Datadog (DDOG) 10-K 25 Feb 22 2021 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Feb. 15, 2022	Jun. 30, 2021
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-39051
Entity Registrant Name	Datadog, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-2825503
Entity Address, Address Line One	620 8th Avenue,
Entity Address, Address Line Two	45th Floor
Entity Address, City or Town	New York,
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10018
City Area Code	866
Local Phone Number	329-4466
Title of 12(b) Security	Class A common stock, par value $0.00001 per share
Trading Symbol	DDOG
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 24,470
Documents Incorporated by Reference	Portions of the registrant’s Proxy Statement for its 2022 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent stated herein. Such Proxy Statement will be filed with the Securities and Exchange Commission within 120 days of the registrant’s fiscal year ended December 31, 2021.
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0001561550
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		264,288,799
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		49,620,900

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2021
Auditor Information [Abstract]
Auditor Name	Deloitte & Touche LLP
Auditor Firm ID	34
Auditor Location	New York, New York

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 270,973	$ 224,927
Marketable securities	1,283,473	1,292,532
Accounts receivable, net of allowance for credit losses of $2,997 and $2,468 as of December 31, 2021 and 2020, respectively	268,824	163,359
Deferred contract costs, current	23,235	13,638
Prepaid expenses and other current assets	24,443	23,624
Total current assets	1,870,948	1,718,080
Property and equipment, net	75,152	47,197
Operating lease assets	61,355	57,829
Goodwill	292,176	17,609
Intangible assets, net	15,704	2,069
Deferred contract costs, non-current	42,062	26,750
Restricted cash	3,490	3,784
Other assets	19,907	16,967
TOTAL ASSETS	2,380,794	1,890,285
CURRENT LIABILITIES:
Accounts payable	25,270	21,342
Accrued expenses and other current liabilities	111,284	55,351
Operating lease liabilities, current	20,157	16,326
Deferred revenue, current	371,985	204,825
Total current liabilities	528,696	297,844
Operating lease liabilities, non-current	52,106	51,433
Convertible senior notes, net	735,482	575,864
Deferred revenue, non-current	13,896	3,450
Other liabilities	9,411	4,262
Total liabilities	1,339,591	932,853
COMMITMENTS AND CONTINGENCIES (NOTE 10)
STOCKHOLDERS' EQUITY:
Additional paid-in capital	1,197,136	1,103,305
Accumulated other comprehensive (loss) income	(3,830)	2,287
Accumulated deficit	(152,106)	(148,163)
Total stockholders’ equity	1,041,203	957,432
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	2,380,794	1,890,285
Class A Common Stock
STOCKHOLDERS' EQUITY:
Common stock, value	2	2
Class B Common Stock
STOCKHOLDERS' EQUITY:
Common stock, value	$ 1	$ 1

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounts receivable, allowance for credit losses	$ 2,997	$ 2,468
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares issued (in shares)	263,339,585	218,510,509
Common stock, shares outstanding (in shares)	263,339,585	218,510,509
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	310,000,000	310,000,000
Common stock, shares issued (in shares)	50,025,852	87,369,554
Common stock, shares outstanding (in shares)	50,025,852	87,369,554

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue	$ 1,028,784	$ 603,466	$ 362,780
Cost of revenue	234,245	130,197	88,949
Gross profit	794,539	473,269	273,831
Operating expenses:
Research and development	419,769	210,626	111,425
Sales and marketing	299,497	213,660	146,657
General and administrative	94,429	62,756	35,889
Total operating expenses	813,695	487,042	293,971
Operating loss	(19,156)	(13,773)	(20,140)
Other income (loss):
Interest expense	(21,052)	(30,434)	(32)
Interest income and other income, net	21,786	21,985	4,196
Other income (loss), net	734	(8,449)	4,164
Loss before income taxes	(18,422)	(22,222)	(15,976)
Provision for income taxes	(2,323)	(2,325)	(734)
Net loss	(20,745)	(24,547)	(16,710)
Net loss attributable to common stockholders, basic	(20,745)	(24,547)	(16,710)
Net loss attributable to common stockholders, diluted	$ (20,745)	$ (24,547)	$ (16,710)
Basic net loss per share (in dollars per share)	$ (0.07)	$ (0.08)	$ (0.12)
Diluted net loss per share (in dollars per share)	$ (0.07)	$ (0.08)	$ (0.12)
Weighted average shares used in calculating basic net loss per share (in shares)	309,048	300,350	139,873
Weighted average shares used in calculating diluted net loss per share (in shares)	309,048	300,350	139,873

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (20,745)	$ (24,547)	$ (16,710)
Other comprehensive (loss) income:
Foreign currency translation adjustments	(1,853)	1,089	55
Unrealized (loss) gain on available-for-sale marketable securities	(4,264)	1,065	47
Other comprehensive (loss) income	(6,117)	2,154	102
Comprehensive loss	$ (26,862)	$ (22,393)	$ (16,608)

CONSOLIDATED STATEMENTS OF CONV

CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjusted Balance	Cumulative Effect, Period of Adoption, Adjustment	Third-Party Tender Offer	Initial Public Offering	Common Stock	Common StockThird-Party Tender Offer	Common StockConvertible Preferred Stock	Common StockConvertible Preferred StockThird-Party Tender Offer	Common StockConvertible Preferred StockInitial Public Offering	Common StockClass A and Class B Common Stock	Common StockClass A and Class B Common StockCumulative Effect, Period of Adoption, Adjusted Balance	Common StockClass A and Class B Common StockInitial Public Offering	Additional Paid-in Capital	Additional Paid-in CapitalCumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-in CapitalCumulative Effect, Period of Adoption, Adjustment	Additional Paid-in CapitalThird-Party Tender Offer	Additional Paid-in CapitalInitial Public Offering	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss)Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Deficit	Accumulated DeficitCumulative Effect, Period of Adoption, Adjusted Balance	Accumulated DeficitCumulative Effect, Period of Adoption, Adjustment
Convertible preferred stock, beginning balance (in shares) at Dec. 31, 2018								179,814,912
Convertible preferred stock, ending balance (in shares) at Dec. 31, 2019								0
Convertible preferred stock, beginning balance at Dec. 31, 2018								$ 140,805
Convertible preferred stock, ending balance at Dec. 31, 2019								$ 0
Beginning balance at Dec. 31, 2018	$ (76,041)										$ 0			$ 30,834					$ 31		$ (106,906)
Beginning balance (in shares) at Dec. 31, 2018						78,180,606					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock (in shares)						10,117,557					429,430
Issuance of common stock upon exercise of stock options	7,173													7,173
Vesting of early exercised stock options	1,883													1,883
Issuance of restricted shares of common stock (in shares)											244,445
Stock-based compensation	19,235													19,235
Reclassification or conversion of share (in shares)						89,101,644	803,481		803,481	179,011,431	89,101,644		179,011,431
Reclassification or conversion of stock				$ 53	$ 140,752				$ (53)	$ (140,752)			$ 2				$ 53	$ 140,750
Issuance of class A common stock in connection with initial public offering, net of underwriting discounts and issuance costs (in shares)											27,600,000
Issuance of class A common stock in connection with initial public offering, net of underwriting discounts and issuance costs	705,894										$ 1			705,893
Other comprehensive (loss) income	102																		102
Net loss	(16,710)																				(16,710)
Ending balance (in shares) at Dec. 31, 2019											296,386,950
Ending balance at Dec. 31, 2019	$ 782,341										$ 3			905,821					133		(123,616)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock (in shares)	8,753,274										8,753,274
Issuance of common stock upon exercise of stock options	$ 16,009													16,009
Vesting of early exercised stock options	1,177													1,177
Vesting of restricted stock units (in shares)											170,892
Issuance of restricted shares of common stock (in shares)											120,992
Issuance of restricted shares of common stock	5,169													5,169
Issuance of common stock under the Employee Stock Purchase Plan (in shares)											447,955
Issuance of common stock under the Employee Stock Purchase Plan	13,906													13,906
Stock-based compensation	77,778													77,778
Equity component of 2025 Convertible Senior Notes, net	173,070													173,070
Purchases of capped calls related to 2025 Convertible Senior Notes	(89,625)													(89,625)
Other comprehensive (loss) income	2,154																		2,154
Net loss	$ (24,547)																				(24,547)
Accounting Standards Update [Extensible Enumeration]	ASU No. 2020-06
Ending balance (in shares) at Dec. 31, 2020											305,880,063	305,880,063
Ending balance at Dec. 31, 2020	$ 957,432	$ 801,164	$ (156,268)								$ 3	$ 3		1,103,305	$ 930,235	$ (173,070)			2,287	$ 2,287	(148,163)	$ (131,361)	$ 16,802
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock (in shares)	5,109,688										5,109,688
Issuance of common stock upon exercise of stock options	$ 14,941													14,941
Vesting of early exercised stock options	566													566
Vesting of restricted stock units (in shares)											1,483,639
Issuance of restricted shares of common stock (in shares)											600,176
Issuance of restricted shares of common stock	57,720													57,720
Issuance of common stock under the Employee Stock Purchase Plan (in shares)											291,871
Issuance of common stock under the Employee Stock Purchase Plan	20,278													20,278
Stock-based compensation	173,397													173,397
Other comprehensive (loss) income	(6,117)																		(6,117)
Net loss	(20,745)																				(20,745)
Ending balance (in shares) at Dec. 31, 2021											313,365,437
Ending balance at Dec. 31, 2021	$ 1,041,203										$ 3			$ 1,197,136					$ (3,830)		$ (152,106)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (20,745)	$ (24,547)	$ (16,710)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	22,938	15,450	12,370
Amortization of discounts or premiums on marketable securities	16,236	9,753	12
Amortization of debt discount and issuance costs	3,349	18,727	0
Amortization of deferred contract costs	17,866	10,447	5,400
Stock-based compensation, net of amounts capitalized	163,737	74,374	19,034
Non-cash lease expense	17,201	14,060	11,763
Allowance for credit losses on accounts receivable	2,311	3,283	1,195
Loss on disposal of property and equipment	274	10	708
Changes in operating assets and liabilities:
Accounts receivable, net	(107,112)	(64,248)	(47,510)
Deferred contract costs	(42,775)	(25,080)	(20,146)
Prepaid expenses and other current assets	(737)	(4,403)	(10,046)
Other assets	(2,627)	968	(8,486)
Accounts payable	3,078	6,539	2,484
Accrued expenses and other liabilities	37,270	3,970	6,376
Deferred revenue	176,281	69,788	67,790
Net cash provided by operating activities	286,545	109,091	24,234
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of marketable securities	(1,125,519)	(1,794,562)	(176,639)
Maturities of marketable securities	1,046,560	506,554	0
Proceeds from sale of marketable securities	67,749	163,630	0
Purchases of property and equipment	(9,956)	(5,415)	(13,315)
Capitalized software development costs	(26,069)	(20,468)	(10,128)
Cash paid for acquisition of businesses; net of cash acquired	(226,505)	(2,363)	(2,138)
Net cash used in investing activities	(273,740)	(1,152,624)	(202,220)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercise of stock options	14,907	15,985	7,899
Proceeds from initial public offering, net of underwriting discounts and commissions and other offering costs	0	(421)	706,317
Proceeds from issuance of common stock under the employee stock purchase plan	20,278	15,170	0
Employee payroll taxes paid related to net share settlement under the employee stock purchase plan	(245)	(1,040)	0
Proceeds from issuance of convertible senior notes, net of issuance costs	0	730,207	0
Purchase of capped call related to convertible senior notes	0	(89,625)	0
Net cash provided by financing activities	34,940	670,276	714,216
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(1,993)	779	(21)
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	45,752	(372,478)	536,209
CASH, CASH EQUIVALENTS AND RESTRICTED CASH—Beginning of period	228,711	601,189	64,980
CASH, CASH EQUIVALENTS AND RESTRICTED CASH —End of period	274,463	228,711	601,189
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for income taxes	1,486	410	143
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Accrued property and equipment purchases	1,746	234	315
Stock-based compensation included in capitalized software development costs	9,660	3,404	201
Vesting of early exercised options	566	1,177	1,883
Costs related to initial public offering included in accounts payable and accrued liabilities	0	0	423
Issuance of restricted shares of common stock for the acquisition of businesses	57,720	5,169	0
Acquisition holdback	5,555	1,500	0
RECONCILIATION OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH WITHIN THE CONSOLIDATED BALANCE SHEETS TO THE AMOUNTS SHOW IN THE STATEMENTS OF CASH FLOWS ABOVE:
Cash and cash equivalents	270,973	224,927	597,297
Restricted cash – Including amounts in prepaid expense and other current assets and other assets	3,490	3,784	3,892
Total cash, cash equivalents and restricted cash	$ 274,463	$ 228,711	$ 601,189

Organization and Description of

Organization and Description of Business	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Description of Business	Organization and Description of Business Description of Business Datadog, Inc. (“Datadog” or the “Company”) was incorporated in the State of Delaware on June 4, 2010. The Company is the monitoring and analytics platform for developers, IT operations teams and business users in the cloud age. The Company’s SaaS platform integrates and automates infrastructure monitoring, application performance monitoring, log management and security monitoring, to provide unified, real-time observability of its customers’ entire technology stack. The Company is headquartered in New York City and has various other global office locations.

