Amplitude (AMPL) 10-Q 9 May 24 2024 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2024	May 02, 2024
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Entity Registrant Name	AMPLITUDE, INC.
Entity Central Index Key	0001866692
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Class A Common Stock, $0.00001 par value per share
Trading Symbol	AMPL
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	DE
Entity File Number	001-40817
Entity Tax Identification Number	45-3937349
Entity Address, Address Line One	201 Third Street
Entity Address, Address Line Two	Suite 200
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94103
City Area Code	415
Local Phone Number	231-2353
Document Quarterly Report	true
Document Transition Report	false
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		88,471,438
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		33,369,488

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 265,705	$ 248,491
Marketable securities, current	50,442	73,909
Accounts receivable, net of allowance for doubtful accounts of $1,244 and $1,101 as of March 31, 2024 and December 31, 2023, respectively	36,066	29,496
Prepaid expenses and other current assets	18,671	16,624
Deferred commissions, current	13,190	11,444
Total current assets	384,074	379,964
Property and equipment, net	10,871	10,068
Intangible assets, net	295	609
Goodwill	4,073	4,073
Restricted cash, noncurrent	872	869
Deferred commissions, noncurrent	25,071	26,942
Operating lease right-of-use assets	5,939	6,856
Other noncurrent assets	6,716	4,303
Total assets	437,911	433,684
Current liabilities:
Accounts payable	14,573	3,063
Accrued expenses	26,228	26,657
Deferred revenue	102,774	102,573
Total current liabilities	143,575	132,293
Operating lease liabilities, noncurrent	2,536	3,604
Noncurrent liabilities	2,590	3,034
Total liabilities	148,701	138,931
Commitments and contingencies (Note 8)
Stockholders' equity
Preferred stock, $0.00001 par value per share; 20,000 shares authorized as of March 31, 2024 and December 31, 2023; zero shares issued and outstanding as of March 31, 2024 and December 31, 2023	0	0
Additional paid-in capital	674,313	658,463
Accumulated other comprehensive loss	(114)	(181)
Accumulated deficit	(384,990)	(363,530)
Total stockholders' equity	289,210	294,753
Total liabilities and stockholders' equity	437,911	433,684
Class A Common Stock
Stockholders' equity
Common Stock Value	1	1
Class B Common Stock
Stockholders' equity
Common Stock Value	$ 0	$ 0

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts Receivable, Allowance for Credit Loss, Current	$ 1,244	$ 1,101
Preferred Stock, Par or Stated Value Per Share	$ 0.00001	$ 0.00001
Preferred Stock, Shares Authorized	20,000	20,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Class A Common Stock
Common Stock, Par or Stated Value Per Share	$ 0.00001	$ 0.00001
Common Stock, Shares Authorized	600,000	600,000
Common Stock, Shares, Issued	88,239	85,628
Common Stock, Shares, Outstanding	88,239	85,628
Class B Common Stock
Common Stock, Par or Stated Value Per Share	$ 0.00001	$ 0.00001
Common Stock, Shares Authorized	600,000	600,000
Common Stock, Shares, Issued	33,370	34,382
Common Stock, Shares, Outstanding	33,370	34,382

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Revenue	$ 72,624	$ 66,477
Cost of revenue	18,889	19,187
Gross profit	53,735	47,290
Operating expenses:
Research and development	22,953	23,708
Sales and marketing	40,817	39,133
General and administrative	14,670	13,622
Total operating expenses	78,440	76,463
Other income (expense), net	3,671	3,138
Loss before provision for (benefit from) income taxes	(21,034)	(26,035)
Provision for (benefit from) income taxes	426	280
Net loss	$ (21,460)	$ (26,315)
Net loss per share attributable to Class A and Class B common stockholders, basic	$ (0.18)	$ (0.23)
Net loss per share attributable to Class A and Class B common stockholders, diluted	$ (0.18)	$ (0.23)
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic	120,826	114,369
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted	120,826	114,369
Other comprehensive loss
Net unrealized gains (losses) on marketable securities	$ 67	$ 272
Comprehensive loss	$ (21,393)	$ (26,043)

