues [Abstract]
Deferred revenue	$ 297,900,000		$ 297,900,000		$ 238,000,000
Percent of revenue recognized from deferred revenue			30.00%	35.00%
Remaining performance obligation	353,400,000		$ 353,400,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unbilled receivables	6,900,000		$ 6,900,000		5,700,000
Percent of revenue recognized from deferred revenue			30.00%	35.00%
Deferred commissions	153,400,000		$ 153,400,000		118,600,000
Amortization of deferred commissions	13,300,000	$ 7,200,000	33,500,000	$ 20,500,000
Unbilled receivables	6,900,000		6,900,000		5,700,000
Deferred commissions	153,400,000		153,400,000		$ 118,600,000
Amortization of deferred commissions	13,300,000	7,200,000	33,500,000	20,500,000
Impairment loss	$ 0	$ 0	$ 0	$ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-11-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	61.00%		61.00%
Expected timing of satisfaction of remaining performance obligation	12 months		12 months

Revenue - Schedule of Allowance

Revenue - Schedule of Allowance for Doubtful Accounts (Details) $ in Thousands	9 Months Ended
	Oct. 31, 2021USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 6,024
Provision	3,652
Recoveries/write-offs	(4,680)
Ending balance	$ 4,996

Equity Incentive Plans and Em_3

Equity Incentive Plans and Employee Stock Purchase Plan - Stock Options (Details) - Employee Stock Option	9 Months Ended
	Oct. 31, 2021
One Year Anniversary
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Vesting rights percentage	25.00%
13 to 36 Months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	36 months
Vesting rights percentage	75.00%

Equity Incentive Plans and Em_4

Equity Incentive Plans and Employee Stock Purchase Plan - Schedule of Stock Option Activity (Details) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Oct. 31, 2021USD ($)$ / sharesshares	Jan. 31, 2021USD ($)$ / sharesshares
Shares
Balance - beginning of period (in shares) | shares	3,881,545
Stock options exercised (in shares) | shares	(986,002)
Stock options forfeited and expired (in shares) | shares	(9,982)
Balance - end of period (in shares) | shares	2,885,561	3,881,545
Vested and exercisable (in shares) | shares	2,884,486	3,566,091
Weighted- Average Exercise Price Per Share
Balance - beginning of period (in dollars per share) | $ / shares	$ 7.50
Stock options exercised (in dollars per share) | $ / shares	7.73
Stock options forfeited and expired (in dollars per share) | $ / shares	10.95
Balance - end of period (in dollars per share) | $ / shares	7.41	$ 7.50
Vested and exercisable (in dollars per share) | $ / shares	$ 7.40	$ 7.22
Weighted- Average Remaining Contractual Term (In Years)
Balance	4 years 1 month 6 days	4 years 9 months 18 days
Vested and exercisable	4 years 1 month 6 days	4 years 8 months 12 days
Aggregate Intrinsic Value
Balance | $	$ 1,482,829	$ 1,405,540
Vested and exercisable | $	$ 1,482,299	$ 1,292,303

Equity Incentive Plans and Em_5

Equity Incentive Plans and Employee Stock Purchase Plan - Restricted Stock Units, Additional Information (Details) - Restricted Stock Units (RSUs)	9 Months Ended
	Oct. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
One Year Anniversary
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Vesting rights percentage	25.00%
13 to 36 Months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights percentage	75.00%

Equity Incentive Plans and Em_6

Equity Incentive Plans and Employee Stock Purchase Plan - Schedule of Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs)	9 Months Ended
	Oct. 31, 2021$ / sharesshares
Shares
Unvested - beginning of period (in shares) | shares	3,473,512
RSUs granted (in shares) | shares	1,422,325
RSUs vested (in shares) | shares	(1,070,507)
RSUs forfeited and canceled (in shares) | shares	(335,347)
Unvested - end of period (in shares) | shares	3,489,983
Weighted-Average Grant Date Fair Value per RSU
Unvested - beginning of period (in dollars per share) | $ / shares	$ 139.68
RSUs granted (in dollars per share) | $ / shares	386.88
RSUs vested (in dollars per share) | $ / shares	142.93
RSUs forfeited and canceled (in dollars per share) | $ / shares	182.95
Unvested - end of period (in dollars per share) | $ / shares	$ 235.27

Equity Incentive Plans and Em_7

Equity Incentive Plans and Employee Stock Purchase Plan - Employee Stock Purchase Plan, Additional Information (Details) - Employee Stock Purchase Plan - shares	1 Months Ended
	Jun. 30, 2021	Oct. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum employee contribution rate		15.00%
Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock under the Employee Stock Purchase Plan (in shares)	45,261

Equity Incentive Plans and Em_8

Equity Incentive Plans and Employee Stock Purchase Plan - Stock-based Compensation Expense Recognized in Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 68,708	$ 39,952	$ 177,327	$ 108,044
Cost of revenue—subscription
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	3,934	2,446	10,322	6,508
Cost of revenue—services
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	1,521	1,513	4,473	4,142
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	24,790	14,696	64,749	38,754
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	29,205	15,442	73,227	41,415
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 9,258	$ 5,855	$ 24,556	$ 17,225

Net Loss Per Share - Additional

Net Loss Per Share - Additional Information (Details) - Convertible Debt	Oct. 31, 2021$ / shares
2024 Notes
Class of Stock [Line Items]
Initial conversion price (in dollars per share)	$ 68.15
2026 Notes
Class of Stock [Line Items]
Initial conversion price (in dollars per share)	$ 211.20

Net Loss Per Share - Schedule o

Net Loss Per Share - Schedule of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Oct. 31, 2021	Jul. 31, 2021	Apr. 30, 2021	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2020	Oct. 31, 2021	Oct. 31, 2020
Numerator:
Net loss	$ (81,293)	$ (77,133)	$ (63,992)	$ (72,651)	$ (64,525)	$ (53,967)	$ (222,418)	$ (191,143)
Denominator:
Weighted-average shares used to compute net loss per share, basic and diluted (in shares)	66,386,379			59,368,167			63,750,884	58,476,521
Net loss per share, basic and diluted (in dollars per share)	$ (1.22)			$ (1.22)			$ (3.49)	$ (3.27)

Net Loss Per Share - Schedule_2

Net Loss Per Share - Schedule of Antidilutive Securities Excluded from the Computation of Diluted Net Loss per Share (Details) - shares	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	12,124,969	9,716,110	12,794,915	10,299,249
Stock options to purchase common stock | Class A Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	722,070	1,234,642	818,589	1,434,388
Stock options to purchase common stock | Class B Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	2,250,736	3,614,730	2,476,270	4,013,050
Unvested restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	3,679,734	3,938,037	3,745,955	4,004,267
Early exercised stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	0	2,831	136	6,418
Shares underlying the conversion option of the 2024 Notes (conversion spread only prior to the adoption of ASU 2020-06) | 2024 Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	27,337	925,870	308,849	841,126
Shares underlying the conversion option of the 2024 Notes (conversion spread only prior to the adoption of ASU 2020-06) | 2026 Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	5,445,092	0	5,445,116	0

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020	Jan. 31, 2021
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 2,249	$ 926	$ 2,411	$ 2,142
Unrecognized tax benefits					$ 17,500