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). Principles of Consolidation The consolidated financial statements include the accounts of Datadog, Inc. and its wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. Initial Public Offering On September 23, 2019, the Company completed its initial public offering (“IPO”), in which the Company issued and sold 24,000,000 shares of its Class A common stock at a public offering price of $27.00 per share, which resulted in net proceeds of $615.6 million after deducting underwriting discounts and commissions. On September 25, 2019, the underwriters exercised their option to purchase an additional 3,600,000 shares of Class A common stock at $27.00 per share, resulting in additional proceeds of $92.3 million, net of underwriters’ discounts and commissions. Immediately prior to the closing of the IPO, all shares of common stock then outstanding were reclassified as Class B common stock and all shares of the convertible preferred stock then outstanding automatically converted into 179,011,431 shares of Class B common stock. The Company incurred $2.0 million of net offering costs in connection with the IPO which were recorded as an offset against IPO proceeds. Stock Split and Authorized Shares On September 6, 2019, the Board and stockholders approved an amended and restated certificate of incorporation of the Company effecting a 3-for-1 stock split of the Company’s issued and outstanding shares of common stock and convertible preferred stock, and an increase to the authorized shares of the Company’s common stock and convertible preferred stock to 380,000,000 shares and 179,814,912 shares, respectively. The split was effected on September 6, 2019 and without any change in the par value per share. All information related to the Company’s common stock, convertible preferred stock and stock awards has been retroactively adjusted to give effect to 3-for-1 stock split on September 6, 2019. On September 23, 2019, an amended and restated certificate of incorporation of the Company was filed immediately prior to the closing of the IPO authorizing an aggregate of 2,330,000,000 shares of capital stock of the Company, including 2,000,000,000 shares of Class A common stock, 310,000,000 shares of Class B common stock and 20,000,000 shares of preferred stock. Segment Information The Company has a single operating and reportable segment as well as one business activity, monitoring and providing analytics on companies’ information technology (“IT”) infrastructure. The Company’s chief operating decision maker is its Chief Executive Officer, who reviews financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance, and allocating resources. There are no segment managers who are held accountable for operations or results below the consolidated level. Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Such estimates include the fair value of marketable securities, the allowance for credit losses , the fair value of acquired assets and assumed liabilities from business combinations, useful lives of property, equipment, software, and finite lived intangibles, stock-based compensation, stock-based compensation including the determination of the fair value of the Company’s stock prior to its IPO, fair value of common stock and redeemable convertible preferred stock prior to the IPO, valuation of long-lived assets and their recoverability, including goodwill, the incremental borrowing rate for operating leases, estimated expected period of benefit period for deferred contract costs, fair value of the liability component of the convertible debt, realization of deferred tax assets and uncertain tax positions, revenue recognition and the allocation of overhead costs between cost of revenue and operating expenses. The Company bases its estimates on historical experience and also on assumptions that management considers reasonable. The Company assesses these estimates on a regular basis; however, actual results could materially differ from these estimates. Foreign Currency Translation The reporting currency of the Company is the United States dollar (“USD”). The functional currency of the Company is USD, and the functional currency of the Company’s subsidiaries is generally the local currency of the jurisdiction in which the foreign subsidiary is located. The assets and liabilities of the Company’s subsidiaries are translated to USD at exchange rates in effect at the balance sheet date. All income statement accounts are translated at monthly average exchange rates. Resulting foreign currency translation adjustments are recorded directly in accumulated other comprehensive (loss) income as a separate component of stockholders’ equity. Transaction gains and losses that arise from exchange rate fluctuations on transactions denominated in a currency other than the functional currency are included in other income (loss), net in the accompanying consolidated statements of operations when realized. Revenue Recognition The Company generates revenue from the sale of subscriptions to customers using its cloud-based platform. The terms of the Company’s subscription agreements are primarily monthly, annual or multi-year. The Company’s customers can enter into (1) a subscription agreement for a committed contractual amount of usage that is apportioned ratably on a monthly basis over the term of the subscription period, (2) a subscription agreement for a committed contractual amount of usage that is delivered as used, or (3) a monthly subscription based on usage. The Company typically bills customers on an annual or multi-year subscription in advance, with any usage in excess of the committed contracted amount billed monthly in arrears. The Company typically bills customers on a monthly plan in arrears. Customers also have the option to purchase additional services priced at rates at or above the stand-alone selling price. The Company accounts for revenue contracts with customers through the following steps: (1) identify the contract with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when or as the Company satisfies a performance obligation. The Company’s revenue arrangements may include infrastructure monitoring, application performance monitoring, log management, synthetics monitoring, security monitoring, continuous profiling, serverless monitoring, network monitoring, real user monitoring and incident management as well as secondary services including custom metrics in dashboard monitoring, docker container monitoring, and indexed spans. The Company has identified each service as a separate performance obligation. The transaction price is based on the fixed price for the contracted level of service plus variable consideration for additional optional purchases. Billing periods correspond to the periods over which services are performed and there are no discounts given on the purchase of future services. The Company allocates revenue to each performance obligation based on its relative standalone selling price. The Company generally determines standalone selling prices based on a range of actual prices charged to customers. Revenue is recognized when control of these services is transferred to customers, in an amount that reflects the consideration the Company expects to be entitled to receive in exchange for those services. The Company determined an output method to be the most appropriate measure of progress because it most faithfully represents when the value of the services is simultaneously received and consumed by the customer, and control is transferred. For committed contractual amounts of usage, revenue is recognized ratably over the term of the subscription agreement generally beginning on the date that the platform is made available to a customer. For committed contractual amount of usage that is delivered as used, a monthly subscription based on usage, or usage in excess of a ratable subscription, the Company recognizes revenue as the product is used. Subscription revenue excludes sales and other indirect taxes. The Company applied the practical expedient in Topic 606 and did not evaluate contracts of one year or less for the existence of a significant financing component. Deferred Revenue and Remaining Performance Obligations Certain of the Company’s customers pay in advance of satisfaction of performance obligations and other customers with monthly contract terms are billed in arrears on a monthly basis. The Company records contract liabilities to deferred revenue when customers are billed or when the Company receives customer payments in advance of the performance obligations being satisfied on the Company’s contracts. 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. Convertible Senior Notes In accounting for the issuance of the Company’s convertible senior notes (the “2025 Notes”), the 2025 Notes were separated into liability and equity components through December 31, 2020. The carrying amounts of the liability component was calculated by measuring the fair value of similar liabilities that do not have associated convertible features. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the par value of the respective 2025 Notes. This difference represents the debt discount that is amortized to interest expense over the contractual terms of the 2025 Notes using the effective interest rate method. The equity component was recorded in additional paid-in capital. In accounting for the debt issuance costs related to the 2025 Notes, the Company allocated the total amount incurred to the liability and equity components of the 2025 Notes in the same proportion as the allocation of the proceeds. Issuance costs attributable to the liability component are being amortized to interest expense over the contractual terms of the 2025 Notes. The issuance costs attributable to the equity component were netted against the equity component in additional paid-in capital. On January 1, 2021 the Company adopted ASU No. 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity . As a result of the adoption, the debt conversion option of $177.2 million and debt issuance costs of $4.1 million previously attributable to the equity component are no longer presented in equity. Similarly, the debt discount, that is equal to the carrying value of the embedded conversion feature upon issuance, is no longer amortized into income as interest expense over the life of the instrument. This resulted in a $16.8 million decrease to the opening balance of accumulated deficit, a $173.1 million decrease to the opening balance of additional paid-in capital and a $156.3 million increase to the opening balance of convertible senior notes, net on the consolidated balance sheet. Cost of Revenue Cost of revenue consists primarily of costs related to providing subscription services to paying customers, including data center and networking expenses, employee compensation (including stock-based compensation) and other employee-related expenses for customer experience and technical operations staff, payments to outside service providers, payment processing fees, amortization of capitalized internally developed software costs and acquired developed technology, and allocated overhead costs. Research and Development Costs Research and development costs are expensed as incurred. Research and development costs consist of employee compensation (including stock-based compensation) and other employee-related expenses, materials and supplies, and allocated overhead costs such as rent and facilities costs. Sales and Marketing Costs Sales and marketing costs consist primarily of personnel costs for the Company’s sales and marketing organization, including stock-based compensation and commissions, costs of general marketing and promotional activities, including the free tier and introductory trials of the Company’s products, travel-related expenses and allocated overhead costs. Advertising Costs Advertising costs are expensed as incurred and were approximately $20.8 million, $21.6 million and $9.5 million for the years ended December 31, 2021, 2020 and 2019, respectively, and are included in sales and marketing expense in the accompanying consolidated statement of operations. Income Taxes The Company recognizes deferred tax assets and liabilities for the expected future tax consequences of temporary differences between the carrying amounts for financial reporting and the tax bases of assets and liabilities. The deferred assets and liabilities are recorded at the statutorily enacted tax rates anticipated to be in effect when such temporary differences reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period that includes the enactment date. A valuation allowance is established; when based upon the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. The Company engages in transactions in which the tax consequences may be subject to uncertainty. The Company accounts for uncertain tax positions based on an evaluation as to whether it is more likely than not that a tax position will be sustained on audit, including resolution of any related appeals or litigation processes. This evaluation is based on all available evidence and assumes that the appropriate tax authorities have full knowledge of all relevant information concerning the tax position. The Company accounts for uncertain tax positions as non-current tax liabilities or through a reduction of a corresponding deferred tax asset. The tax benefit recognized is based on the largest amount that is greater than 50% likely of being realized upon ultimate settlement. The Company includes potential interest expense and penalties related to its uncertain tax positions in income tax expense. Stock-Based Compensation The Company recognizes and measures compensation expense for all stock-based payment awards granted to employees, directors, and nonemployees, including stock options, restricted stock units (“RSUs”), and the employee stock purchase plan (the “ESPP”) based on the fair value of the awards on the date of grant. The fair value of each stock option granted is estimated using the Black-Scholes option pricing model. The determination of the grant date fair value using an option-pricing model is affected by the estimated fair value of the Company’s common stock as well as assumptions regarding a number of other complex and subjective variables. These variables include expected stock price volatility over the expected term of the award, actual and projected employee stock option exercise behaviors, the risk-free interest rate for the expected term of the award and expected dividends. The fair value of RSUs is determined by the closing price on the date of grant of the Company’s Class A common stock, as reported on The Nasdaq Global Select Market. The Company estimates the fair value of the rights to acquire stock under the ESPP using the Black-Scholes option pricing model. Stock-based compensation is recognized on a straight-line basis over the requisite service period and account for forfeitures as they occur. The Company also has certain options that have performance-based vesting conditions; stock-based compensation expense for such awards is recognized on a straight-line basis from the time the vesting condition is likely to be met through the time the vesting condition has been achieved. Cash and Cash Equivalents The Company considers all highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents. Cash equivalents consist of funds deposited into money market funds. Marketable Securities The Company’s marketable securities consist of commercial debt securities, U.S. government treasury securities, Non-U.S. government securities, and commercial paper. The Company determines the appropriate classification of its marketable securities at the time of purchase and reevaluates such designation at each balance sheet date. The Company has classified and accounted for its marketable securities as available-for-sale securities as the Company may sell these securities at any time for use in its current operations or for other purposes, even prior to maturity. As a result, the Company classifies its marketable securities within current assets on the consolidated balance sheet. Available-for-sale securities are recorded at fair value each reporting period. Premiums and discounts are amortized or accreted over the life of the related available-for-sale security as an adjustment to yield using the effective interest method. Interest income is recognized when earned. Unrealized gains and losses on these marketable securities are presented net of tax and reported as a separate component of accumulated other comprehensive income until realized. Realized gains and losses are determined based on the specific identification method and are reported in Interest income and other income, net in the consolidated statements of operations. The Company periodically evaluates its marketable securities to assess whether an investment’s fair value is less than its amortized cost basis and if the decline in the fair value is attributable to a credit loss. Declines in fair value judged to be related to credit loss are reported in Interest income and other income, net in the consolidated statements of operations. Restricted Cash Restricted cash primarily consists of collateralized letters of credit established in connection with lease agreements for the Company’s facilities. Restricted cash is included in current assets for leases that expire within one year and is included in non-current assets for leases that expire in more than one year from the balance sheet date. Concentration of Credit Risk Financial instruments that potentially subject the Company to credit risk primarily consist of cash and cash equivalents, marketable securities and accounts receivable. Cash deposits may, at times, exceed amounts insured by the Federal Deposit Insurance Corporation (“FDIC”) and the Securities Investor Protection Corporation (“SIPC”). The Company has not experienced any losses on its deposits of cash and cash equivalents to date. For accounts receivable, the Company is exposed to credit risk in the event of nonpayment by customers to the extent of the amounts recorded on the accompanying consolidated balance sheets. Geographical Information - Long-Lived Assets As of December 31, 2021, and 2020, 76% and 68% of the Company’s long lived assets were located in the United States and 24% and 32% were located outside of the United States, respectively. Fair Value of Financial Instruments The accounting guidance for fair value provides a framework for measuring fair value, clarifies the definition of fair value, and expands disclosures regarding fair value measurements. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the reporting date. The accounting guidance establishes a three-tiered hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value as follows: Level 1 Inputs: Unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date. Level 2 Inputs: Other than quoted prices included in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability. Level 3 Inputs: Unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at measurement date. The Company’s financial instruments consist of cash equivalents, marketable securities, accounts receivable, accounts payable and accrued expenses. Cash equivalents are stated at amortized cost, which approximates fair value at the balance sheet dates, due to the short period of time to maturity. Marketable securities are recorded at fair value. Accounts receivable, accounts payable, and accrued expenses are stated at their carrying value, which approximates fair value due to the short time to the expected receipt or payment date. A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Accounts Receivable and Allowance for Credit Losses Accounts receivable includes billed and unbilled receivables. Trade accounts receivable are recorded at invoiced amounts and do not bear interest. The expectation of collectability is based on a review of credit profiles of customers, contractual terms and conditions, current economic trends, and historical payment experience. The Company regularly reviews the adequacy of the allowance for credit losses by considering the age of each outstanding invoice and the collection history to determine the appropriate amount of allowance for credit losses. Accounts receivable deemed uncollectible are charged against the allowance for credit losses when identified. Unbilled accounts receivable represents revenue recognized on contracts for which billings have not yet been presented to customers because the amounts were earned but not contractually billable as of the balance sheet date, substantially all of which is expected to be billed and collected within one year. Internal Use Software Development Costs The Company capitalizes qualifying internal use software development costs related to its cloud platform. The costs consist of personnel costs (including related benefits and stock-based compensation) that are incurred during the application development stage. Capitalization of costs begins when two criteria are met: (1)the preliminary project stage is completed, and (2) it is probable that the software will be completed and used for its intended function. Capitalization ceases when the software is substantially complete and ready for its intended use, including the completion of all significant testing. Costs related to preliminary project activities and post implementation operating activities are expensed as incurred. Capitalized costs are included in property and equipment. These costs are amortized over the estimated useful life of the software, which is two years, on a straight-line basis, which represents the manner in which the expected benefit will be derived. The amortization of costs related to the platform applications is included in cost of revenue and sales and marketing expense based on an allocation between paid customer accounts and free customer accounts not generating revenue. Property and Equipment, Net Property and equipment, net is stated at cost less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful life of the related asset. Expenses that improve an asset or extend its remaining useful life are capitalized. Costs of maintenance or repairs that do not extend the lives of the respective assets are charged to expenses as incurred. Deferred Contract Costs Sales commissions earned by the Company’s sales force are considered incremental and recoverable costs of obtaining a contract with a customer. There are no sales commissions earned on renewals . These costs are deferred and then amortized over a period of benefit which is determined to be four years. The Company determined the period of benefit by taking into consideration the length of terms in its customer contracts, life of the technology and other factors . Amounts expected to be recognized within one year of the balance sheet date are recorded as deferred contract costs, current; the remaining portion is recorded as deferred contract costs, non-current, in the consolidated balance sheets. Deferred contract costs are periodically analyzed for impairment. Amortization expense is included in sales and marketing expenses in the accompanying consolidated statements of operations. Business Combinations When the Company acquires a business, the purchase consideration is allocated to the tangible assets acquired, liabilities assumed, and intangible assets acquired based on their estimated respective fair values. The excess of the fair value of purchase consideration over the fair values of these identifiable assets and liabilities is recorded as goodwill. Such valuations require the Company to make significant estimates and assumptions, especially with respect to intangible assets. Significant estimates in valuing certain intangible assets include, but are not limited to, future expected cash flows from acquired users, acquired technology, and trade names from a market participant perspective, useful lives and discount rates. The Company’s estimates of fair value are based upon assumptions believed to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates. During the measurement period, the Company may record adjustments to the assets acquired and liabilities assumed, with the corresponding offset to goodwill. Upon the conclusion of the measurement period, any subsequent adjustments are recorded to other income, net in the consolidated statement of operations. Accounting for Impairment of Long-Lived Assets (Including Goodwill and Intangibles) Long-lived assets with finite lives include property and equipment, capitalized development software costs and acquired intangible assets. Long-lived assets are amortized over their estimated useful lives which are as follows: Computers and equipment 3 years Furniture and fixtures 5 years Leasehold improvements Shorter of lease term or useful life of asset Capitalized software development costs 2 years Developed technology 3 years Customer relationships 4 years The Company evaluates long lived assets, including acquired intangible assets and capitalized software development costs, for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable or the estimated useful life becomes shorter than originally estimated. Recoverability of assets held and used is measured by comparison of the carrying amount of an asset or an asset group to estimated undiscounted future net cash flows expected to be generated by the asset or asset group. If the carrying amount of an asset exceeds these estimated future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the assets exceeds the fair value of the asset or asset group, based on discounted cash flows. Goodwill is not amortized but rather tested for impairment at least annually on October 1, or more frequently if events or changes in circumstances indicate that goodwill may be impaired. Goodwill impairment is recognized when the quantitative assessment results in the carrying value exceeding the fair value, in which case an impairment charge is recorded to the extent the carrying value exceeds the fair value. The Company did not recognize any impairment of goodwill during the years ended December 31, 2021, 2020 or 2019. Operating Leases The Company determines if an arrangement is a lease at inception. Operating lease assets and liabilities are reflected within operating lease assets, operating lease liabilities, current, and operating lease liabilities, non-current, on the consolidated balance sheets. For short-term leases (an initial term of 12 months or less), an operating lease asset and corresponding lease liability are not recorded and the Company records rent expense in its consolidated statements of operations on a straight-line basis over the lease term. Operating lease assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of the Company’s leases do not provide an implicit rate, the Company generally uses its incremental borrowing rate based on the estimated rate of interest for collateralized borrowing over a similar term of the lease payments at commencement date. The operating lease assets also include any lease payments made and excludes lease incentives. The Company’s lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company has lease agreements with lease and non-lease components, which are accounted for separately. Net Income (Loss) Per Share Attributable to Common Stockholders Basic net income (loss) per share is computed by dividing net income (loss) by the weighted-average number of shares of common stock outstanding during the period. Diluted net income (loss) per share is computed by dividing net income (loss) by the weighted-average number of shares of common stock outstanding during the period giving effect to all potentially dilutive securities to the extent they are dilutive. The dilutive effect of potentially dilutive securities is reflected in diluted net income (loss) per share by application of the two-class method. During the periods when the Company is in a net loss position, the net loss attributable to common stockholders was not allocated to the convertible preferred stock and unvested common stock under the two-class method as these securities do not have a contractual obligation to share in the Company’s losses. Accounting Pronouncements Recently Adopted In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU No. 2016-13”), which requires an entity to utilize a new impairment model known as the current expected credit loss (“CECL”) model to estimate its lifetime “expected credit loss” and record an allowance that, when deducted from the amortized cost basis of the financial asset, presents the net amount expected to be collected on the financial asset. The CECL model is expected to result in more timely recognition of credit losses. Additionally, ASU No. 2016-13 amends the current available-for-sale security impairment model for debt securities held for investment. The new model will require an estimate of expected credit losses when the fair value is below the amortized cost of the asset. The credit-related impairment (and subsequent recoveries) are recognized as an allowance on the balance sheet with a corresponding adjustment to the income statement. Non-credit related losses will continue to be recognized through Other Comprehensive Income (Loss) (“OCI”). This guidance also requires new disclosures for financial assets measured at amortized cost, loans and available-for-sale debt securities. Entities will apply the standard’s provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. The Company adopte

Marketable Securities

Marketable Securities	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Marketable Securities	Marketable Securities The following is a summary of available-for-sale marketable securities, excluding those securities classified within cash and cash equivalents on the consolidated balance sheet as of December 31, 2021 and December 31, 2020 (in thousands): December 31, 2021 Amortized Unrealized Unrealized Fair Commercial debt securities $ 1,034,573 $ 43 $ (2,564) $ 1,032,052 Certificates of deposit 14,574 5 (10) 14,569 U.S. government treasury securities 77,628 18 (204) 77,442 Commercial paper 151,379 14 (37) 151,356 Non-U.S. government securities 8,071 — (17) 8,054 Marketable securities $ 1,286,225 $ 80 $ (2,832) $ 1,283,473 December 31, 2020 Amortized Unrealized Unrealized Fair Commercial debt securities $ 926,836 $ 1,157 $ (143) $ 927,850 Certificates of deposit 47,214 43 (1) 47,256 U.S. government treasury securities 108,092 203 (1) 108,294 Commercial paper 209,111 32 (11) 209,132 Marketable securities $ 1,291,253 $ 1,435 $ (156) $ 1,292,532 As of December 31, 2021, the fair values of available-for-sale marketable securities, by remaining contractual maturity, were as follows (in thousands): Due within one year $ 783,342 Due in one year through five years 500,131 Total $ 1,283,473 The Company does not believe that any unrealized losses are attributable to credit-related factors based on its evaluation of available evidence. To determine whether a decline in value is related to credit loss, the Company evaluates, among other factors: the extent to which the fair value is less than the amortized cost basis, changes to the rating of the security by a rating agency and any adverse conditions specifically related to an issuer of a security or its industry. Unrealized gain and losses on marketable securities are presented net of tax.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 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 December 31, 2021 and 2020, and indicate the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands): Fair Value Measurement as of December 31, 2021 Level 1 Level 2 Level 3 Total Financial Assets: Cash equivalents: Money market funds $ 241,571 $ — $ — $ 241,571 Commercial paper — — — — Marketable Securities: Corporate debt securities — 1,032,052 — 1,032,052 Certificates of deposit — 14,569 — 14,569 U.S. government treasury securities — 77,442 — 77,442 Commercial paper — 151,356 — 151,356 Non-U.S. government securities — 8,054 — 8,054 Total financial assets $ 241,571 $ 1,283,473 $ — $ 1,525,044 Fair Value Measurement as of December 31, 2020 Level 1 Level 2 Level 3 Total Financial Assets: Cash equivalents: Money market funds $ 181,743 $ — $ — $ 181,743 Commercial paper — 25,195 — 25,195 Marketable Securities: Corporate debt securities — 927,850 — 927,850 Certificates of deposit — 47,256 — 47,256 U.S. government treasury securities — 108,294 — 108,294 Commercial paper — 209,132 — 209,132 Total financial assets $ 181,743 $ 1,317,727 $ — $ 1,499,470 The Company classifies its highly liquid money market funds within Level 1 of the fair value hierarchy because they are valued based on quoted market prices in active markets. The Company classifies its commercial paper, corporate debt securities, certificates of deposit, U.S. government treasury securities, and Non-U.S. government securities within Level 2 because they are valued using inputs other than quoted prices that are directly or indirectly observable in the market, including readily available pricing sources for the identical underlying security which may not be actively traded. In addition to its cash equivalents and marketable securities, 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 the convertible senior notes to be a Level 2 measurement due to limited trading activity of the convertible senior notes. Refer to Note 9, Convertible Senior Notes , to the consolidated financial statements for further details.

Prepaid Expenses and Other Curr

Prepaid Expenses and Other Current Assets	12 Months Ended
	Dec. 31, 2021
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid Expenses and Other Current Assets	Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets consisted of the following (in thousands): December 31, December 31, General prepaid expenses $ 13,698 $ 8,224 Other receivables 6,768 7,836 Rent 2,092 336 Hosting 1,805 7,196 Marketing 80 32 Total prepaid expenses and other current assets $ 24,443 $ 23,624

Property and Equipment, Net

Property and Equipment, Net	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Property and Equipment, Net	Property and Equipment, Net Property and equipment, net consisted of the following (in thousands): December 31, December 31, Computers and equipment $ 16,885 $ 11,490 Furniture and fixtures 6,595 5,087 Leasehold improvements 20,669 17,639 Capitalized software development costs 86,189 48,502 Total property and equipment $ 130,338 $ 82,718 Less: accumulated depreciation and amortization (55,186) (35,521) Total property and equipment, net $ 75,152 $ 47,197 As discussed in Note 2, Basis of Presentation and Summary of Significant Accounting Policies —Internal Use Software Development Costs, the Company capitalizes costs related to the development of computer software for internal use and is included in capitalized software development costs within property and equipment, net. Depreciation and amortization expense was approximately $18.5 million, $14.5 million, and $11.6 million for the years ended December 31, 2021, 2020 and 2019, respectively.