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member] Class A and Class B common stock	Additional Paid-in Capital	Accumulated other comprehensive loss	Accumulated Deficit
Beginning balance at Dec. 31, 2022	$ 294,969	$ 1	$ 568,889	$ (754)	$ (273,167)
Beginning balance, shares at Dec. 31, 2022		114,199,000
Stock-based compensation expense	20,409		20,409
Exercise of stock options	1,687		1,687
Exercise of stock options, shares		554,000
Vesting of early exercised stock options	198		198
Vesting of restricted stock units, shares		875,000
Repurchase of unvested stock options, shares		(46,000)
Net Income (Loss)	(26,315)				(26,315)
Other comprehensive income (loss), net	272			272
Ending balance at Mar. 31, 2023	291,220	$ 1	591,183	(482)	(299,482)
Ending balance, shares at Mar. 31, 2023		115,582,000
Beginning balance at Dec. 31, 2023	294,753	$ 1	658,463	(181)	(363,530)
Beginning balance, shares at Dec. 31, 2023		120,010,000
Stock-based compensation expense	21,765		21,765
Exercise of stock options	$ 1,794		1,794
Exercise of stock options, shares	698,858	699,000
Vesting of early exercised stock options	$ 20		20
Vesting of restricted stock units, shares		1,442,000
Tax withholding on net share settlement of restricted stock units	(7,729)		(7,729)
Tax withholding on net share settlement of restricted stock units, shares		(542,000)
Net Income (Loss)	(21,460)				(21,460)
Other comprehensive income (loss), net	67			67
Ending balance at Mar. 31, 2024	$ 289,210	$ 1	$ 674,313	$ (114)	$ (384,990)
Ending balance, shares at Mar. 31, 2024		121,609,000

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net loss	$ (21,460)	$ (26,315)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	1,450	1,349
Stock-based compensation expense	21,064	19,957
Other	(239)	(245)
Non-cash operating lease costs	985	985
Changes in operating assets and liabilities:
Accounts receivable	(6,784)	(8,145)
Prepaid expenses and other current assets	(2,208)	2,753
Deferred commissions	126	312
Other noncurrent assets	(2,909)	1,472
Accounts payable	11,347	3,122
Accrued expenses	(507)	1,043
Deferred revenue	201	(645)
Operating lease liabilities	(1,114)	(704)
Net cash provided by (used in) operating activities	(48)	(5,061)
Cash flows from investing activities:
Cash received from maturities of marketable securities	42,500	0
Purchases of marketable securities	(18,352)	0
Purchase of property and equipment	(357)	(329)
Capitalization of internal-use software costs	(733)	(448)
Net cash provided by (used in) investing activities	23,058	(777)
Cash flows from financing activities:
Proceeds from the exercise of stock options	1,794	1,687
Cash received for tax withholding obligations on equity award settlements	1,546	6,325
Cash paid for tax withholding obligations on equity award settlements	(9,133)	(5,955)
Repurchase of unvested stock options	0	(648)
Net cash provided by (used in) financing activities	(5,793)	1,409
Net increase (decrease) in cash, cash equivalents, and restricted cash	17,217	(4,429)
Cash, cash equivalents, and restricted cash at beginning of period	249,360	219,349
Cash, cash equivalents, and restricted cash at end of period	266,577	214,920
Supplemental disclosure of cash flow information:
Cash paid for income taxes	121	172
Non-cash investing and financing activities:
Purchases of property and equipment included in liabilities	248	96
Stock-based compensation capitalized as internal-use software costs	$ 701	$ 452

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ (21,460)	$ (26,315)