Acquisition, Intangible Assets

Acquisition, Intangible Assets and Goodwill	12 Months Ended
	Dec. 31, 2021
Acquisitions, Intangible Assets And Goodwill [Abstract]
Acquisition, Intangible Assets and Goodwill	Acquisition, Intangible Assets and Goodwill 2021 Acquisitions During the quarter ended December 31, 2021, the Company entered into two Purchase Agreements, both of which were accounted for as business combinations in accordance with ASC 805, Business Combinations. The Company does not consider these acquisitions to be material, individually or in aggregate. The total purchase price was allocated to intangible assets in the amount of $4.3 million and goodwill in the amount of $36.6 million based on the respective estimated fair values. The resulting goodwill from both Agreements is not deductible for income tax purposes. Pro forma results of operations from these acquisitions have not been presented because they were not material to the consolidated results of operations. In April 2021, the Company entered into a Stock Purchase Agreement whereby the Company acquired all of the issued and outstanding shares of a SaaS based security platform company. The consideration was approximately $219.4 million, comprising cash and Class A common stock. The acquisition was accounted for as a business combination in accordance with ASC 805, Business Combinations, and accordingly, the total fair value of the purchase consideration was allocated to the tangible and intangible assets acquired and liabilities assumed based on their estimated fair values on the acquisition date. The total preliminary purchase price allocated to intangible assets and goodwill was $12.0 million and $204.3 million, respectively. The resulting goodwill is not deductible for income tax purposes. Intangible assets consisted of developed technology in the amount of $8.7 million and customer relationships in the amount of $3.3 million. The useful life for developed technology and customer relationships are three The purchase price allocation is preliminary. The Company continues to collect information with regard to its estimates and assumptions, including potential liabilities and contingencies. The Company will record adjustments to the fair value of the assets acquired, liabilities assumed and goodwill within the 12 month measurement period, if necessary. Goodwill resulted primarily from the expectation of enhancing the Company's current application security tools. Pro forma results of operations for this acquisition have not been presented because they were not material to the consolidated results of operations. In February 2021, the Company entered into a Stock Purchase Agreement whereby the Company acquired all of the issued and outstanding shares of an observability data pipeline tool company with the purchase price paid in cash and Class A common stock. The acquisition was accounted for as a business combination in accordance with ASC 805, Business Combinations. The purchase price was allocated to intangible assets in the amount of $1.7 million and goodwill in the amount of $34.3 million based on the respective estimated fair values. Goodwill resulted primarily from the expectation of enhancing the Company's current observability tools. The resulting goodwill is not deductible for income tax purposes. Pro forma results of operations for this acquisition have not been presented because they were not material to the consolidated results of operations. 2020 Acquisition During the year ended December 31, 2020, the Company completed an acquisition with the purchase price in cash and stock. The acquisition was accounted for as a business combination in accordance with ASC 805, Business Combinations . The purchase price was allocated to intangible assets in the amount of $1.5 million and goodwill in the amount of $7.8 million based on the respective estimated fair values. The resulting goodwill is not deductible for income tax purposes. 2019 Acquisition On November 6, 2019, the Company entered into a Stock Purchase Agreement whereby the Company acquired all of the issued and outstanding shares of a target company for $2.2 million in cash consideration. The acquisition was accounted for as a business combination in accordance with ASC 805, Business Combinations . Goodwill resulted primarily from the expectation of integrating and enhancing the Company's current data streaming platform. The preliminary allocation of the purchase price was based on available information and assumptions at the time of the initial valuation and may be subject to change within the measurement period. The results of the operations have been included in the Company’s consolidated statements of operations since the acquisition date and were not material. Pro forma results of operations for this acquisition have not been presented because it was also not material to the consolidated results of operations. Intangible Assets Intangibles, net consisted of the following (in thousands): December 31, 2021 Gross Accumulated Net Amortization Developed technology $ 17,186 $ (4,182) $ 13,004 3 years Customer relationships 3,300 (600) 2,700 4 years Total $ 20,486 $ (4,782) $ 15,704 December 31, 2020 Gross Accumulated Net Amortization Developed technology $ 3,331 $ (1,262) $ 2,069 3 years Intangible amortization expense was approximately $4.4 million, $0.9 million and $0.8 million for the years ended December 31, 2021, 2020 and 2019, respectively. Amortization of developed technology and customer relationships are included in cost of revenue on the Company’s consolidated statement of operations and comprehensive loss. As of December 31, 2021, future amortization expense by year is expected to be as follows (in thousands): Amount 2022 $ 6,507 2023 5,985 2024 2,987 2025 225 Total $ 15,704 Goodwill The changes in the carrying amount of goodwill were as follows (in thousands): Amount Balance as of December 31, 2020 $ 17,609 2021 acquisitions 275,229 Foreign currency translation adjustments (662) Balance as of December 31, 2021 $ 292,176
Acquisition, Intangible Assets and Goodwill	Acquisition, Intangible Assets and Goodwill 2021 Acquisitions During the quarter ended December 31, 2021, the Company entered into two Purchase Agreements, both of which were accounted for as business combinations in accordance with ASC 805, Business Combinations. The Company does not consider these acquisitions to be material, individually or in aggregate. The total purchase price was allocated to intangible assets in the amount of $4.3 million and goodwill in the amount of $36.6 million based on the respective estimated fair values. The resulting goodwill from both Agreements is not deductible for income tax purposes. Pro forma results of operations from these acquisitions have not been presented because they were not material to the consolidated results of operations. In April 2021, the Company entered into a Stock Purchase Agreement whereby the Company acquired all of the issued and outstanding shares of a SaaS based security platform company. The consideration was approximately $219.4 million, comprising cash and Class A common stock. The acquisition was accounted for as a business combination in accordance with ASC 805, Business Combinations, and accordingly, the total fair value of the purchase consideration was allocated to the tangible and intangible assets acquired and liabilities assumed based on their estimated fair values on the acquisition date. The total preliminary purchase price allocated to intangible assets and goodwill was $12.0 million and $204.3 million, respectively. The resulting goodwill is not deductible for income tax purposes. Intangible assets consisted of developed technology in the amount of $8.7 million and customer relationships in the amount of $3.3 million. The useful life for developed technology and customer relationships are three The purchase price allocation is preliminary. The Company continues to collect information with regard to its estimates and assumptions, including potential liabilities and contingencies. The Company will record adjustments to the fair value of the assets acquired, liabilities assumed and goodwill within the 12 month measurement period, if necessary. Goodwill resulted primarily from the expectation of enhancing the Company's current application security tools. Pro forma results of operations for this acquisition have not been presented because they were not material to the consolidated results of operations. In February 2021, the Company entered into a Stock Purchase Agreement whereby the Company acquired all of the issued and outstanding shares of an observability data pipeline tool company with the purchase price paid in cash and Class A common stock. The acquisition was accounted for as a business combination in accordance with ASC 805, Business Combinations. The purchase price was allocated to intangible assets in the amount of $1.7 million and goodwill in the amount of $34.3 million based on the respective estimated fair values. Goodwill resulted primarily from the expectation of enhancing the Company's current observability tools. The resulting goodwill is not deductible for income tax purposes. Pro forma results of operations for this acquisition have not been presented because they were not material to the consolidated results of operations. 2020 Acquisition During the year ended December 31, 2020, the Company completed an acquisition with the purchase price in cash and stock. The acquisition was accounted for as a business combination in accordance with ASC 805, Business Combinations . The purchase price was allocated to intangible assets in the amount of $1.5 million and goodwill in the amount of $7.8 million based on the respective estimated fair values. The resulting goodwill is not deductible for income tax purposes. 2019 Acquisition On November 6, 2019, the Company entered into a Stock Purchase Agreement whereby the Company acquired all of the issued and outstanding shares of a target company for $2.2 million in cash consideration. The acquisition was accounted for as a business combination in accordance with ASC 805, Business Combinations . Goodwill resulted primarily from the expectation of integrating and enhancing the Company's current data streaming platform. The preliminary allocation of the purchase price was based on available information and assumptions at the time of the initial valuation and may be subject to change within the measurement period. The results of the operations have been included in the Company’s consolidated statements of operations since the acquisition date and were not material. Pro forma results of operations for this acquisition have not been presented because it was also not material to the consolidated results of operations. Intangible Assets Intangibles, net consisted of the following (in thousands): December 31, 2021 Gross Accumulated Net Amortization Developed technology $ 17,186 $ (4,182) $ 13,004 3 years Customer relationships 3,300 (600) 2,700 4 years Total $ 20,486 $ (4,782) $ 15,704 December 31, 2020 Gross Accumulated Net Amortization Developed technology $ 3,331 $ (1,262) $ 2,069 3 years Intangible amortization expense was approximately $4.4 million, $0.9 million and $0.8 million for the years ended December 31, 2021, 2020 and 2019, respectively. Amortization of developed technology and customer relationships are included in cost of revenue on the Company’s consolidated statement of operations and comprehensive loss. As of December 31, 2021, future amortization expense by year is expected to be as follows (in thousands): Amount 2022 $ 6,507 2023 5,985 2024 2,987 2025 225 Total $ 15,704 Goodwill The changes in the carrying amount of goodwill were as follows (in thousands): Amount Balance as of December 31, 2020 $ 17,609 2021 acquisitions 275,229 Foreign currency translation adjustments (662) Balance as of December 31, 2021 $ 292,176

Accrued Expenses and Other Curr

Accrued Expenses and Other Current Liabilities	12 Months Ended
	Dec. 31, 2021
Payables and Accruals [Abstract]
Accrued Expenses and Other Current Liabilities	Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consisted of the following (in thousands): December 31, December 31, Accrued expenses $ 50,885 $ 20,008 Accrued compensation and commissions 43,050 22,186 Other tax liability and sales tax 17,316 12,558 Early exercise liability-stock options 33 599 Total accrued expenses and other current liabilities $ 111,284 $ 55,351

Convertible Senior Notes

Convertible Senior Notes	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Convertible Senior Notes	Convertible Senior Notes On June 2, 2020, the Company issued $747.5 million aggregate principal amount of 0.125% convertible senior notes due 2025 (the “2025 Notes”) in a private placement to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (“Securities Act”). The total net proceeds from the sale of the 2025 Notes, after deducting the initial purchasers’ discounts and debt issuance costs, were approximately $730.2 million. The 2025 Notes bear interest at a rate of 0.125% per year, payable semiannually in arrears on June 15 and December 15 of each year, beginning on December 15, 2020. The 2025 Notes will mature on June 15, 2025, unless earlier converted, redeemed or repurchased. Holders may convert their notes at their option at any time prior to the close of business on the business day immediately preceding March 15, 2025 only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on September 30, 2020 (and only during such calendar quarter), if the last reported sale price of the Company’s Class A common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any ten consecutive trading day period (the “measurement period”) in which the trading price per $1,000 principal amount of 2025 Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company’s Class A common stock and the conversion rate on each such trading day; (3) if the Company calls such 2025 Notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events, as set forth in the indenture governing the 2025 Notes (“the Indenture”). On or after March 15, 2025 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their notes, in integral multiples of $1,000 principal amount, at the option of the holder regardless of the foregoing circumstances. The conversion rate for the 2025 Notes is initially 10.8338 shares of Class A common stock per $1,000 principal amount of notes (equivalent to an initial conversion price of approximately $92.30 per share of Class A common stock), subject to adjustment as set forth in the Indenture. Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of Class A common stock or a combination of cash and shares of Class A common stock, at the Company’s election. If the Company satisfies its conversion obligation solely in cash or through payment and delivery, as the case may be, of a combination of cash and shares of Class A common stock, the amount of cash and shares of Class A common stock, if any, due upon conversion will be based on a daily conversion value calculated on a proportionate basis for each trading day in a 30 trading day observation period as described in the Indenture. In addition, if specific corporate events occur prior to the applicable maturity date, or if the Company elects to redeem the 2025 Notes, the Company will increase the conversion rate for a holder who elects to convert their notes in connection with such a corporate event or redemption in certain circumstances. It is the Company’s current intent to settle the principal amount of the 2025 Notes in cash. During the three months ended September 30 and December 31, 2021, the conditional conversion feature of the 2025 Notes was triggered as the last reported sale price of the Company’s Class A common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the quarters ended September 30 and December 31, 2021 was greater than or equal to 130% of the conversion price on each applicable trading day. Therefore the 2025 Notes are convertible, in whole or in part, at the option of the holders between January 1, 2022 through March 31, 2022. Whether the 2025 Notes will be convertible following such period will depend on the continued satisfaction of this condition or another conversion condition in the future. When a conversion notice is received, the Company has the option to pay or deliver cash, shares of the Company’s common stock, or a combination thereof. As of December 31, 2021, the Company has received an immaterial amount of conversion notices from the holders and the 2025 Notes were classified as long-term debt on the Company's consolidated balance sheet. The Company may not redeem the 2025 Notes prior to June 20, 2023. On or after June 20, 2023, and prior to the 31st scheduled trading day immediately preceding the maturity date, the Company may redeem for cash all or any portion of the 2025 Notes, at its option, if the last reported sale price of its Class A common stock was at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending on, and including, the trading day immediately preceding the date on which the Company provides a notice of redemption at a redemption price equal to 100% of the principal amount of the 2025 Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. In accounting for the issuance of the 2025 Notes, the 2025 Notes were separated into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of similar liabilities that do not have associated convertible features. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the par value of the respective 2025 Notes. This difference represents the debt discount that is amortized to interest expense over the contractual terms of the 2025 Notes using the effective interest rate method. The carrying amount of the equity component representing the conversion option was $177.2 million. The equity component was recorded in additional paid-in capital and is not remeasured as long as it continues to meet the conditions for equity classification. In accounting for the debt issuance costs of $17.3 million related to the 2025 Notes, the Company allocated the total amount incurred to the liability and equity components of the 2025 Notes in the same proportion as the allocation of the proceeds. Issuance costs attributable to the liability component were $13.2 million and will be amortized, along with the debt discount, to interest expense over the contractual term of the 2025 Notes at an effective interest rate of 5.97%. Issuance costs attributable to the equity component were $4.1 million and are netted against the equity component in additional paid-in capital. On January 1, 2021 the Company adopted ASU No. 2020-06. As a result of the adoption, the debt conversion option of $177.2 million and debt issuance costs of $4.1 million previously attributable to the equity component are no longer presented in equity. Similarly, the debt discount, that is equal to the carrying value of the embedded conversion feature upon issuance, is no longer amortized into income as interest expense over the life of the instrument. This resulted in a $16.8 million decrease to the opening balance of accumulated deficit, a $173.1 million decrease to the opening balance of additional paid-in capital and a $156.3 million increase to the opening balance of convertible senior notes, net on the consolidated balance sheet. The net carrying amount of the liability component of the 2025 Notes was as follows (in thousands): December 31, December 31, Convertible senior notes, net: Principal $ 747,500 $ 747,500 Unamortized debt discount (1) — (159,547) Unamortized debt issuance costs (1) (12,018) (12,089) Net carrying amount $ 735,482 $ 575,864 Equity component (1) $ — $ 173,070 _____________________ 1) As noted above, December 31, 2020 amounts have not been adjusted due to the adoption of ASU 2020-06 under the modified retrospective method. As of December 31, 2021, the total estimated fair value of the 2025 Notes was approximately $1,511.5 million. The fair value was determined based on the closing trading price per $100 of the 2025 Notes as of the last day of trading for the period. The fair value of the 2025 Notes is 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 2025 Notes for years ended December 31, 2021 (in thousands): Year Ended December 31, 2021 2020 Contractual interest expense $ 934 $ 540 Amortization of debt discount — 17,621 Amortization of issuance costs 3,349 1,106 Total $ 4,283 $ 19,267 Capped Calls In connection with the pricing of the 2025 Notes, the Company entered into privately negotiated capped call transactions with certain counterparties (“Capped Calls”). The Capped Calls each have an initial strike price of approximately $92.30 per share, subject to certain adjustments, which corresponds to the initial conversion price of the 2025 Notes. The Capped Calls have initial cap prices of $151.04 per share, subject to certain adjustments. The Capped Calls are expected to partially offset the potential dilution to the Company’s Class A common stock upon any conversion of the 2025 Notes, with such offset subject to a cap based on the cap price. The Capped Calls cover, subject to anti-dilution adjustments, approximately 8.1 million shares of the Company’s Class A common stock. For accounting purposes, the Capped Calls are separate transactions, and not part of the 2025 Notes. As these transactions meet certain accounting criteria, the Capped Calls are recorded in stockholders' equity and are not accounted for as derivatives. The cost of $89.6 million incurred to purchase the Capped Calls was recorded as a reduction to additional paid-in capital and will not be remeasured.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The Company enters into non-cancelable purchase commitments and operating leases in the normal course of business. Non-cancelable purchase commitments for business operations and operating lease obligations total $688.4 million and $97.0 million, respectively, as of December 31, 2021, due primarily over the next five years. Purchase commitments for business operations are primarily related to cloud hosting and other software-based services. The Company also issued long-term debt to finance the business. In June 2020, the Company issued $747.5 million aggregate principal amount of the 2025 Notes in a private placement to qualified institutional buyers pursuant to Rule 144A under the Securities Act. The total net proceeds from the sale of the 2025 Notes, after deducting the initial purchasers’ discounts and debt issuance costs, were approximately $730.2 million. The principal and future interest payments related to the 2025 Notes is $750.8 million. Non-Income Tax Matters — In January 2015, the Company recorded a $5.0 million contingent Federal payroll tax liability in conjunction with common stock repurchase transactions, as part of a capital raise, with certain of its employees. The potential payroll tax treatment of these transactions was subject to uncertainty, and the contingent payroll tax liability was deemed probable and reasonably estimable. On April 15, 2019, the period of limitations for assessing the contingent Federal payroll tax liability expired and the Company was legally released from being the primary obligor. As a result, the Company recognized a $5.0 million benefit in the operating expenses section of the consolidated statement of operations during the year ended December 31, 2019. In January 2016, the Company recorded a $5.4 million contingent Federal payroll tax liability in conjunction with common stock repurchase transactions, as part of a capital raise, with certain of its employees. The potential payroll tax treatment of these transactions was subject to uncertainty, and the contingent payroll tax liability was deemed probable and reasonably estimable. On April 15, 2020, the period of limitations for assessing the contingent Federal payroll tax liability expired and the Company was legally released from being the primary obligor. As a result, the Company recognized a $5.6 million benefit in the operating expenses section of the consolidated statement of operations during the year ended December 31, 2020. 401(k) Plan —The Company sponsors a 401(k) defined contribution plan covering all eligible US employees. Contributions to the 401(k) plan are discretionary. The Company did not make any matching contributions to the 401(k) plan for the years ended December 31, 2021 and 2020. Legal Matters —The Company is involved from time to time in various claims and legal actions arising in the ordinary course of business. While it is not feasible to predict or determine the ultimate outcome of these matters, the Company believes that none of its current legal proceedings will have a material adverse effect on its financial position or results of operations. Indemnification —The Company enters into indemnification provisions under some agreements with other parties in the ordinary course of business, including business partners, investors, contractors, customers, and the Company’s officers, directors and certain employees. The Company has agreed to indemnify and defend the indemnified party claims and related losses suffered or incurred by the indemnified party from actual or threatened third-party claim because of the Company’s activities or non-compliance with certain representations and warranties made by the Company. It is not possible to determine the maximum potential loss under these indemnification provisions due to the Company’s limited history of prior indemnification claims and the unique facts and circumstances involved in each particular provision. To date, losses recorded in the Company’s consolidated statements of operations in connection with the indemnification provisions have not been material.

Leases

Leases	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Leases	Leases The Company has entered into various non-cancelable operating leases for its facilities expiring between fiscal 2022 and 2030. Certain lease agreements contain an option for the Company to renew a lease for a term of up to two years or an option to terminate a lease early within three years. The Company considers these options, which may be elected at the Company’s sole discretion, in determining the lease term on a lease-by-lease basis. Lease expense for these leases is recognized on a straight-line basis over the lease term, with variable lease payments recognized in the period those payments are incurred. Rent expense for the years ended December 31, 2021, 2020 and 2019 was $23.8 million, $20.8 million, and $16.7 million, respectively. During the years ended 2021, 2020 and 2019, the Company recorded $1.0 million, $1.0 million and $1.0 million, respectively, in sub-lease income which were recorded as a credit to rent expense. The components of lease cost recognized within the Company’s consolidated statements of operations were as follows (in thousands): Year Ended December 31, 2021 Year Ended December 31, 2020 Operating lease cost (1) $ 20,198 $ 17,081 Short-term lease cost 3,609 3,717 _____________________ 1) Includes non-cash lease expense of $17.2 million and $14.0 million for the years ended December 31, 2021 and 2020, respectively. Supplemental cash flow information and non-cash activity related to the Company’s operating leases are as follows (in thousands): Year Ended December 31, 2021 Year Ended December 31, 2020 Cash paid for amounts included in measurement of lease liabilities $ 20,741 $ 15,074 Operating lease assets obtained in exchange for new lease liabilities 17,476 17,379 Maturities of lease liabilities by fiscal year for the Company’s operating leases are as follows (in thousands): Amount 2022 $ 22,907 2023 19,127 2024 9,591 2025 7,633 2026 6,109 Thereafter 15,528 Total lease payments $ 80,895 Less: imputed interest (8,633) Present value of lease liabilities $ 72,262 As of December 31, 2021, the Company has four additional operating leases that have not yet commenced, which are excluded from the table above. The operating leases will commence in fiscal year 2022 and total $16.1 million of undiscounted future payments with a weighted average lease term of 5.3 years. Weighted average remaining lease term and discount rate for the Company’s operating leases are as follows: December 31, December 31, Weighted average remaining lease term (years) 4.9 4.4 Weighted average discount rate 4.55 % 4.71 %

Revenue

Revenue	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue	Revenue Geographical Information Revenue by location is determined by the billing address of the customer. The following table sets forth revenue by geographic area (in thousands): Year Ended December 31, 2021 2020 2019 North America $ 736,218 $ 449,899 $ 272,190 International 292,566 153,567 90,590 Total $ 1,028,784 $ 603,466 $ 362,780 Other than the United States, no other individual country accounted for 10% or more of total revenue for the years ended December 31, 2021, 2020, or 2019. Accounts Receivable As of December 31, 2021, and 2020, unbilled accounts receivable of approximately $44.2 million and $20.1 million, respectively, was included in accounts receivable on the Company’s consolidated balance sheets. During the years ended December 31, 2021 and 2020, the Company charged $1.7 million and $1.6 million, respectively, of accounts receivable deemed uncollectible against the allowance for credit losses. Deferred Revenue and Remaining Performance Obligations Revenue recognized during the years ended December 31, 2021, 2020 and 2019 which was included in the deferred revenue balances at the beginning of each respective period, was $206.6 million, $126.8 million, and $71.0 million. As of December 31, 2021, and 2020, the aggregate transaction price allocated to remaining performance obligations was $815.0 million and $434.1 million, respectively. There is uncertainty in the timing of revenues associated with the Company’s drawdown contracts, as future revenue can often vary significantly from past revenue. However, the Company expects to recognize substantially all of the remaining performance obligations over the next 24 months. Deferred Contract Costs Deferred contract costs on the Company’s consolidated balance sheets were $65.3 million and $40.4 million as of December 31, 2021 and 2020, respectively. Amortization expense was $17.9 million, $10.4 million and $5.4 million for the years ended December 31, 2021, 2020 and 2019, respectively.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity Class A and Class B Common Stock The Company has two classes of common stock, Class A and Class B. The rights of the holders of Class A and Class B common stock are identical, except with respect to voting and conversion. Each share of Class A common stock is entitled to one vote per share and each share of Class B common stock is entitled to ten votes per share. Shares of Class B common stock may be converted into Class A common stock at any time at the option of the stockholder and are automatically converted upon the sale or transfer to Class A common stock, subject to certain limited exceptions. During the year ended December 31, 2021, 38,379,141 shares of Class B common stock were converted into Class A common stock. As of December 31, 2021, the Company had authorized 2,000,000,000 shares of Class A common stock and 310,000,000 shares of Class B common stock, each at a par value per share of $0.00001, of which 263,339,585 shares of Class A common stock and 50,025,852 shares of Class B common stock were issued and outstanding. As of December 31, 2021 and 2020, the Company had reserved shares of common stock for future issuance as follows: December 31, 2021 2020 Options and RSU's outstanding 29,453,830 32,235,043 Shares available for future option and RSU grants 54,279,321 42,797,432 Shares subject to the employee stock purchase plan 11,989,812 9,222,883 95,722,963 84,255,358 Equity Incentive Plans The Company has two equity incentive plans, the 2012 Equity Incentive Plan (the “2012 Plan”) and the 2019 Equity Incentive Plan (the “2019 Plan”). In connection with the IPO, the Company ceased granting awards under the 2012 Plan, and all shares that remained available for issuance under the 2012 Plan at that time were transferred to the 2019 Plan . Additionally, as of December 31, 2021, there were 21,340,890 shares of Class A common stock issuable upon conversion of Class B common stock underlying options outstanding under the 2012 Plan. Under the 2019 Plan , the Board and any other committee or subcommittee of the Board may grant stock options, stock appreciation rights, restricted stock awards, restricted stock units (“RSUs”), and performance-based and other awards, each equity award valued or based on the Company’s Class A common stock, to employees, directors, consultants, and advisors of the Company. As of December 31, 2021, there were 54,279,321 shares available for grant under the 2019 Plan. Stock Options The Company uses the Black-Scholes option pricing model to value stock options. The fair value of each award is recognized on a straight-line basis over the vesting or service period, which is typically four years. The Black-Scholes model requires specified inputs to determine the fair value of stock-based awards, consisting of (i) the expected volatility of the Company’s common stock over the expected option life, (ii) the risk-free interest rate, (iii) the expected dividend yield, and (iv) the expected option life. The following table summarizes the assumptions used during the years ended December 31, 2021, 2020 and 2019: Year Ended December 31, 2021 (1) 2020 2019 Expected volatility n/a 38.9% 38.9% - 39.5% Risk-free interest rate n/a 1.7% 1.4% - 2.6% Expected dividend yield n/a —% —% Expected term (in years) n/a 6.1 5.2 - 6.3 Fair value of common stock n/a $41.19 $6.16 - $38.21 _____________________ 1) There were no stock options granted during the year ended December 31, 2021. Expected volatility —The Company performed an analysis of its peer companies with similar expected lives to develop an expected volatility assumption. Expected term —Derived from the life of the options granted under the option plan and is based on the simplified method which is essentially the weighted average of the vesting period and contractual term. Risk-free interest rate —Based upon quoted market yields for the United States Treasury debt securities. Expected dividend yield —Since the Company has never paid and has no intention to pay cash dividends on common stock, the expected dividend yield is zero. Fair value of the common stock —Prior to the IPO, the fair value of common stock underlying the stock-based awards was determined by the Company’s Board of Directors. The Board of Directors considered numerous objective and subjective factors to determine the fair value of the Company’s common stock at each meeting in which awards were approved. The factors considered included, but were not limited to: (i) the results of contemporaneous independent third-party valuations of the Company’s common stock; (ii) the prices, rights, preferences, and privileges of the Company’s redeemable convertible Preferred Stock relative to those of its common stock; (iii) the lack of marketability of the Company’s common stock; (iv) actual operating and financial results; (v) current business conditions and projections; (vi) the likelihood of achieving a liquidity event, such as an initial public offering or sale of the Company, given prevailing market conditions; and (vii) precedent transactions involving the Company’s shares. Since the Company’s IPO, the fair value of the underlying common stock is determined by the closing price, on the date of grant, of the Company’s Class A common stock, which is traded publicly on The Nasdaq Global Select Market. The following table summarizes the Company's stock option activity and weighted-average exercise prices: Number of Weighted- Weighted- Aggregate Balance—December 31, 2019 36,384,767 $ 2.96 7.6 $ 1,266,938 Options granted 14,600 41.19 Options exercised (8,753,274) 1.83 Options forfeited or expired (577,770) 4.93 Balance—December 31, 2020 27,068,323 $ 3.31 6.7 $ 2,575,069 Exercisable—December 31, 2020 16,545,562 $ 1.39 5.9 $ 1,605,723 Balance—December 31, 2020 27,068,323 $ 3.31 6.7 $ 2,575,069 Options granted — — Options exercised (5,109,688) 2.92 Options forfeited or expired (586,074) 6.40 Balance—December 31, 2021 21,372,561 $ 3.31 5.5 $ 3,735,819 Exercisable—December 31, 2021 16,682,455 $ 2.07 5.0 $ 2,936,715 As of December 31, 2021, there were 31,671 shares of Class A common stock and 21,340,890 shares of Class B common stock issuable upon the exercise of options outstanding. As of December 31, 2020, there were 34,759 shares of Class A common stock and 27,033,564 shares of Class B common stock issuable upon the exercise of options outstanding. Total compensation cost related to unvested awards not yet recognized was approximately $31.6 million and $60.6 million as of December 31, 2021 and December 31, 2020, respectively. The weighted-average period over which this compensation cost related to unvested employee awards will be recognized is 1.3 years and 2.0 years as of December 31, 2021 and December 31, 2020, respectively. There were no options granted during the year ended December 31, 2021. The weighted average grant-date fair value of options granted during the years ended December 31, 2020 and 2019 was $16.55 and $8.69, respectively. The Company received approximately $14.9 million, $16.0 million and $7.9 million in cash proceeds from options exercised during the years ended December 31, 2021, 2020 and 2019, respectively. The intrinsic value of options exercised in during the years ended December 31, 2021, 2020 and 2019 was approximately $579.6 million, $554.3 million and $121.3 million, respectively. The aggregate fair value of options vested during the years ended December 31, 2021, 2020 and 2019 was $28.1 million, $27.6 million and $10.8 million, respectively. Common stock purchased pursuant to an early exercise of stock options is not deemed to be outstanding for accounting purposes until those shares vest. The consideration received for an exercise of an option is considered to be a deposit of the exercise price and the related dollar amount is recorded as a liability. The shares issued upon the early exercise of these unvested stock option awards, which are reflected as exercises in the table above, are considered to be legally issued and outstanding on the date of exercise. Upon termination of service, the Company may repurchase unvested shares acquired through early exercise of stock options at a price equal to the price per share paid upon the exercise of such options. The Company has recorded liabilities related to early exercises of options for 31,500 shares and 438,750 shares of Class B common stock as of December 31, 2021 and 2020, respectively.` Restricted Stock Units The following table summarizes the activity for the Company’s unvested RSUs: Shares Weighted-Average Aggregate Unvested and outstanding balance as of December 31, 2020 5,166,720 $ 59.50 $ 508,612 Awarded 5,208,252 124.47 Vested (1,483,639) 54.89 Forfeited/canceled (810,064) 69.53 Unvested and outstanding balance as of December 31, 2021 8,081,269 $ 101.21 $ 1,439,355 The Company granted 244,445, 96,210, 117,538, 245,761, and 98,593 restricted shares of Class A common stock in November 2019, June 2020, February 2021, April 2021, and December 2021, respectively, in connection with acquisitions which are subject to service-based vesting conditions over approximately four years. Total compensation cost related to unvested RSUs and restricted shares of common stock not yet recognized was approximately $773.6 million and $281.5 million as of December 31, 2021 and December 31, 2020, respectively. The weighted-average period over which this compensation cost related to unvested RSUs and restricted shares will be recognized is 3.1 years and 3.4 years as of December 31, 2021 and December 31, 2020, respectively. Stock-Based Compensation Stock-based compensation expense was included in the consolidated statement of operations as follows (in thousands): Year Ended December 31, 2021 2020 2019 Cost of revenue $ 4,565 $ 1,794 $ 582 Research and development 101,942 38,008 7,972 Sales and marketing 35,035 20,467 5,538 General and administrative 22,195 14,105 4,942 Stock-based compensation, net of amounts capitalized 163,737 74,374 19,034 Capitalized stock-based compensation expense 9,660 3,404 201 Total stock-based compensation expense $ 173,397 $ 77,778 $ 19,235 Employee Stock Purchase Plan In September 2019, the Board adopted and approved the 2019 ESPP, which became effective on the date of the final prospectus for the Company’s IPO. The ESPP is implemented through a series of offerings under which eligible employees are granted purchase rights to purchase shares of the Company’s Class A common stock on specified dates during such offerings. Under the ESPP, the Company may specify offerings with durations of not more than 27 months and may specify shorter purchase periods within each offering. On each purchase date, eligible employees will purchase the shares at a price per share equal to 85% of the lesser of (1)the fair market value of the Company’s Class A common stock on the first trading day of the offering period, or (2)the fair market value of the Company’s Class A common stock on the purchase date, as defined in the ESPP. The Company recognized $7.6 million, $5.0 million, and $1.2 million of stock-based compensation expense related to the ESPP during the years ended December 31, 2021, 2020, and 2019, respectively. As of December 31, 2021, and 2020, $4.2 million and $2.8 million, respectively has been withheld on behalf of employees for a future purchase under the ESPP due to the timing of payroll deductions. During the years ended December 31, 2021 and 2020 the Company issued 291,871 and 447,955 shares of Class A common stock under the ESPP. As of December 31, 2021, 11,989,812 shares of Class A common stock remain available for grant under the ESPP.

Interest Income and Other Incom

Interest Income and Other Income, Net	12 Months Ended
	Dec. 31, 2021
Interest and Other Income [Abstract]
Interest Income and Other Income, Net	Interest Income and Other Income, Net Interest income and other income, net consist of the following (in thousands): For the Year Ended December 31, 2021 2020 2019 Interest income $ 21,412 $ 21,234 $ 4,110 Other income, net 374 751 86 Interest income and other income, net $ 21,786 $ 21,985 $ 4,196

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income Taxes — For financial reporting purposes, loss before income taxes, includes the following components (in thousands): December 31, 2021 2020 2019 Domestic $ (29,617) $ (32,033) $ (18,330) Foreign 11,195 9,811 2,354 Loss before income taxes $ (18,422) $ (22,222) $ (15,976) Total income taxes allocated to operations for the years ended December 31, 2021, 2020 and 2019 were as follows (in thousands): 2021 Current Deferred Total Federal $ 232 $ — $ 232 State 44 — 44 Foreign 2,091 (44) 2,047 Total $ 2,367 $ (44) $ 2,323 2020 Current Deferred Total Federal $ — $ — $ — State 124 — 124 Foreign 2,239 (38) 2,201 Total $ 2,363 $ (38) $ 2,325 2019 Current Deferred Total Federal $ — $ — $ — State 126 — 126 Foreign 967 (359) 608 Total $ 1,093 $ (359) $ 734 Tax Rate Reconciliation —Income tax expense was $2.3 million, $2.3 million and $0.7 million for the years ended December 31, 2021, 2020 and 2019, respectively, and differed from the amounts computed by applying the U.S. federal statutory income tax rate of 21% for the years ended December 31, 2021, 2020 and 2019, to pretax loss from operations as a result of the following (in thousands): December 31, 2021 2020 2019 Income tax expense at federal statutory rate $ (3,868) $ (4,667) $ (3,355) Nondeductible expenses 368 132 380 State taxes (net of federal benefit) 18 98 100 Net change in valuation allowance 62,173 51,892 5,043 Uncertain tax positions (728) 17 23 US tax costs on international operations 1,478 1,818 201 Foreign taxes 424 126 92 Share based compensation deductions (57,350) (47,032) (1,630) Return to provision (193) (48) (120) Other 1 (11) — Total $ 2,323 $ 2,325 $ 734 For the year ended December 31, 2021, the Company has evaluated the available evidence supporting the realization of its deferred tax assets, including the amount and timing of future taxable income, and has determined that it is more likely than not that its net deferred tax assets will not be realized in the United States. Due to uncertainties surrounding the realization of the deferred tax assets, the Company recorded a full valuation allowance against substantially all of its net deferred tax assets. When the Company determines that it will be able to realize some portion or all of its deferred tax assets, an adjustment to its valuation allowance on its deferred tax assets would have the effect of increasing net income in the period such determination is made. The Company is subject to tax laws in the United States and numerous foreign jurisdictions. The United States and many international legislative and regulatory bodies continually propose and enact legislation that could significantly impact how U.S. multinational corporations are taxed. The Company is closely monitoring proposed legislation and its potential impact. Additionally, beginning in 2022, the Tax Cuts and Jobs Act (the “Tax Act”) of 2017 eliminates the option to deduct research and development expenditures in the year incurred and requires taxpayers to amortize such expenditures over five years. The Company is assessing the potential impact if these provisions are not deferred, modified, or repealed by Congress with retroactive effect to January 1, 2022. Components of Deferred Taxes —The tax effects of temporary differences that give rise to the deferred tax assets and deferred tax liabilities at December 31, 2021 and 2020 are presented below (in thousands): December 31, 2021 2020 Deferred tax assets: Net operating losses $ 128,263 $ 66,801 Stock-based compensation 23,669 11,820 Accrued bonus 2,438 536 Internal use software 2,220 2,153 Lease liability 14,374 12,566 Convertible senior notes - issuance costs — 832 Fixed assets 1,654 982 Other 5,517 1,114 Total deferred tax assets $ 178,135 $ 96,804 Less: valuation allowance (148,648) (33,847) Deferred tax assets, net of valuation allowance $ 29,487 $ 62,957 Deferred tax liabilities: Commissions (16,590) (10,247) Right of use asset (12,815) (11,394) Convertible senior notes — (40,478) Other — (800) Total deferred tax liabilities $ (29,405) $ (62,919) Deferred tax assets, net $ 82 $ 38 The Company accounts for income taxes using an asset and liability method and deferred income tax assets and liabilities are measured using the currently enacted tax rates that apply to taxable income in effect for the years in which those tax assets and liabilities are expected to be realized or settled. The Company’s deferred tax assets and liabilities are comprised primarily of federal and state net operating loss carryforwards and basis differences for financial reporting and tax purposes of certain assets and liabilities. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Based upon the weight of all available evidence, which includes the historical operating performance and the recorded cumulative losses in prior fiscal periods, management does not believe as of December 31, 2021 and 2020 that it is more likely than not that the Company will realize its U.S. deferred tax assets. As a result, a valuation allowance of $148.6 million and $33.8 million has been provided at December 31, 2021 and 2020, respectively. The valuation allowance changed by $114.8 million and $18.6 million at December 31, 2021 and 2020, respectively. At December 31, 2021 and 2020, the Company has net operating loss carryforwards for federal tax purposes of approximately $505.4 million and $263.2 million, respectively, which is available to offset federal taxable income. The federal net operating loss carryforwards generated at December 31, 2017 and prior will begin to expire in 2031, if not utilized. Net operating losses generated after December 31, 2017 have an indefinite carryforward period but are subject to an 80% of taxable income limitation after December 31, 2020. The Company has approximately $342.1 million and $177.5 million of post-apportioned net operating loss carryforwards as of December 31, 2021 and 2020, respectively for various state tax purposes. The state net operating loss carryforwards will begin to expire in 2028, if not utilized. Generally, the utilization of net operating losses may be subject to an annual limitation provided for in the Internal Revenue Code of 1986, as amended, under Section 382 and similar state codes. The Company has prepared an analysis to determine whether its net operating losses may be limited under such provisions. It has been determined that any annual limitation would not result in the expiration of net operating loss carryforwards before utilization. In general, it is the practice and intention of the Company to reinvest the earnings of its non-U.S. subsidiaries in those operations. Historically, the Company has not made a provision for U.S. income tax with respect to accumulated earnings of foreign subsidiaries where the foreign investment of such earnings is essentially permanent in duration. Generally, such amounts would become subject to U.S. taxation upon the remittance of dividends and under certain other circumstances. The Company has not provided U.S. taxes on unremitted earnings of its foreign subsidiaries as it asserts permanent reinvestment on any accumulated earnings and profits. Consistent with the provisions of ASC 740, Income Taxes , the Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The following table shows the changes in the gross amount of unrecognized tax benefits as of December 31, 2021 , 2020 and 2019 (in thousands): December 31, 2021 2020 2019 Beginning balance $ 532 $ 920 $ 920 Increases based on tax positions during the current period — — (Decreases) based on tax positions during the current period (426) (388) — Ending balance $ 106 $ 532 $ 920 The total amount of unrecognized tax benefits that, if recognized would impact the effective tax rate would be $0.1 million for the years ended December 31, 2021. The Company’s policy for classifying interest and penalties associated with unrecognized income tax benefits is to include such items in income tax expense. The total amount of interest and penalties associated with unrecognized income tax benefits is $0.1 million and $0.4 million for the years ended December 31, 2021 and 2020. It is reasonably possible that certain unrecognized tax benefits may increase or decrease within the next 12 months due to tax examination changes, settlement activities, expirations of statute of limitations, or the impact on recognition and measurement considerations related to the results of published tax cases or other similar activities. As such the Company anticipates insignificant changes to unrecognized tax benefits over the next 12 months. The Company files income tax returns in the U.S. federal jurisdiction, various state jurisdictions and in various international jurisdictions. Tax years 2016 and forward generally remain open for examination for federal and state tax purposes. To the extent utilized in future years’ tax returns, net operating loss carryforwards at December 31, 2021 and 2020 will remain subject to examination until the respective tax year is closed.