Insider Trading Arrangements

Insider Trading Arrangements shares in Thousands	3 Months Ended
	Mar. 31, 2024 shares
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	On March 1, 2024 , Eric Vishria , a member of our board of directors , adopted a Rule 10b5-1 trading arrangement, as Trustee to The Vishria Revocable Trust, that is intended to satisfy the affirmative defense of Rule 10b5-1(c) for the sale of up to 210,500 shares of our Class A common stock (less any shares sold pursuant to the Rule 10b5-1 trading arrangement that Mr. Vishria, as Trustee to The Vishria Revocable Trust, entered into on June 9, 2023 (the “Prior 10b5-1 Plan”)) following the expiration of the Prior 10b5-1 Plan and until April 25, 2025
Eric Vishria [Member]
Trading Arrangements, by Individual
Name	Eric Vishria
Title	member of our board of directors
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	March 1, 2024
Aggregate Available	210,500
Expiration Date	April 25, 2025

Summary of Business and Signifi

Summary of Business and Significant Accounting Policies	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
Summary of Business and Significant Accounting Policies	(1) Summary of Business and Significant Accounting Policies Description of Business Amplitude, Inc. (the “Company”) was incorporated in the state of Delaware in 2011 and is headquartered in San Francisco, California. The Company provides a Digital Analytics Platform that helps companies analyze their customer behavior within digital products. The Company delivers its application over the Internet as a subscription service using a software-as-a-service (“SaaS”) model. The Company’s arrangements with customers do not provide the customer with the right to take possession of the software supporting the cloud-based application service at any time. The Company also offers customer support related to initial implementation setup, ongoing support services, and application training. Segment Information The Company has a single operating and reportable segment. 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. Long-lived assets outside of the United States are immaterial. For information regarding the Company’s revenue by geographic area, see Note 2 below. Basis of Presentation and Principles of Consolidation The condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP” or “GAAP”) and include the accounts of Amplitude, Inc. and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The reporting currency of the Company is the United States dollar. The functional currency of the Company’s foreign subsidiaries is also the United States dollar. The unaudited condensed consolidated balance sheet as of December 31, 2023 included herein was derived from the audited financial statements as of that date, but does not include all disclosures, including certain notes required by U.S. GAAP on an annual reporting basis. In management’s opinion, the unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to state fairly the balance sheet, statements of operations and comprehensive loss, statements of stockholders’ equity, and statements of cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year or any future period. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 (the “2023 Form 10-K”). Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. These estimates are based on information available as of the date of the financial statements and may involve subjective or significant judgment by the Company; therefore, actual results could differ from the Company’s estimates. Items subject to such estimates and assumptions include, but are not limited to the: • expected period of benefit for deferred commissions; • useful lives of long-lived assets; • valuation of goodwill and intangible assets; • recognition, measurement, and valuation of deferred tax assets and income tax uncertainties; and • incremental borrowing rates used for operating leases. Concentration of Risk and Significant Customers Financial instruments that subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, marketable securities, and accounts receivable. Although the Company deposits its cash with high-quality, credit-rated financial institutions, the deposits, at times, may exceed federally insured limits. The Company has not experienced any losses on its deposits of cash and cash equivalents. No customer accounted for 10 % or more of total revenue for the three months ended March 31, 2024 and 2023 . As of the quarter ended March 31, 2024, no customer represented 10 % or more of accounts receivable. As of the year ended December 31, 2023, one customer represented 10 % of accounts receivable. Significant Accounting Policies The Company's significant accounting policies are described in the 2023 Form 10-K. There have been no significant changes to these policies that have had a material impact on the Company’s condensed consolidated financial statements and related notes for the three months ended March 31, 2024 . Recently Issued Accounting Pronouncements Income Taxes: In December 2023, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires that an entity, on an annual basis, disclose additional income tax information, primarily related to the rate reconciliation and income taxes paid. The amendment in the ASU is intended to enhance the transparency and decision usefulness of income tax disclosures. The amendments in this ASU are effective for annual periods beginning after December 15, 2024. The Company is currently evaluating the impact of the new standard on its consolidated financial statements which is expected to result in enhanced disclosures.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	3 Months Ended
	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	(2) Revenue from Contracts with Customers Deferred Revenue and Remaining Performance Obligations The amount of revenue recognized in the three months ended March 31, 2024 that was included in deferred revenue as of December 31, 2023 was $ 55.1 million . As of March 31, 2024 and December 31, 2023, unrecognized transaction price related to remaining performance obligations was $ 250.6 million and $ 239.4 million , respectively. The Company’s remaining performance obligations as of March 31, 2024 and December 31, 2023 are expected to be recognized as follows (in thousands): As of As of Less than or equal to 12 months $ 197,087 $ 188,456 Greater than 12 months 53,531 50,962 Total remaining performance obligations $ 250,618 $ 239,418 Disaggregation of Revenue The following table shows the Company’s disaggregation of revenue by geographic areas, as determined based on the address of the Company's customers (in thousands): Three Months Ended 2024 2023 United States $ 43,243 $ 40,435 International 29,381 26,042 Total revenue $ 72,624 $ 66,477 Deferred Commissions Commissions paid upon the initial acquisition of a contract are deferred and then amortized on a straight-line basis over a period of benefit, determined to be five years . The following table represents a roll forward of the Company’s deferred commissions for the three months ended March 31, 2024 and 2023 (in thousands): Three Months Ended 2024 2023 Beginning balance $ 38,386 $ 36,717 Additions to deferred commissions 3,227 2,466 Amortization of deferred commissions ( 3,352 ) ( 2,779 ) Ending balance 38,261 36,404 Deferred commissions, current portion 13,190 11,275 Deferred commissions, net of current portion 25,071 25,129 Total deferred commissions $ 38,261 $ 36,404