Net Loss Per Share

Net Loss Per Share	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share Basic and diluted net loss per common share is presented in conformity with the two-class method required for participating securities. Immediately prior to the consummation of the Company’s IPO in September 2019, all outstanding shares of convertible preferred stock and common stock were converted into shares of Class B common stock. As a result, Class A and Class B common stock are the only outstanding equity in the Company. Basic and diluted net loss per share is computed using the weighted-average number of common shares of common stock outstanding during the period. The undistributed earnings are allocated based on the contractual participation rights of the Class A and Class B common shares stock as if the earnings for the year have been distributed. As the liquidation and dividend rights are identical, the undistributed earnings are allocated on a proportionate basis. Further, as the conversion of Class B common stock is assumed in the computation of the diluted net loss per share of Class A common stock, the undistributed earnings are equal to net loss for that computation. The following table presents the calculation of basic and diluted net loss per share (in thousands, except per share data): Year Ended December 31, 2021 2020 2019 Basic net loss per share: Class A Class B Class A Class B Class A Class B Numerator: Net loss $ (16,177) $ (4,568) $ (13,614) $ (10,933) $ (1,149) $ (15,561) Denominator: Weighted average shares used in calculating net loss per share, basic 240,999 68,049 166,582 133,768 9,611 130,262 Basic net loss per share $ (0.07) $ (0.07) $ (0.08) $ (0.08) $ (0.12) $ (0.12) Diluted net loss per share: Numerator: Allocation of distributed loss for basic computation $ (16,177) $ (4,568) $ (13,614) $ (10,933) $ (1,149) $ (15,561) Reallocation of undistributed loss as a result of conversion of Class B to Class A shares (4,568) (10,933) — (15,561) — Allocation of undistributed loss $ (20,745) $ (4,568) $ (24,547) $ (10,933) $ (16,710) $ (15,561) Denominator: Number of shares used in basic calculation 240,999 68,049 166,582 133,768 9,611 130,262 Weighted average effect of diluted securities: Conversion of Class B to Class A common shares outstanding 68,049 133,768 — 130,262 — Number of shares used in diluted calculation 309,048 68,049 300,350 133,768 139,873 130,262 Diluted net loss per share $ (0.07) $ (0.07) $ (0.08) $ (0.08) $ (0.12) $ (0.12) Since the Company was in a loss position for the periods presented, basic net loss per share is the same as diluted net loss per share as the inclusion of all potential common shares outstanding would have been anti-dilutive. Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows (in thousands): Year Ended December 31, 2021 2020 2019 Shares subject to outstanding stock options and RSUs 29,454 32,235 37,032 Unvested early exercised stock options and restricted shares of common stock 946 718 1,240 Shares subject to the employee stock purchase plan 94 141 353 Shares issuable upon conversion of the convertible senior notes 8,098 608 — Total 38,592 33,702 38,625 ASU No. 2020-06 requires the application of the if-converted method to calculate the impact of convertible instruments on diluted earnings per share when the instruments may be settled in cash or shares. See Note 2, Basis of Presentation and Summary of Significant Accounting Policies—Accounting Policies Recently Adopted for more information. During the three months ended September 30 and December 31, 2021, the conditional conversion feature of the 2025 Notes was triggered and the 2025 Notes are convertible, in whole or in part, at the option of the holders between January 1, 2022 through March 31, 2022. The Company uses the if-converted method for calculating any potential dilutive effect of the conversion options embedded in the 2025 Notes on diluted net income per share; however, since the Company is in a net loss position, there was no dilutive effect during any period presented. The Company entered into Capped Calls in connection with the issuance of the 2025 Notes. The effect of the Capped Calls was also excluded from the calculation of diluted net income per share as the effect of the Capped Calls would have been

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”).
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of Datadog, Inc. and its wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation.
Stock Split and Authorized Shares	Stock Split and Authorized Shares On September 6, 2019, the Board and stockholders approved an amended and restated certificate of incorporation of the Company effecting a 3-for-1 stock split of the Company’s issued and outstanding shares of common stock and convertible preferred stock, and an increase to the authorized shares of the Company’s common stock and convertible preferred stock to 380,000,000 shares and 179,814,912 shares, respectively. The split was effected on September 6, 2019 and without any change in the par value per share. All information related to the Company’s common stock, convertible preferred stock and stock awards has been retroactively adjusted to give effect to 3-for-1 stock split on September 6, 2019. On September 23, 2019, an amended and restated certificate of incorporation of the Company was filed immediately prior to the closing of the IPO authorizing an aggregate of 2,330,000,000 shares of capital stock of the Company, including 2,000,000,000 shares of Class A common stock, 310,000,000 shares of Class B common stock and 20,000,000 shares of preferred stock.
Segment Information	Segment Information The Company has a single operating and reportable segment as well as one business activity, monitoring and providing analytics on companies’ information technology (“IT”) infrastructure. The Company’s chief operating decision maker is its Chief Executive Officer, who reviews financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance, and allocating resources. There are no segment managers who are held accountable for operations or results below the consolidated level.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Such estimates include the fair value of marketable securities, the allowance for credit losses , the fair value of acquired assets and assumed liabilities from business combinations, useful lives of property, equipment, software, and finite lived intangibles, stock-based compensation, stock-based compensation including the determination of the fair value of the Company’s stock prior to its IPO, fair value of common stock and redeemable convertible preferred stock prior to the IPO, valuation of long-lived assets and their recoverability, including goodwill, the incremental borrowing rate for operating leases, estimated expected period of benefit period for deferred contract costs, fair value of the liability component of the convertible debt, realization of deferred tax assets and uncertain tax positions, revenue recognition and the allocation of overhead costs between cost of revenue and operating expenses. The Company bases its estimates on historical experience and also on assumptions that management considers reasonable. The Company assesses these estimates on a regular basis; however, actual results could materially differ from these estimates.
Foreign Currency Translation	Foreign Currency Translation The reporting currency of the Company is the United States dollar (“USD”). The functional currency of the Company is USD, and the functional currency of the Company’s subsidiaries is generally the local currency of the jurisdiction in which the foreign subsidiary is located. The assets and liabilities of the Company’s subsidiaries are translated to USD at exchange rates in effect at the balance sheet date. All income statement accounts are translated at monthly average exchange rates. Resulting foreign currency translation adjustments are recorded directly in accumulated other comprehensive (loss) income as a separate component of stockholders’ equity. Transaction gains and losses that arise from exchange rate fluctuations on transactions denominated in a currency other than the functional currency are included in other income (loss), net in the accompanying consolidated statements of operations when realized.
Revenue Recognition	Revenue Recognition The Company generates revenue from the sale of subscriptions to customers using its cloud-based platform. The terms of the Company’s subscription agreements are primarily monthly, annual or multi-year. The Company’s customers can enter into (1) a subscription agreement for a committed contractual amount of usage that is apportioned ratably on a monthly basis over the term of the subscription period, (2) a subscription agreement for a committed contractual amount of usage that is delivered as used, or (3) a monthly subscription based on usage. The Company typically bills customers on an annual or multi-year subscription in advance, with any usage in excess of the committed contracted amount billed monthly in arrears. The Company typically bills customers on a monthly plan in arrears. Customers also have the option to purchase additional services priced at rates at or above the stand-alone selling price. The Company accounts for revenue contracts with customers through the following steps: (1) identify the contract with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when or as the Company satisfies a performance obligation. The Company’s revenue arrangements may include infrastructure monitoring, application performance monitoring, log management, synthetics monitoring, security monitoring, continuous profiling, serverless monitoring, network monitoring, real user monitoring and incident management as well as secondary services including custom metrics in dashboard monitoring, docker container monitoring, and indexed spans. The Company has identified each service as a separate performance obligation. The transaction price is based on the fixed price for the contracted level of service plus variable consideration for additional optional purchases. Billing periods correspond to the periods over which services are performed and there are no discounts given on the purchase of future services. The Company allocates revenue to each performance obligation based on its relative standalone selling price. The Company generally determines standalone selling prices based on a range of actual prices charged to customers. Revenue is recognized when control of these services is transferred to customers, in an amount that reflects the consideration the Company expects to be entitled to receive in exchange for those services. The Company determined an output method to be the most appropriate measure of progress because it most faithfully represents when the value of the services is simultaneously received and consumed by the customer, and control is transferred. For committed contractual amounts of usage, revenue is recognized ratably over the term of the subscription agreement generally beginning on the date that the platform is made available to a customer. For committed contractual amount of usage that is delivered as used, a monthly subscription based on usage, or usage in excess of a ratable subscription, the Company recognizes revenue as the product is used. Subscription revenue excludes sales and other indirect taxes. The Company applied the practical expedient in Topic 606 and did not evaluate contracts of one year or less for the existence of a significant financing component. Deferred Revenue and Remaining Performance Obligations Certain of the Company’s customers pay in advance of satisfaction of performance obligations and other customers with monthly contract terms are billed in arrears on a monthly basis. The Company records contract liabilities to deferred revenue when customers are billed or when the Company receives customer payments in advance of the performance obligations being satisfied on the Company’s contracts. 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.
Convertible Senior Notes	Convertible Senior Notes In accounting for the issuance of the Company’s convertible senior notes (the “2025 Notes”), the 2025 Notes were separated into liability and equity components through December 31, 2020. The carrying amounts of the liability component was calculated by measuring the fair value of similar liabilities that do not have associated convertible features. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the par value of the respective 2025 Notes. This difference represents the debt discount that is amortized to interest expense over the contractual terms of the 2025 Notes using the effective interest rate method. The equity component was recorded in additional paid-in capital. In accounting for the debt issuance costs related to the 2025 Notes, the Company allocated the total amount incurred to the liability and equity components of the 2025 Notes in the same proportion as the allocation of the proceeds. Issuance costs attributable to the liability component are being amortized to interest expense over the contractual terms of the 2025 Notes. The issuance costs attributable to the equity component were netted against the equity component in additional paid-in capital.
Cost of Revenue	Cost of Revenue Cost of revenue consists primarily of costs related to providing subscription services to paying customers, including data center and networking expenses, employee compensation (including stock-based compensation) and other employee-related expenses for customer experience and technical operations staff, payments to outside service providers, payment processing fees, amortization of capitalized internally developed software costs and acquired developed technology, and allocated overhead costs.
Research and Development Costs	Research and Development Costs Research and development costs are expensed as incurred. Research and development costs consist of employee compensation (including stock-based compensation) and other employee-related expenses, materials and supplies, and allocated overhead costs such as rent and facilities costs.
Sales and Marketing Costs	Sales and Marketing Costs Sales and marketing costs consist primarily of personnel costs for the Company’s sales and marketing organization, including stock-based compensation and commissions, costs of general marketing and promotional activities, including the free tier and introductory trials of the Company’s products, travel-related expenses and allocated overhead costs.
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred and were approximately $20.8 million, $21.6 million and $9.5 million for the years ended December 31, 2021, 2020 and 2019, respectively, and are included in sales and marketing expense in the accompanying consolidated statement of operations.
Income Taxes	Income Taxes The Company recognizes deferred tax assets and liabilities for the expected future tax consequences of temporary differences between the carrying amounts for financial reporting and the tax bases of assets and liabilities. The deferred assets and liabilities are recorded at the statutorily enacted tax rates anticipated to be in effect when such temporary differences reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period that includes the enactment date. A valuation allowance is established; when based upon the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. The Company engages in transactions in which the tax consequences may be subject to uncertainty. The Company accounts for uncertain tax positions based on an evaluation as to whether it is more likely than not that a tax position will be sustained on audit, including resolution of any related appeals or litigation processes. This evaluation is based on all available evidence and assumes that the appropriate tax authorities have full knowledge of all relevant information concerning the tax position. The Company accounts for uncertain tax positions as non-current tax liabilities or through a reduction of a corresponding deferred tax asset. The tax benefit recognized is based on the largest amount that is greater than 50% likely of being realized upon ultimate settlement. The Company includes potential interest expense and penalties related to its uncertain tax positions in income tax expense.
Stock-Based Compensation	Stock-Based Compensation The Company recognizes and measures compensation expense for all stock-based payment awards granted to employees, directors, and nonemployees, including stock options, restricted stock units (“RSUs”), and the employee stock purchase plan (the “ESPP”) based on the fair value of the awards on the date of grant. The fair value of each stock option granted is estimated using the Black-Scholes option pricing model. The determination of the grant date fair value using an option-pricing model is affected by the estimated fair value of the Company’s common stock as well as assumptions regarding a number of other complex and subjective variables. These variables include expected stock price volatility over the expected term of the award, actual and projected employee stock option exercise behaviors, the risk-free interest rate for the expected term of the award and expected dividends. The fair value of RSUs is determined by the closing price on the date of grant of the Company’s Class A common stock, as reported on The Nasdaq Global Select Market. The Company estimates the fair value of the rights to acquire stock under the ESPP using the Black-Scholes option pricing model. Stock-based compensation is recognized on a straight-line basis over the requisite service period and account for forfeitures as they occur.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents. Cash equivalents consist of funds deposited into money market funds.
Marketable Securities	Marketable Securities The Company’s marketable securities consist of commercial debt securities, U.S. government treasury securities, Non-U.S. government securities, and commercial paper. The Company determines the appropriate classification of its marketable securities at the time of purchase and reevaluates such designation at each balance sheet date. The Company has classified and accounted for its marketable securities as available-for-sale securities as the Company may sell these securities at any time for use in its current operations or for other purposes, even prior to maturity. As a result, the Company classifies its marketable securities within current assets on the consolidated balance sheet. Available-for-sale securities are recorded at fair value each reporting period. Premiums and discounts are amortized or accreted over the life of the related available-for-sale security as an adjustment to yield using the effective interest method. Interest income is recognized when earned. Unrealized gains and losses on these marketable securities are presented net of tax and reported as a separate component of accumulated other comprehensive income until realized. Realized gains and losses are determined based on the specific identification method and are reported in Interest income and other income, net in the consolidated statements of operations. The Company periodically evaluates its marketable securities to assess whether an investment’s fair value is less than its amortized cost basis and if the decline in the fair value is attributable to a credit loss. Declines in fair value judged to be related to credit loss are reported in Interest income and other income, net in the consolidated statements of operations.
Restricted Cash	Restricted Cash Restricted cash primarily consists of collateralized letters of credit established in connection with lease agreements for the Company’s facilities. Restricted cash is included in current assets for leases that expire within one year and is included in non-current assets for leases that expire in more than one year from the balance sheet date.
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments that potentially subject the Company to credit risk primarily consist of cash and cash equivalents, marketable securities and accounts receivable. Cash deposits may, at times, exceed amounts insured by the Federal Deposit Insurance Corporation (“FDIC”) and the Securities Investor Protection Corporation (“SIPC”). The Company has not experienced any losses on its deposits of cash and cash equivalents to date. For accounts receivable, the Company is exposed to credit risk in the event of nonpayment by customers to the extent of the amounts recorded on the accompanying consolidated balance sheets.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The accounting guidance for fair value provides a framework for measuring fair value, clarifies the definition of fair value, and expands disclosures regarding fair value measurements. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the reporting date. The accounting guidance establishes a three-tiered hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value as follows: Level 1 Inputs: Unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date. Level 2 Inputs: Other than quoted prices included in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability. Level 3 Inputs: Unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at measurement date. The Company’s financial instruments consist of cash equivalents, marketable securities, accounts receivable, accounts payable and accrued expenses. Cash equivalents are stated at amortized cost, which approximates fair value at the balance sheet dates, due to the short period of time to maturity. Marketable securities are recorded at fair value. Accounts receivable, accounts payable, and accrued expenses are stated at their carrying value, which approximates fair value due to the short time to the expected receipt or payment date. A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.
Accounts Receivable and Allowance for Credit Losses	Accounts Receivable and Allowance for Credit Losses Accounts receivable includes billed and unbilled receivables. Trade accounts receivable are recorded at invoiced amounts and do not bear interest. The expectation of collectability is based on a review of credit profiles of customers, contractual terms and conditions, current economic trends, and historical payment experience. The Company regularly reviews the adequacy of the allowance for credit losses by considering the age of each outstanding invoice and the collection history to determine the appropriate amount of allowance for credit losses. Accounts receivable deemed uncollectible are charged against the allowance for credit losses when identified. Unbilled accounts receivable represents revenue recognized on contracts for which billings have not yet been presented to customers because the amounts were earned but not contractually billable as of the balance sheet date, substantially all of which is expected to be billed and collected within one year.
Internal Use Software Development Costs	Internal Use Software Development Costs The Company capitalizes qualifying internal use software development costs related to its cloud platform. The costs consist of personnel costs (including related benefits and stock-based compensation) that are incurred during the application development stage. Capitalization of costs begins when two criteria are met: (1)the preliminary project stage is completed, and (2) it is probable that the software will be completed and used for its intended function. Capitalization ceases when the software is substantially complete and ready for its intended use, including the completion of all significant testing. Costs related to preliminary project activities and post implementation operating activities are expensed as incurred. Capitalized costs are included in property and equipment. These costs are amortized over the estimated useful life of the software, which is two years, on a straight-line basis, which represents the manner in which the expected benefit will be derived. The amortization of costs related to the platform applications is included in cost of revenue and sales and marketing expense based on an allocation between paid customer accounts and free customer accounts not generating revenue.
Property and Equipment, Net	Property and Equipment, Net Property and equipment, net is stated at cost less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful life of the related asset. Expenses that improve an asset or extend its remaining useful life are capitalized. Costs of maintenance or repairs that do not extend the lives of the respective assets are charged to expenses as incurred.
Deferred Contract Costs	Deferred Contract Costs Sales commissions earned by the Company’s sales force are considered incremental and recoverable costs of obtaining a contract with a customer. There are no sales commissions earned on renewals . These costs are deferred and then amortized over a period of benefit which is determined to be four years. The Company determined the period of benefit by taking into consideration the length of terms in its customer contracts, life of the technology and other factors . Amounts expected to be recognized within one year of the balance sheet date are recorded as deferred contract costs, current; the remaining portion is recorded as deferred contract costs, non-current, in the consolidated balance sheets. Deferred contract costs are periodically analyzed for impairment. Amortization expense is included in sales and marketing expenses in the accompanying consolidated statements of operations.
Business Combinations	Business Combinations When the Company acquires a business, the purchase consideration is allocated to the tangible assets acquired, liabilities assumed, and intangible assets acquired based on their estimated respective fair values. The excess of the fair value of purchase consideration over the fair values of these identifiable assets and liabilities is recorded as goodwill. Such valuations require the Company to make significant estimates and assumptions, especially with respect to intangible assets. Significant estimates in valuing certain intangible assets include, but are not limited to, future expected cash flows from acquired users, acquired technology, and trade names from a market participant perspective, useful lives and discount rates. The Company’s estimates of fair value are based upon assumptions believed to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates. During the measurement period, the Company may record adjustments to the assets acquired and liabilities assumed, with the corresponding offset to goodwill. Upon the conclusion of the measurement period, any subsequent adjustments are recorded to other income, net in the consolidated statement of operations.
Accounting for Impairment of Long-Lived Assets (Including Goodwill and Intangibles)	Accounting for Impairment of Long-Lived Assets (Including Goodwill and Intangibles) Long-lived assets with finite lives include property and equipment, capitalized development software costs and acquired intangible assets. Long-lived assets are amortized over their estimated useful lives which are as follows: Computers and equipment 3 years Furniture and fixtures 5 years Leasehold improvements Shorter of lease term or useful life of asset Capitalized software development costs 2 years Developed technology 3 years Customer relationships 4 years The Company evaluates long lived assets, including acquired intangible assets and capitalized software development costs, for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable or the estimated useful life becomes shorter than originally estimated. Recoverability of assets held and used is measured by comparison of the carrying amount of an asset or an asset group to estimated undiscounted future net cash flows expected to be generated by the asset or asset group. If the carrying amount of an asset exceeds these estimated future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the assets exceeds the fair value of the asset or asset group, based on discounted cash flows. Goodwill is not amortized but rather tested for impairment at least annually on October 1, or more frequently if events or changes in circumstances indicate that goodwill may be impaired. Goodwill impairment is recognized when the quantitative assessment results in the carrying value exceeding the fair value, in which case an impairment charge is recorded to the extent the carrying value exceeds the fair value. The Company did not recognize any impairment of goodwill during the years ended December 31, 2021, 2020 or 2019.
Operating Leases	Operating Leases The Company determines if an arrangement is a lease at inception. Operating lease assets and liabilities are reflected within operating lease assets, operating lease liabilities, current, and operating lease liabilities, non-current, on the consolidated balance sheets. For short-term leases (an initial term of 12 months or less), an operating lease asset and corresponding lease liability are not recorded and the Company records rent expense in its consolidated statements of operations on a straight-line basis over the lease term. Operating lease assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of the Company’s leases do not provide an implicit rate, the Company generally uses its incremental borrowing rate based on the estimated rate of interest for collateralized borrowing over a similar term of the lease payments at commencement date. The operating lease assets also include any lease payments made and excludes lease incentives. The Company’s lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company has lease agreements with lease and non-lease components, which are accounted for separately.
Net Income (Loss) Per Share Attributable to Common Shareholders	Net Income (Loss) Per Share Attributable to Common Stockholders Basic net income (loss) per share is computed by dividing net income (loss) by the weighted-average number of shares of common stock outstanding during the period. Diluted net income (loss) per share is computed by dividing net income (loss) by the weighted-average number of shares of common stock outstanding during the period giving effect to all potentially dilutive securities to the extent they are dilutive. The dilutive effect of potentially dilutive securities is reflected in diluted net income (loss) per share by application of the two-class method. During the periods when the Company is in a net loss position, the net loss attributable to common stockholders was not allocated to the convertible preferred stock and unvested common stock under the two-class method as these securities do not have a contractual obligation to share in the Company’s losses.
Accounting Pronouncements Recently Adopted and Accounting Pronouncements Not Yet Adopted	Accounting Pronouncements Recently Adopted In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU No. 2016-13”), which requires an entity to utilize a new impairment model known as the current expected credit loss (“CECL”) model to estimate its lifetime “expected credit loss” and record an allowance that, when deducted from the amortized cost basis of the financial asset, presents the net amount expected to be collected on the financial asset. The CECL model is expected to result in more timely recognition of credit losses. Additionally, ASU No. 2016-13 amends the current available-for-sale security impairment model for debt securities held for investment. The new model will require an estimate of expected credit losses when the fair value is below the amortized cost of the asset. The credit-related impairment (and subsequent recoveries) are recognized as an allowance on the balance sheet with a corresponding adjustment to the income statement. Non-credit related losses will continue to be recognized through Other Comprehensive Income (Loss) (“OCI”). This guidance also requires new disclosures for financial assets measured at amortized cost, loans and available-for-sale debt securities. Entities will apply the standard’s provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. The Company adopted this ASU on January 1, 2020 and determined that ASU No. 2016-13 had no material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (“ASU No. 2018-15”), which aligns the accounting for implementation costs incurred in a hosting arrangement that is a service contract with the accounting for implementation costs incurred to develop or obtain internal-use software under Accounting Standard Codification (“ASC”) 350-40, Internal-Use Software , in order to determine which costs to capitalize and recognize as an asset and which costs to expense. The Company adopted ASU No. 2018-15 on January 1, 2020 and applied it prospectively to implementation costs incurred after the date of adoption. The Company’s adoption of ASU No. 2018-15 had no material impact on the Company's consolidated financial statements. In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU No. 2019-12”), which aims to reduce complexity in accounting standards by improving certain areas of GAAP without compromising information provided to users of financial statements. ASU No. 2019-12 removes certain exceptions to the general principles in Topic 740 and clarifies and amends existing guidance to improve consistent application. It is effective for interim and annual periods beginning after December 15, 2020, with early adoption permitted. The Company early adopted ASU No. 2019-12 during the quarter ended September 30, 2020 with no material impact on the Company’s consolidated financial statements. In August 2020, the FASB issued ASU No. 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity (“ASU No. 2020-06”), which simplifies the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts in an entity's own equity. Among other changes, ASU No. 2020-06 removes from GAAP the liability and equity separation model for convertible instruments with a cash conversion feature, and as a result, after adoption, entities will no longer separately present in equity an embedded conversion feature for such convertible debt instruments. Similarly, the debt discount, that is equal to the carrying value of the embedded conversion feature upon issuance, will no longer be amortized into income as interest expense over the life of the instrument. Instead, entities will account for a convertible debt instrument wholly as debt unless (1) a convertible instrument contains features that require bifurcation as a derivative under ASC Topic 815, Derivatives and Hedging, or (2) a convertible debt instrument was issued at a substantial premium. Among other potential impacts, this change is expected to reduce reported interest expense, increase reported net income and result in a reclassification of certain conversion feature balance sheet amounts from stockholders’ equity to liabilities. Additionally, ASU No. 2020-06 requires the application of the if-converted method to calculate the impact of convertible instruments on diluted earnings per share 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. ASU No. 2020-06 is effective for fiscal years beginning after December 15, 2021, with early adoption permitted for fiscal years beginning after December 15, 2020 and can be adopted on either a fully retrospective or modified retrospective basis. The Company early adopted ASU No. 2020-06 on January 1, 2021, using the modified retrospective basis. Adoption resulted in a $16.8 million decrease to the opening balance of accumulated deficit, a $173.1 million decrease to the opening balance of additional paid-in capital and a $156.3 million increase to the opening balance of Convertible senior notes, net on the consolidated balance sheet. Accounting Pronouncements Not Yet Adopted In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers ("ASU No. 2021-08"), which intends to improve the accounting for acquired revenue contracts with customers in a business combination by addressing diversity in practice and inconsistency related to recognition of an acquired contract liability and payment terms and their effect on subsequent revenue recognized by the acquirer. The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years, and should be applied prospectively to business combinations occurring on or after the effective date of the amendments. Early adoption of the amendments is permitted, including adoption in an interim period. An entity that early adopts in an interim period should apply the amendments (1) retrospectively to all business combinations for which the acquisition date occurs on or after the beginning of the fiscal year that includes the interim period of early application and (2) prospectively to all business combinations that occur on or after the date of initial application. The Company is currently evaluating the impact of the adoption of this standard on its consolidated financial statements.

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Schedule of Long-lived Assets Estimated Useful Lives	Long-lived assets with finite lives include property and equipment, capitalized development software costs and acquired intangible assets. Long-lived assets are amortized over their estimated useful lives which are as follows: Computers and equipment 3 years Furniture and fixtures 5 years Leasehold improvements Shorter of lease term or useful life of asset Capitalized software development costs 2 years Developed technology 3 years Customer relationships 4 years

Marketable Securities (Tables)

Marketable Securities (Tables)	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Summary of Available-for-Sale Marketable Securities	The following is a summary of available-for-sale marketable securities, excluding those securities classified within cash and cash equivalents on the consolidated balance sheet as of December 31, 2021 and December 31, 2020 (in thousands): December 31, 2021 Amortized Unrealized Unrealized Fair Commercial debt securities $ 1,034,573 $ 43 $ (2,564) $ 1,032,052 Certificates of deposit 14,574 5 (10) 14,569 U.S. government treasury securities 77,628 18 (204) 77,442 Commercial paper 151,379 14 (37) 151,356 Non-U.S. government securities 8,071 — (17) 8,054 Marketable securities $ 1,286,225 $ 80 $ (2,832) $ 1,283,473 December 31, 2020 Amortized Unrealized Unrealized Fair Commercial debt securities $ 926,836 $ 1,157 $ (143) $ 927,850 Certificates of deposit 47,214 43 (1) 47,256 U.S. government treasury securities 108,092 203 (1) 108,294 Commercial paper 209,111 32 (11) 209,132 Marketable securities $ 1,291,253 $ 1,435 $ (156) $ 1,292,532
Summary of Fair Values of Available-for-Sale Marketable Securities, by Remaining Contractual Maturity	As of December 31, 2021, the fair values of available-for-sale marketable securities, by remaining contractual maturity, were as follows (in thousands): Due within one year $ 783,342 Due in one year through five years 500,131 Total $ 1,283,473

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Summary of Financial Assets and Liabilities Measured at Fair Value on 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 December 31, 2021 and 2020, and indicate the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands): Fair Value Measurement as of December 31, 2021 Level 1 Level 2 Level 3 Total Financial Assets: Cash equivalents: Money market funds $ 241,571 $ — $ — $ 241,571 Commercial paper — — — — Marketable Securities: Corporate debt securities — 1,032,052 — 1,032,052 Certificates of deposit — 14,569 — 14,569 U.S. government treasury securities — 77,442 — 77,442 Commercial paper — 151,356 — 151,356 Non-U.S. government securities — 8,054 — 8,054 Total financial assets $ 241,571 $ 1,283,473 $ — $ 1,525,044 Fair Value Measurement as of December 31, 2020 Level 1 Level 2 Level 3 Total Financial Assets: Cash equivalents: Money market funds $ 181,743 $ — $ — $ 181,743 Commercial paper — 25,195 — 25,195 Marketable Securities: Corporate debt securities — 927,850 — 927,850 Certificates of deposit — 47,256 — 47,256 U.S. government treasury securities — 108,294 — 108,294 Commercial paper — 209,132 — 209,132 Total financial assets $ 181,743 $ 1,317,727 $ — $ 1,499,470

Prepaid Expenses and Other Cu_2

Prepaid Expenses and Other Current Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Prepaid Expense and Other Assets, Current [Abstract]
Schedule of Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets consisted of the following (in thousands): December 31, December 31, General prepaid expenses $ 13,698 $ 8,224 Other receivables 6,768 7,836 Rent 2,092 336 Hosting 1,805 7,196 Marketing 80 32 Total prepaid expenses and other current assets $ 24,443 $ 23,624

Property and Equipment, Net (Ta

Property and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Components of Property and Equipment, Net	Property and equipment, net consisted of the following (in thousands): December 31, December 31, Computers and equipment $ 16,885 $ 11,490 Furniture and fixtures 6,595 5,087 Leasehold improvements 20,669 17,639 Capitalized software development costs 86,189 48,502 Total property and equipment $ 130,338 $ 82,718 Less: accumulated depreciation and amortization (55,186) (35,521) Total property and equipment, net $ 75,152 $ 47,197

Acquisition, Intangible Asset_2

Acquisition, Intangible Assets and Goodwill (Tables)	12 Months Ended
	Dec. 31, 2021
Acquisitions, Intangible Assets And Goodwill [Abstract]
Schedule of Intangibles, Net	Intangibles, net consisted of the following (in thousands): December 31, 2021 Gross Accumulated Net Amortization Developed technology $ 17,186 $ (4,182) $ 13,004 3 years Customer relationships 3,300 (600) 2,700 4 years Total $ 20,486 $ (4,782) $ 15,704 December 31, 2020 Gross Accumulated Net Amortization Developed technology $ 3,331 $ (1,262) $ 2,069 3 years
Schedule of Future Amortization Expense	As of December 31, 2021, future amortization expense by year is expected to be as follows (in thousands): Amount 2022 $ 6,507 2023 5,985 2024 2,987 2025 225 Total $ 15,704
Schedule of Changes in Carrying Amount of Goodwill	The changes in the carrying amount of goodwill were as follows (in thousands): Amount Balance as of December 31, 2020 $ 17,609 2021 acquisitions 275,229 Foreign currency translation adjustments (662) Balance as of December 31, 2021 $ 292,176

Accrued Expenses and Other Cu_2

Accrued Expenses and Other Current Liabilities (Tables)	12 Months Ended
	Dec. 31, 2021
Payables and Accruals [Abstract]
Schedule of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities consisted of the following (in thousands): December 31, December 31, Accrued expenses $ 50,885 $ 20,008 Accrued compensation and commissions 43,050 22,186 Other tax liability and sales tax 17,316 12,558 Early exercise liability-stock options 33 599 Total accrued expenses and other current liabilities $ 111,284 $ 55,351

Convertible Senior Notes (Table

Convertible Senior Notes (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Summary of Net Carrying Amount of Liability and Equity Component of 2025 Notes	The net carrying amount of the liability component of the 2025 Notes was as follows (in thousands): December 31, December 31, Convertible senior notes, net: Principal $ 747,500 $ 747,500 Unamortized debt discount (1) — (159,547) Unamortized debt issuance costs (1) (12,018) (12,089) Net carrying amount $ 735,482 $ 575,864 Equity component (1) $ — $ 173,070 _____________________ 1) As noted above, December 31, 2020 amounts have not been adjusted due to the adoption of ASU 2020-06 under the modified retrospective method.
Interest Expense related to 2025 Notes	The following table sets forth the interest expense related to the 2025 Notes for years ended December 31, 2021 (in thousands): Year Ended December 31, 2021 2020 Contractual interest expense $ 934 $ 540 Amortization of debt discount — 17,621 Amortization of issuance costs 3,349 1,106 Total $ 4,283 $ 19,267

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Summary of Components of Lease Cost Recognized	The components of lease cost recognized within the Company’s consolidated statements of operations were as follows (in thousands): Year Ended December 31, 2021 Year Ended December 31, 2020 Operating lease cost (1) $ 20,198 $ 17,081 Short-term lease cost 3,609 3,717 _____________________ 1) Includes non-cash lease expense of $17.2 million and $14.0 million for the years ended December 31, 2021 and 2020, respectively.
Summary of Supplemental Cash Flow Information and Non-cash Activity	Supplemental cash flow information and non-cash activity related to the Company’s operating leases are as follows (in thousands): Year Ended December 31, 2021 Year Ended December 31, 2020 Cash paid for amounts included in measurement of lease liabilities $ 20,741 $ 15,074 Operating lease assets obtained in exchange for new lease liabilities 17,476 17,379
Summary of Maturities of Lease Liabilities	Maturities of lease liabilities by fiscal year for the Company’s operating leases are as follows (in thousands): Amount 2022 $ 22,907 2023 19,127 2024 9,591 2025 7,633 2026 6,109 Thereafter 15,528 Total lease payments $ 80,895 Less: imputed interest (8,633) Present value of lease liabilities $ 72,262
Summary of Weighted Average Remaining Lease Term and Discount Rate	Weighted average remaining lease term and discount rate for the Company’s operating leases are as follows: December 31, December 31, Weighted average remaining lease term (years) 4.9 4.4 Weighted average discount rate 4.55 % 4.71 %

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Schedule of Revenue by Geographic Area	Revenue by location is determined by the billing address of the customer. The following table sets forth revenue by geographic area (in thousands): Year Ended December 31, 2021 2020 2019 North America $ 736,218 $ 449,899 $ 272,190 International 292,566 153,567 90,590 Total $ 1,028,784 $ 603,466 $ 362,780

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Summary of Reserved Shares of Common Stock for Future Issuance	As of December 31, 2021 and 2020, the Company had reserved shares of common stock for future issuance as follows: December 31, 2021 2020 Options and RSU's outstanding 29,453,830 32,235,043 Shares available for future option and RSU grants 54,279,321 42,797,432 Shares subject to the employee stock purchase plan 11,989,812 9,222,883 95,722,963 84,255,358
Summary of Fair Value Assumptions	The following table summarizes the assumptions used during the years ended December 31, 2021, 2020 and 2019: Year Ended December 31, 2021 (1) 2020 2019 Expected volatility n/a 38.9% 38.9% - 39.5% Risk-free interest rate n/a 1.7% 1.4% - 2.6% Expected dividend yield n/a —% —% Expected term (in years) n/a 6.1 5.2 - 6.3 Fair value of common stock n/a $41.19 $6.16 - $38.21 _____________________ 1) There were no stock options granted during the year ended December 31, 2021.
Summary of Stock Option Activity	The following table summarizes the Company's stock option activity and weighted-average exercise prices: Number of Weighted- Weighted- Aggregate Balance—December 31, 2019 36,384,767 $ 2.96 7.6 $ 1,266,938 Options granted 14,600 41.19 Options exercised (8,753,274) 1.83 Options forfeited or expired (577,770) 4.93 Balance—December 31, 2020 27,068,323 $ 3.31 6.7 $ 2,575,069 Exercisable—December 31, 2020 16,545,562 $ 1.39 5.9 $ 1,605,723 Balance—December 31, 2020 27,068,323 $ 3.31 6.7 $ 2,575,069 Options granted — — Options exercised (5,109,688) 2.92 Options forfeited or expired (586,074) 6.40 Balance—December 31, 2021 21,372,561 $ 3.31 5.5 $ 3,735,819 Exercisable—December 31, 2021 16,682,455 $ 2.07 5.0 $ 2,936,715
Summary of Activity for Unvested RSUs	The following table summarizes the activity for the Company’s unvested RSUs: Shares Weighted-Average Aggregate Unvested and outstanding balance as of December 31, 2020 5,166,720 $ 59.50 $ 508,612 Awarded 5,208,252 124.47 Vested (1,483,639) 54.89 Forfeited/canceled (810,064) 69.53 Unvested and outstanding balance as of December 31, 2021 8,081,269 $ 101.21 $ 1,439,355
Summary of Stock-based Compensation Expense	Stock-based compensation expense was included in the consolidated statement of operations as follows (in thousands): Year Ended December 31, 2021 2020 2019 Cost of revenue $ 4,565 $ 1,794 $ 582 Research and development 101,942 38,008 7,972 Sales and marketing 35,035 20,467 5,538 General and administrative 22,195 14,105 4,942 Stock-based compensation, net of amounts capitalized 163,737 74,374 19,034 Capitalized stock-based compensation expense 9,660 3,404 201 Total stock-based compensation expense $ 173,397 $ 77,778 $ 19,235

Interest Income and Other Inc_2

Interest Income and Other Income, Net (Tables)	12 Months Ended
	Dec. 31, 2021
Interest and Other Income [Abstract]
Schedule of Interest Income and Other Income, Net	Interest income and other income, net consist of the following (in thousands): For the Year Ended December 31, 2021 2020 2019 Interest income $ 21,412 $ 21,234 $ 4,110 Other income, net 374 751 86 Interest income and other income, net $ 21,786 $ 21,985 $ 4,196

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Components of Loss before Income Taxes	Income Taxes — For financial reporting purposes, loss before income taxes, includes the following components (in thousands): December 31, 2021 2020 2019 Domestic $ (29,617) $ (32,033) $ (18,330) Foreign 11,195 9,811 2,354 Loss before income taxes $ (18,422) $ (22,222) $ (15,976)
Summary of Income Taxes Allocated to Operations	Total income taxes allocated to operations for the years ended December 31, 2021, 2020 and 2019 were as follows (in thousands): 2021 Current Deferred Total Federal $ 232 $ — $ 232 State 44 — 44 Foreign 2,091 (44) 2,047 Total $ 2,367 $ (44) $ 2,323 2020 Current Deferred Total Federal $ — $ — $ — State 124 — 124 Foreign 2,239 (38) 2,201 Total $ 2,363 $ (38) $ 2,325 2019 Current Deferred Total Federal $ — $ — $ — State 126 — 126 Foreign 967 (359) 608 Total $ 1,093 $ (359) $ 734
Summary of Tax Rate Reconciliation	Tax Rate Reconciliation —Income tax expense was $2.3 million, $2.3 million and $0.7 million for the years ended December 31, 2021, 2020 and 2019, respectively, and differed from the amounts computed by applying the U.S. federal statutory income tax rate of 21% for the years ended December 31, 2021, 2020 and 2019, to pretax loss from operations as a result of the following (in thousands): December 31, 2021 2020 2019 Income tax expense at federal statutory rate $ (3,868) $ (4,667) $ (3,355) Nondeductible expenses 368 132 380 State taxes (net of federal benefit) 18 98 100 Net change in valuation allowance 62,173 51,892 5,043 Uncertain tax positions (728) 17 23 US tax costs on international operations 1,478 1,818 201 Foreign taxes 424 126 92 Share based compensation deductions (57,350) (47,032) (1,630) Return to provision (193) (48) (120) Other 1 (11) — Total $ 2,323 $ 2,325 $ 734
Components of Deferred Tax Assets and Liabilities	Components of Deferred Taxes —The tax effects of temporary differences that give rise to the deferred tax assets and deferred tax liabilities at December 31, 2021 and 2020 are presented below (in thousands): December 31, 2021 2020 Deferred tax assets: Net operating losses $ 128,263 $ 66,801 Stock-based compensation 23,669 11,820 Accrued bonus 2,438 536 Internal use software 2,220 2,153 Lease liability 14,374 12,566 Convertible senior notes - issuance costs — 832 Fixed assets 1,654 982 Other 5,517 1,114 Total deferred tax assets $ 178,135 $ 96,804 Less: valuation allowance (148,648) (33,847) Deferred tax assets, net of valuation allowance $ 29,487 $ 62,957 Deferred tax liabilities: Commissions (16,590) (10,247) Right of use asset (12,815) (11,394) Convertible senior notes — (40,478) Other — (800) Total deferred tax liabilities $ (29,405) $ (62,919) Deferred tax assets, net $ 82 $ 38
Summary of Changes in Gross Amount of Unrecognized Tax Benefits	The following table shows the changes in the gross amount of unrecognized tax benefits as of December 31, 2021 , 2020 and 2019 (in thousands): December 31, 2021 2020 2019 Beginning balance $ 532 $ 920 $ 920 Increases based on tax positions during the current period — — (Decreases) based on tax positions during the current period (426) (388) — Ending balance $ 106 $ 532 $ 920

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Schedule of Calculation of Basic and Diluted Net Loss Per Share	The following table presents the calculation of basic and diluted net loss per share (in thousands, except per share data): Year Ended December 31, 2021 2020 2019 Basic net loss per share: Class A Class B Class A Class B Class A Class B Numerator: Net loss $ (16,177) $ (4,568) $ (13,614) $ (10,933) $ (1,149) $ (15,561) Denominator: Weighted average shares used in calculating net loss per share, basic 240,999 68,049 166,582 133,768 9,611 130,262 Basic net loss per share $ (0.07) $ (0.07) $ (0.08) $ (0.08) $ (0.12) $ (0.12) Diluted net loss per share: Numerator: Allocation of distributed loss for basic computation $ (16,177) $ (4,568) $ (13,614) $ (10,933) $ (1,149) $ (15,561) Reallocation of undistributed loss as a result of conversion of Class B to Class A shares (4,568) (10,933) — (15,561) — Allocation of undistributed loss $ (20,745) $ (4,568) $ (24,547) $ (10,933) $ (16,710) $ (15,561) Denominator: Number of shares used in basic calculation 240,999 68,049 166,582 133,768 9,611 130,262 Weighted average effect of diluted securities: Conversion of Class B to Class A common shares outstanding 68,049 133,768 — 130,262 — Number of shares used in diluted calculation 309,048 68,049 300,350 133,768 139,873 130,262 Diluted net loss per share $ (0.07) $ (0.07) $ (0.08) $ (0.08) $ (0.12) $ (0.12)
Schedule of Potentially Dilutive Securities not Included in Diluted Per Share Calculations	Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows (in thousands): Year Ended December 31, 2021 2020 2019 Shares subject to outstanding stock options and RSUs 29,454 32,235 37,032 Unvested early exercised stock options and restricted shares of common stock 946 718 1,240 Shares subject to the employee stock purchase plan 94 141 353 Shares issuable upon conversion of the convertible senior notes 8,098 608 — Total 38,592 33,702 38,625

Basis of Presentation and Sum_4

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details)	Sep. 25, 2019USD ($)$ / sharesshares	Sep. 23, 2019USD ($)$ / sharesshares	Sep. 06, 2019shares	Dec. 31, 2021USD ($)Segmentshares	Dec. 31, 2020USD ($)shares	Dec. 31, 2019USD ($)	Jan. 01, 2021USD ($)	Jun. 02, 2020USD ($)	Dec. 31, 2018USD ($)
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Proceeds from initial public offering, net of underwriting discounts and commissions and other offering costs				$ 0	$ (421,000)	$ 706,317,000
Common stock, shares authorized (in shares) | shares		2,330,000,000	380,000,000
Preferred stock, shares authorized (in shares) | shares		20,000,000
Stockholders' equity				1,041,203,000	957,432,000	782,341,000			$ (76,041,000)
Convertible senior notes, net				735,482,000	575,864,000
Sales commissions related to renewals				$ 0
Deferred contract costs amortization period				4 years
Impairment of goodwill				$ 0	0	0
Number of operating segment | Segment				1
Number of reportable segment | Segment				1
Stock split, conversion ratio			0.3333
Accumulated Deficit
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Stockholders' equity				$ (152,106,000)	(148,163,000)	(123,616,000)			(106,906,000)
Additional Paid-in Capital
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Stockholders' equity				$ 1,197,136,000	1,103,305,000	905,821,000			$ 30,834,000
Cumulative Effect, Period of Adoption, Adjustment
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Stockholders' equity					(156,268,000)
Cumulative Effect, Period of Adoption, Adjustment | ASU No. 2020-06
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Convertible senior notes, net							$ 156,300,000
Cumulative Effect, Period of Adoption, Adjustment | Accumulated Deficit
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Stockholders' equity					16,802,000
Cumulative Effect, Period of Adoption, Adjustment | Accumulated Deficit | ASU No. 2020-06
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Stockholders' equity							16,800,000
Cumulative Effect, Period of Adoption, Adjustment | Additional Paid-in Capital
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Stockholders' equity					$ (173,070,000)
Cumulative Effect, Period of Adoption, Adjustment | Additional Paid-in Capital | ASU No. 2020-06
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Stockholders' equity							(173,100,000)
Capitalized software development costs
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property and equipment, useful lives				2 years
United States | Long-Lived Assets | Geographic Concentration Risk
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage				76.00%	68.00%
Outside of United States | Long-Lived Assets | Geographic Concentration Risk
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage				24.00%	32.00%
Sales and marketing
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Advertising costs				$ 20,800,000	$ 21,600,000	$ 9,500,000
Initial Public Offering
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Net offering costs		$ 2,000,000
0.125% Convertible Senior Notes Due 2025
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Debt conversion option							177,200,000	$ 177,200,000
Issuance cost attributable to equity component							$ 4,100,000	$ 4,100,000
Convertible senior notes, net				$ 735,482,000	$ 575,864,000
Class A Common Stock
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Proceeds from initial public offering, net of underwriting discounts and commissions and other offering costs		$ 615,600,000
Common stock, shares authorized (in shares) | shares		2,000,000,000		2,000,000,000	2,000,000,000
Class A Common Stock | Initial Public Offering
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Common stock, shares issued (in shares) | shares		24,000,000
Common stock offering price (in dollars per share) | $ / shares		$ 27
Class A Common Stock | Underwriters
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Common stock, shares issued (in shares) | shares	3,600,000
Common stock offering price (in dollars per share) | $ / shares	$ 27
Net proceeds from common stock shares issued	$ 92,300,000
Class B Common Stock
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Common stock, shares authorized (in shares) | shares		310,000,000		310,000,000	310,000,000
Class B Common Stock | Initial Public Offering
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Convertible preferred stock converted into common stock (in shares) | shares		179,011,431
Convertible Preferred Stock
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Convertible preferred stock, shares authorized (in shares) | shares			179,814,912

Basis of Presentation and Sum_5

Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Long-lived Assets Estimated Useful Lives (Details)	12 Months Ended
	Dec. 31, 2021
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, useful life	3 years
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, useful life	4 years
Computers and equipment
Acquired Finite-Lived Intangible Assets [Line Items]
Property and equipment, useful lives	3 years
Furniture and fixtures
Acquired Finite-Lived Intangible Assets [Line Items]
Property and equipment, useful lives	5 years
Capitalized software development costs
Acquired Finite-Lived Intangible Assets [Line Items]
Property and equipment, useful lives	2 years

Marketable Securities - Summary

Marketable Securities - Summary of Available-for-sale Marketable Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Marketable Securities [Line Items]
Amortized Cost	$ 1,286,225	$ 1,291,253
Unrealized Gain	80	1,435
Unrealized Losses	(2,832)	(156)
Fair Value	1,283,473	1,292,532
Commercial debt securities
Marketable Securities [Line Items]
Amortized Cost	1,034,573	926,836
Unrealized Gain	43	1,157
Unrealized Losses	(2,564)	(143)
Fair Value	1,032,052	927,850
Certificates of deposit
Marketable Securities [Line Items]
Amortized Cost	14,574	47,214
Unrealized Gain	5	43
Unrealized Losses	(10)	(1)
Fair Value	14,569	47,256
U.S. government treasury securities
Marketable Securities [Line Items]
Amortized Cost	77,628	108,092
Unrealized Gain	18	203
Unrealized Losses	(204)	(1)
Fair Value	77,442	108,294
Commercial paper
Marketable Securities [Line Items]
Amortized Cost	151,379	209,111
Unrealized Gain	14	32
Unrealized Losses	(37)	(11)
Fair Value	151,356	$ 209,132
Non-U.S. government securities
Marketable Securities [Line Items]
Amortized Cost	8,071
Unrealized Gain	0
Unrealized Losses	(17)
Fair Value	$ 8,054

Marketable Securities - Summa_2

Marketable Securities - Summary of Fair Values of Available-for-Sale Marketable Securities, by Remaining Contractual Maturity (Details) $ in Thousands	Dec. 31, 2021USD ($)
Investments, Debt and Equity Securities [Abstract]
Due within one year	$ 783,342
Due in one year through five years	500,131
Total	$ 1,283,473

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financial Assets:
Marketable Securities:	$ 1,283,473	$ 1,292,532
Commercial paper
Financial Assets:
Marketable Securities:	151,356	209,132
Certificates of deposit
Financial Assets:
Marketable Securities:	14,569	47,256
U.S. government treasury securities
Financial Assets:
Marketable Securities:	77,442	108,294
Non-U.S. government securities
Financial Assets:
Marketable Securities:	8,054
Fair Value, Recurring
Financial Assets:
Total financial assets	1,525,044	1,499,470
Fair Value, Recurring | Commercial paper
Financial Assets:
Cash equivalents:	0	25,195
Marketable Securities:	151,356	209,132
Fair Value, Recurring | Corporate debt securities
Financial Assets:
Marketable Securities:	1,032,052	927,850
Fair Value, Recurring | Certificates of deposit
Financial Assets:
Marketable Securities:	14,569	47,256
Fair Value, Recurring | U.S. government treasury securities
Financial Assets:
Marketable Securities:	77,442	108,294
Fair Value, Recurring | Non-U.S. government securities
Financial Assets:
Marketable Securities:	8,054
Fair Value, Recurring | Money market funds
Financial Assets:
Cash equivalents:	241,571	181,743
Fair Value, Recurring | Level 1
Financial Assets:
Total financial assets	241,571	181,743
Fair Value, Recurring | Level 1 | Commercial paper
Financial Assets:
Cash equivalents:	0	0
Marketable Securities:	0	0
Fair Value, Recurring | Level 1 | Corporate debt securities
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 1 | Certificates of deposit
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 1 | U.S. government treasury securities
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 1 | Non-U.S. government securities
Financial Assets:
Marketable Securities:	0
Fair Value, Recurring | Level 1 | Money market funds
Financial Assets:
Cash equivalents:	241,571	181,743
Fair Value, Recurring | Level 2
Financial Assets:
Total financial assets	1,283,473	1,317,727
Fair Value, Recurring | Level 2 | Commercial paper
Financial Assets:
Cash equivalents:	0	25,195
Marketable Securities:	151,356	209,132
Fair Value, Recurring | Level 2 | Corporate debt securities
Financial Assets:
Marketable Securities:	1,032,052	927,850
Fair Value, Recurring | Level 2 | Certificates of deposit
Financial Assets:
Marketable Securities:	14,569	47,256
Fair Value, Recurring | Level 2 | U.S. government treasury securities
Financial Assets:
Marketable Securities:	77,442	108,294
Fair Value, Recurring | Level 2 | Non-U.S. government securities
Financial Assets:
Marketable Securities:	8,054
Fair Value, Recurring | Level 2 | Money market funds
Financial Assets:
Cash equivalents:	0	0
Fair Value, Recurring | Level 3
Financial Assets:
Total financial assets	0	0
Fair Value, Recurring | Level 3 | Commercial paper
Financial Assets:
Cash equivalents:	0	0
Marketable Securities:	0	0
Fair Value, Recurring | Level 3 | Corporate debt securities
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 3 | Certificates of deposit
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 3 | U.S. government treasury securities
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 3 | Non-U.S. government securities
Financial Assets:
Marketable Securities:	0
Fair Value, Recurring | Level 3 | Money market funds
Financial Assets:
Cash equivalents:	$ 0	$ 0

Prepaid Expenses and Other Cu_3

Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Prepaid Expense and Other Assets, Current [Abstract]
General prepaid expenses	$ 13,698	$ 8,224
Other receivables	6,768	7,836
Rent	2,092	336
Hosting	1,805	7,196
Marketing	80	32
Total prepaid expenses and other current assets	$ 24,443	$ 23,624

Property and Equipment, Net - C

Property and Equipment, Net - Components of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 130,338	$ 82,718
Less: accumulated depreciation and amortization	(55,186)	(35,521)
Total property and equipment, net	75,152	47,197
Computers and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	16,885	11,490
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	6,595	5,087
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	20,669	17,639
Capitalized software development costs
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 86,189	$ 48,502

Property and Equipment, Net - A

Property and Equipment, Net - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense	$ 18.5	$ 14.5	$ 11.6

Acquisition, Intangible Asset_3

Acquisition, Intangible Assets and Goodwill - Additional Information (Details) - USD ($) $ in Thousands	Nov. 06, 2019	Apr. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Feb. 28, 2021
Acquisition Intangible Assets And Goodwill [Line Items]
Goodwill			$ 292,176	$ 17,609
Cash consideration to acquire business			226,505	2,363	$ 2,138
Intangible amortization expense			4,400	900	$ 800
Acquisition in December 2021
Acquisition Intangible Assets And Goodwill [Line Items]
Purchase price allocated to estimated fair value of intangible assets			4,300
Goodwill			$ 36,600
Acquisition in April 2021
Acquisition Intangible Assets And Goodwill [Line Items]
Purchase price allocated to estimated fair value of intangible assets		$ 12,000
Goodwill		204,300
Purchase consideration in cash and stock to acquire business		219,400
Severance costs		1,300
Acquisition in April 2021 | Developed technology
Acquisition Intangible Assets And Goodwill [Line Items]
Purchase price allocated to estimated fair value of intangible assets		$ 8,700
Acquired finite-lived intangible assets, weighted average useful life		3 years
Acquisition in April 2021 | Customer relationships
Acquisition Intangible Assets And Goodwill [Line Items]
Purchase price allocated to estimated fair value of intangible assets		$ 3,300
Acquired finite-lived intangible assets, weighted average useful life		4 years
Acquisition in February 2021
Acquisition Intangible Assets And Goodwill [Line Items]
Purchase price allocated to estimated fair value of intangible assets						$ 1,700
Goodwill						$ 34,300
2020 Acquisition
Acquisition Intangible Assets And Goodwill [Line Items]
Purchase price allocated to estimated fair value of intangible assets				1,500
Goodwill				$ 7,800
2019 Acquisition
Acquisition Intangible Assets And Goodwill [Line Items]
Cash consideration to acquire business	$ 2,200

Acquisition, Intangible Asset_4

Acquisition, Intangible Assets and Goodwill - Schedule of Intangibles, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 20,486
Accumulated Amortization	(4,782)
Net Carrying Amount	15,704	$ 2,069
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	17,186	3,331
Accumulated Amortization	(4,182)	(1,262)
Net Carrying Amount	$ 13,004	$ 2,069
Amortization Period	3 years	3 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,300
Accumulated Amortization	(600)
Net Carrying Amount	$ 2,700
Amortization Period	4 years

Acquisition, Intangible Asset_5

Acquisition, Intangible Assets and Goodwill - Schedule of Future Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Acquisitions, Intangible Assets And Goodwill [Abstract]
2022	$ 6,507
2023	5,985
2024	2,987
2025	225
Net Carrying Amount	$ 15,704	$ 2,069

Acquisition, Intangible Asset_6

Acquisition, Intangible Assets and Goodwill - Schedule of Changes in Carrying Amount of Goodwill (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)
Goodwill [Roll Forward]
Goodwill beginning balance	$ 17,609
2021 acquisitions	275,229
Foreign currency translation adjustments	(662)
Goodwill ending balance	$ 292,176

Accrued Expenses and Other Cu_3

Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Accrued expenses	$ 50,885	$ 20,008
Accrued compensation and commissions	43,050	22,186
Other tax liability and sales tax	17,316	12,558
Early exercise liability-stock options	33	599
Total accrued expenses and other current liabilities	$ 111,284	$ 55,351

Convertible Senior Notes - Addi

Convertible Senior Notes - Additional Information (Details) $ / shares in Units, shares in Millions	Jun. 02, 2020USD ($)d	Jun. 30, 2020d	Dec. 31, 2021USD ($)$ / sharesshares	Jan. 01, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Stockholders' equity			$ 1,041,203,000		$ 957,432,000	$ 782,341,000	$ (76,041,000)
Convertible senior notes, net			735,482,000		575,864,000
Accumulated Deficit
Debt Instrument [Line Items]
Stockholders' equity			(152,106,000)		(148,163,000)	(123,616,000)	(106,906,000)
Additional Paid-in Capital
Debt Instrument [Line Items]
Stockholders' equity			1,197,136,000		1,103,305,000	$ 905,821,000	$ 30,834,000
Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Stockholders' equity					(156,268,000)
Cumulative Effect, Period of Adoption, Adjustment | Accumulated Deficit
Debt Instrument [Line Items]
Stockholders' equity					16,802,000
Cumulative Effect, Period of Adoption, Adjustment | Additional Paid-in Capital
Debt Instrument [Line Items]
Stockholders' equity					(173,070,000)
Cumulative Effect, Period of Adoption, Adjustment | ASU No. 2020-06
Debt Instrument [Line Items]
Convertible senior notes, net				$ 156,300,000
Cumulative Effect, Period of Adoption, Adjustment | ASU No. 2020-06 | Accumulated Deficit
Debt Instrument [Line Items]
Stockholders' equity				16,800,000
Cumulative Effect, Period of Adoption, Adjustment | ASU No. 2020-06 | Additional Paid-in Capital
Debt Instrument [Line Items]
Stockholders' equity				(173,100,000)
0.125% Convertible Senior Notes Due 2025
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount	$ 747,500,000		747,500,000		747,500,000
Debt instrument, interest rate	0.125%
Debt instrument, net proceeds from sale of notes	$ 730,200,000
Debt instrument, principal amount denomination used in conversion			100
Debt instrument, convertible carrying amount of equity component	177,200,000			177,200,000
Debt issuance costs	17,300,000
Issuance cost attributable to liability component	$ 13,200,000
Debt instrument, effective interest rate	5.97%
Issuance cost attributable to equity component	$ 4,100,000			$ 4,100,000
Convertible senior notes, net			735,482,000		$ 575,864,000
Debt instrument, estimated fair value			$ 1,511,500,000
Initial cap price per share of capped calls (in dollars per share) | $ / shares			$ 151.04
Cost incurred to purchase capped calls			$ 89,600,000
0.125% Convertible Senior Notes Due 2025 | Conversion, On or After March 15, 2025
Debt Instrument [Line Items]
Debt instrument, principal amount denomination used in conversion	$ 1,000
0.125% Convertible Senior Notes Due 2025 | Conversion Preceding March 15, 2025, Scenario One
Debt Instrument [Line Items]
Debt instrument, trading days | d	20
Debt instrument, threshold percentage of conversion price	130.00%
0.125% Convertible Senior Notes Due 2025 | Conversion Preceding March 15, 2025, Scenario Two
Debt Instrument [Line Items]
Debt instrument, consecutive trading days | d	10
Debt instrument, convertible, measurement period | d	5
Debt instrument, principal amount denomination used in conversion	$ 1,000
Debt instrument, convertible, threshold maximum percentage of product of last reported sale price of common stock	98.00%
0.125% Convertible Senior Notes Due 2025 | Redemption, On or After June 20, 2023, and Prior to 31st Scheduled Trading Day
Debt Instrument [Line Items]
Debt instrument redemption price percentage of principal amount redeemed	100.00%
0.125% Convertible Senior Notes Due 2025 | Class A Common Stock
Debt Instrument [Line Items]
Debt instrument, consecutive trading days	30
Common stock covered under capped calls (in shares) | shares			8.1
0.125% Convertible Senior Notes Due 2025 | Class A Common Stock | Conversion, On or After March 15, 2025
Debt Instrument [Line Items]
Debt instrument, principal amount denomination used in conversion	$ 1,000
Debt instrument, conversion price per share (in dollars per share) | $ / shares			$ 92.30
Debt instrument, conversion ratio	0.0108338
0.125% Convertible Senior Notes Due 2025 | Class A Common Stock | Redemption, On or After June 20, 2023, and Prior to 31st Scheduled Trading Day
Debt Instrument [Line Items]
Debt instrument, trading days | d	20	20
Debt instrument, consecutive trading days | d	30
0.125% Convertible Senior Notes Due 2025 | Class A Common Stock | Minimum | Redemption, On or After June 20, 2023, and Prior to 31st Scheduled Trading Day
Debt Instrument [Line Items]
Debt instrument, threshold percentage of conversion price	130.00%		130.00%

Convertible Senior Notes - Summ

Convertible Senior Notes - Summary of Net Carrying Amount of Liability Component of 2025 Notes (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Jun. 02, 2020
Debt Instrument [Line Items]
Net carrying amount	$ 735,482,000	$ 575,864,000
0.125% Convertible Senior Notes Due 2025
Debt Instrument [Line Items]
Principal	747,500,000	747,500,000	$ 747,500,000
Unamortized debt discount	0	(159,547,000)
Unamortized debt issuance costs	(12,018,000)	(12,089,000)
Net carrying amount	735,482,000	575,864,000
Equity component	$ 0	$ 173,070,000

Convertible Senior Notes - Inte

Convertible Senior Notes - Interest Expense related to 2025 Notes (Details) - 0.125% Convertible Senior Notes Due 2025 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Contractual interest expense	$ 934	$ 540
Amortization of debt discount	0	17,621
Amortization of issuance costs	3,349	1,106
Total	$ 4,283	$ 19,267

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($)	Jun. 02, 2020	Dec. 31, 2021	Dec. 31, 2020	Jan. 31, 2016	Jan. 31, 2015
Loss Contingencies [Line Items]
Non-cancelable purchase commitments		$ 688,400,000
Operating lease obligation		97,000,000
Contingent federal payroll tax liability				$ 5,400,000	$ 5,000,000
Benefit on federal payroll tax liability		5,600,000	$ 5,000,000
Matching contributions to the 401(k) plan		0	0
0.125% Convertible Senior Notes Due 2025
Loss Contingencies [Line Items]
Debt instrument, aggregate principal amount	$ 747,500,000	$ 747,500,000	$ 747,500,000
Debt instrument, net proceeds from sale of notes	730,200,000
Long-term debt, principal and future interest payments due	$ 750,800,000

Leases - Additional Information

Leases - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)lease	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Leases [Abstract]
Operating lease, renewal term	2 years
Operating lease, termination term	3 years
Rent expense	$ 23.8	$ 20.8	$ 16.7
Sublease income	$ 1	$ 1	$ 1
Number of operating lease not yet commenced | lease	4
Operating lease not yet commenced, undiscounted future payments	$ 16.1
Operating lease not yet commenced, term of contract	5 years 3 months 18 days

Leases - Summary of Components

Leases - Summary of Components of Lease Cost Recognized (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease cost	$ 20,198	$ 17,081
Short-term lease cost	3,609	3,717
Operating lease, non-cash lease expense	$ 17,200	$ 14,000

Leases - Summary of Supplementa

Leases - Summary of Supplemental Cash Flow Information and Non-cash Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Cash paid for amounts included in measurement of lease liabilities	$ 20,741	$ 15,074
Operating lease assets obtained in exchange for new lease liabilities	$ 17,476	$ 17,379

Leases - Summary of Maturities

Leases - Summary of Maturities of Lease Liabilities (Details) $ in Thousands	Dec. 31, 2021USD ($)
Leases [Abstract]
2022	$ 22,907
2023	19,127
2024	9,591
2025	7,633
2026	6,109
Thereafter	15,528
Total lease payments	80,895
Less: imputed interest	(8,633)
Present value of lease liabilities	$ 72,262

Leases - Summary of Weighted Av

Leases - Summary of Weighted Average Remaining Lease Term and Discount Rate (Details)	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Weighted average remaining lease term (years)	4 years 10 months 24 days	4 years 4 months 24 days
Weighted average discount rate	4.55%	4.71%

Revenue - Schedule of Revenue b

Revenue - Schedule of Revenue by Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Total	$ 1,028,784	$ 603,466	$ 362,780
North America
Disaggregation of Revenue [Line Items]
Total	736,218	449,899	272,190
International
Disaggregation of Revenue [Line Items]
Total	$ 292,566	$ 153,567	$ 90,590

Revenue - Additional Informatio

Revenue - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Unbilled accounts receivable	$ 44.2	$ 20.1
Allowance for doubtful accounts receivable deemed uncollectible	1.7	1.6
Revenue recognized	206.6	126.8	$ 71
Deferred contract costs	65.3	40.4
Amortization expense	$ (17.9)	$ 10.4	$ 5.4

Revenue - Revenue, Remaining Pe

Revenue - Revenue, Remaining Performance Obligation (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 815	$ 434.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, expected to recognize period	24 months

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) $ / shares in Units, $ in Thousands	1 Months Ended						12 Months Ended
	Dec. 31, 2021USD ($)classplan$ / sharesshares	Apr. 30, 2021shares	Feb. 28, 2021shares	Jun. 30, 2020shares	Nov. 30, 2019shares	Sep. 30, 2019$ / shares	Dec. 31, 2021USD ($)classplan$ / sharesshares	Dec. 31, 2020USD ($)$ / sharesshares	Dec. 31, 2019USD ($)$ / sharesshares	Sep. 23, 2019shares	Sep. 06, 2019shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock classes | class	2						2
Common stock, shares authorized (in shares)										2,330,000,000	380,000,000
Number of equity incentive plan | plan	2						2
Stock issuable upon the exercise of options outstanding (in shares)	21,372,561						21,372,561	27,068,323	36,384,767
Weighted average grant-date fair value of options granted (in dollars per share) | $ / shares								$ 16.55	$ 8.69
Proceeds from exercise of stock options | $							$ 14,907	$ 15,985	$ 7,899
Intrinsic value of options exercised | $							579,600	554,300	121,300
Aggregate fair value of options vested | $							28,100	27,600	10,800
Share-based payment arrangement, expense | $							163,737	74,374	19,034
Amounts withheld on behalf of employees for a future purchase | $							$ 245	1,040	0
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service based vesting period							4 years
Total compensation cost related to unvested awards not yet recognized | $	$ 31,600						$ 31,600	$ 60,600
Weighted average period over compensation cost related to unvested employee awards							1 year 3 months 18 days	2 years
Early exercise of common stock (in shares)	31,500						31,500	438,750
RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period over compensation cost related to unvested employee awards							3 years 1 month 6 days	3 years 4 months 24 days
Common stock granted (in shares)							5,208,252
Total compensation cost related to unvested awards and ESPP not yet recognized | $	$ 773,600						$ 773,600	$ 281,500
2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized to grant award (in shares) (up to)	54,279,321						54,279,321
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period over compensation cost related to unvested employee awards								4 months 24 days
Total compensation cost related to unvested awards and ESPP not yet recognized | $	$ 3,500						$ 3,500	$ 2,500
Share-based payment arrangement, expiration period						27 months
Percentage of purchase the shares at a price per share | $ / shares						$ 0.85
Share-based payment arrangement, expense | $							7,600	5,000	$ 1,200
Amounts withheld on behalf of employees for a future purchase | $							$ 4,200	$ 2,800
Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of voting rights entitled to stockholders per share | $ / shares	$ 1						$ 1
Common stock, shares authorized (in shares)	2,000,000,000						2,000,000,000	2,000,000,000		2,000,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.00001						$ 0.00001	$ 0.00001
Common stock, shares issued (in shares)	263,339,585						263,339,585	218,510,509
Stock issuable upon the exercise of options outstanding (in shares)	31,671						31,671	34,759
Class A Common Stock | Service-based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service based vesting period				4 years
Common stock granted (in shares)	98,593	245,761	117,538	96,210	244,445
Class A Common Stock | Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock under the Employee Stock Purchase Plan (in shares)							291,871	447,955
Number of shares available for grant (in shares)	11,989,812						11,989,812
Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of voting rights entitled to stockholders per share | $ / shares	$ 10						$ 10
Common stock, number of shares converted							38,379,141
Common stock, shares authorized (in shares)	310,000,000						310,000,000	310,000,000		310,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.00001						$ 0.00001	$ 0.00001
Common stock, shares issued (in shares)	50,025,852						50,025,852	87,369,554
Stock issuable upon the exercise of options outstanding (in shares)	21,340,890						21,340,890	27,033,564

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Reserved Shares of Common Stock for Future Issuance (Details) - shares	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved shares of common stock for future issuance (in shares)	95,722,963	84,255,358
Options and RSU's outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved shares of common stock for future issuance (in shares)	29,453,830	32,235,043
Shares available for future option and RSU grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved shares of common stock for future issuance (in shares)	54,279,321	42,797,432
Shares available subject to the 2020 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved shares of common stock for future issuance (in shares)	11,989,812	9,222,883

Stockholders' Equity - Summar_2

Stockholders' Equity - Summary of Fair Value Assumptions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility		38.90%
Expected volatility minimum			38.90%
Expected volatility maximum			39.50%
Risk-free interest rate		1.70%
Risk-free interest rate minimum			1.40%
Risk-free interest rate maximum			2.60%
Expected dividend yield		0.00%	0.00%
Expected term (in years)		6 years 1 month 6 days
Fair value of common stock (in dollars per share)		$ 41.19
Granted (in shares)	0
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)			5 years 2 months 12 days
Fair value of common stock (in dollars per share)			$ 6.16
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)			6 years 3 months 18 days
Fair value of common stock (in dollars per share)			$ 38.21

Stockholders' Equity - Summar_3

Stockholders' Equity - Summary of Stock Option Activity and Weighted Average Exercise Prices (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of Options Outstanding
Beginning balance (in shares)	27,068,323	36,384,767
Options granted (in shares)	0	14,600
Options exercised (in shares)	(5,109,688)	(8,753,274)
Options forfeited or expired (in shares)	(586,074)	(577,770)
Ending balance (in shares)	21,372,561	27,068,323	36,384,767
Exercisable (in shares)	16,682,455	16,545,562
Weighted- Average Exercise Price
Beginning balance (in dollars per share)	$ 3.31	$ 2.96
Options granted (in dollars per share)	0	41.19
Options exercised (in dollars per share)	2.92	1.83
Options forfeited or expired (in dollars per share)	6.40	4.93
Ending balance (in dollars per share)	3.31	3.31	$ 2.96
Exercisable (in dollars per share)	$ 2.07	$ 1.39
Weighted-Average Remaining Contractual Life (in Years)
Options outstanding	5 years 6 months	6 years 8 months 12 days	7 years 7 months 6 days
Exercisable	5 years	5 years 10 months 24 days
Aggregate Intrinsic Value
Balance	$ 3,735,819	$ 2,575,069	$ 1,266,938
Exercisable	$ 2,936,715	$ 1,605,723

Stockholders' Equity - Summar_4

Stockholders' Equity - Summary of Activity for Unvested RSUs (Details) - Restricted Stock Units (RSUs) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)$ / sharesshares	Dec. 31, 2020USD ($)
Shares
Unvested and outstanding balance (in shares) | shares	5,166,720
Awarded (in shares) | shares	5,208,252
Vested (in shares) | shares	(1,483,639)
Forfeited/canceled (in shares) | shares	(810,064)
Unvested and outstanding balance (in shares) | shares	8,081,269
Weighted-Average Fair Value
Unvested and outstanding balance (in dollars per share) | $ / shares	$ 59.50
Awarded (in dollars per share) | $ / shares	124.47
Vested (in dollars per share) | $ / shares	54.89
Forfeited/canceled (in dollars per share) | $ / shares	69.53
Unvested and outstanding balance (in dollars per share) | $ / shares	$ 101.21
Aggregate Intrinsic Value
Unvested and outstanding balance | $	$ 1,439,355	$ 508,612

Stockholders' Equity - Summar_5

Stockholders' Equity - Summary of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation, net of amounts capitalized	$ 163,737	$ 74,374	$ 19,034
Capitalized stock-based compensation expense	9,660	3,404	201
Total stock-based compensation expense	173,397	77,778	19,235
Cost of revenue
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation, net of amounts capitalized	4,565	1,794	582
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation, net of amounts capitalized	101,942	38,008	7,972
Sales and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation, net of amounts capitalized	35,035	20,467	5,538
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation, net of amounts capitalized	$ 22,195	$ 14,105	$ 4,942

Interest Income and Other Inc_3

Interest Income and Other Income, Net - Schedule of Interest Income and Other Income, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest and Other Income [Abstract]
Interest income	$ 21,412	$ 21,234	$ 4,110
Other income, net	374	751	86
Interest income and other income, net	$ 21,786	$ 21,985	$ 4,196

Income Taxes - Components of Lo

Income Taxes - Components of Loss before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Domestic	$ (29,617)	$ (32,033)	$ (18,330)
Foreign	11,195	9,811	2,354
Loss before income taxes	$ (18,422)	$ (22,222)	$ (15,976)

Income Taxes - Summary of Incom

Income Taxes - Summary of Income Taxes Allocated to Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Current, Federal	$ 232	$ 0	$ 0
Deferred, State	0	0	0
Federal	232	0	0
Current, State	44	124	126
Deferred, State	0	0	0
State	44	124	126
Current, Foreign	2,091	2,239	967
Deferred, Foreign	(44)	(38)	(359)
Foreign	2,047	2,201	608
Current, Total	2,367	2,363	1,093
Deferred, Total	(44)	(38)	(359)
Total	$ 2,323	$ 2,325	$ 734

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax expense	$ 2,323	$ 2,325	$ 734
U.S. federal statutory income tax rate	21.00%	21.00%	21.00%
Share based compensation deductions	$ 57,350	$ 47,032	$ 1,630
Valuation allowance	148,648	33,847
Change in valuation allowance of deferred tax assets	114,800	18,600
Net operating loss carryforwards for federal tax purposes	$ 505,400	263,200
Percentage of net operating loss carryforwards subjected to taxable income limitation	80.00%
Net operating loss carryforwards for state tax purposes	$ 342,100	177,500
Unrecognized tax benefits that would impact effective tax rate	100
Unrecognized tax benefits, income tax penalties and interest expense	$ 100	$ 400

Income Taxes - Summary of Tax R

Income Taxes - Summary of Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax expense at federal statutory rate	$ (3,868)	$ (4,667)	$ (3,355)
Nondeductible expenses	368	132	380
State taxes (net of federal benefit)	18	98	100
Net change in valuation allowance	62,173	51,892	5,043
Uncertain tax positions	(728)	17	23
US tax costs on international operations	1,478	1,818	201
Foreign taxes	424	126	92
Share based compensation deductions	(57,350)	(47,032)	(1,630)
Return to provision	(193)	(48)	(120)
Other	1	(11)	0
Total	$ 2,323	$ 2,325	$ 734

Income Taxes - Components of De

Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating losses	$ 128,263	$ 66,801
Stock-based compensation	23,669	11,820
Accrued bonus	2,438	536
Internal use software	2,220	2,153
Lease liability	14,374	12,566
Convertible senior notes - issuance costs	0	832
Fixed assets	1,654	982
Other	5,517	1,114
Total deferred tax assets	178,135	96,804
Less: valuation allowance	(148,648)	(33,847)
Deferred tax assets, net of valuation allowance	29,487	62,957
Deferred tax liabilities:
Commissions	(16,590)	(10,247)
Right of use asset	(12,815)	(11,394)
Convertible senior notes	0	(40,478)
Other	0	(800)
Total deferred tax liabilities	(29,405)	(62,919)
Deferred tax assets, net	$ 82	$ 38

Income Taxes - Summary of Chang

Income Taxes - Summary of Changes in Gross Amount of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 532	$ 920	$ 920
Increases based on tax positions during the current period		0	0
(Decreases) based on tax positions during the current period	(426)	(388)	0
Ending balance	$ 106	$ 532	$ 920

Net Loss Per Share - Schedule o

Net Loss Per Share - Schedule of Calculation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basic net loss per share:
Net loss	$ (20,745)	$ (24,547)	$ (16,710)
Weighted average shares used in calculating basic net loss per share (in shares)	309,048	300,350	139,873
Basic net loss per share (in dollars per share)	$ (0.07)	$ (0.08)	$ (0.12)
Diluted net loss per share:
Allocation of distributed loss for basic computation	$ (20,745)	$ (24,547)	$ (16,710)
Number of shares used in basic calculation (in shares)	309,048	300,350	139,873
Weighted average effect of diluted securities:
Number of shares used in diluted calculation (in shares)	309,048	300,350	139,873
Diluted net loss per share (in dollars per share)	$ (0.07)	$ (0.08)	$ (0.12)
Class A Common Stock
Basic net loss per share:
Net loss	$ (16,177)	$ (13,614)	$ (1,149)
Weighted average shares used in calculating basic net loss per share (in shares)	240,999	166,582	9,611
Basic net loss per share (in dollars per share)	$ (0.07)	$ (0.08)	$ (0.12)
Diluted net loss per share:
Allocation of distributed loss for basic computation	$ (16,177)	$ (13,614)	$ (1,149)
Reallocation of undistributed loss as a result of conversion of Class B to Class A shares	(4,568)	(10,933)	(15,561)
Allocation of undistributed loss	$ (20,745)	$ (24,547)	$ (16,710)
Number of shares used in basic calculation (in shares)	240,999	166,582	9,611
Weighted average effect of diluted securities:
Conversion of Class B to Class A common shares outstanding (in shares)	68,049	133,768	130,262
Number of shares used in diluted calculation (in shares)	309,048	300,350	139,873
Diluted net loss per share (in dollars per share)	$ (0.07)	$ (0.08)	$ (0.12)
Class B Common Stock
Basic net loss per share:
Net loss	$ (4,568)	$ (10,933)	$ (15,561)
Weighted average shares used in calculating basic net loss per share (in shares)	68,049	133,768	130,262
Basic net loss per share (in dollars per share)	$ (0.07)	$ (0.08)	$ (0.12)
Diluted net loss per share:
Allocation of distributed loss for basic computation	$ (4,568)	$ (10,933)	$ (15,561)
Reallocation of undistributed loss as a result of conversion of Class B to Class A shares		0	0
Allocation of undistributed loss	$ (4,568)	$ (10,933)	$ (15,561)
Number of shares used in basic calculation (in shares)	68,049	133,768	130,262
Weighted average effect of diluted securities:
Conversion of Class B to Class A common shares outstanding (in shares)		0	0
Number of shares used in diluted calculation (in shares)	68,049	133,768	130,262
Diluted net loss per share (in dollars per share)	$ (0.07)	$ (0.08)	$ (0.12)

Net Loss Per Share - Schedule_2

Net Loss Per Share - Schedule of Potentially Dilutive Securities not Included in Diluted Per Share Calculations (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in diluted per share calculations	38,592	33,702	38,625
Shares subject to outstanding stock options and RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in diluted per share calculations	29,454	32,235	37,032
Unvested early exercised stock options and restricted shares of common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in diluted per share calculations	946	718	1,240
Shares issuable upon conversion of the convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in diluted per share calculations	8,098	608	0
Shares Subject to the 2019 ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in diluted per share calculations	94	141	353