Balance Sheet Components

Balance Sheet Components	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Balance Sheet Components	(3) Balance Sheet Components The following tables show the Company’s financial statement details as of March 31, 2024 and December 31, 2023. Cash, Cash Equivalents and Restricted Cash The following table represents the Company's cash, cash equivalents, and restricted cash at each period end (in thousands): As of March 31, As of December 31, 2024 2023 2023 2022 Cash and cash equivalents $ 265,705 $ 214,062 $ 248,491 $ 218,494 Restricted cash, noncurrent 872 858 869 855 Total cash, cash equivalents, and restricted cash $ 266,577 $ 214,920 $ 249,360 $ 219,349 Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets consisted of the following (in thousands): As of As of 2024 2023 Prepaid hosting $ 7,031 $ 6,074 Other prepaid expenses and other assets 11,640 10,550 Total prepaid expense and other current assets $ 18,671 $ 16,624 Accrued Expenses Accrued expenses consisted of the following (in thousands): As of As of 2024 2023 Accrued hosting $ 2,737 $ 6,506 Accrued commission and bonus 7,587 6,383 Accrued payroll and employee related taxes 2,796 2,468 Accrued sales tax 406 322 2021 Employee Stock Purchase Plan withholding 2,177 1,017 Operating lease liabilities, current 4,526 4,571 Other accrued liabilities 5,999 5,390 Total accrued expenses $ 26,228 $ 26,657

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements	(4) Fair Value Measurements The following table summarizes, for financial assets measured at fair value, the respective fair value and classification by level of input within the fair value hierarchy (in thousands): As of March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Level 1: Cash equivalents (1) Money market funds $ 232,812 $ — $ — $ 232,812 Level 2: Cash equivalents (1) U.S. governmental securities 6,228 — — 6,228 Available-for-sale securities U.S. governmental securities 50,555 — ( 113 ) 50,442 Total $ 289,595 $ — $ ( 113 ) $ 289,482 As of December 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Level 1: Cash equivalents (1) Money market funds $ 211,741 $ — $ — $ 211,741 Level 2: Available-for-sale securities U.S. governmental securities 74,090 — ( 181 ) 73,909 Total $ 285,831 $ — $ ( 181 ) $ 285,650 (1) Included in “Cash and cash equivalents” in the Company’s condensed consolidated balance sheets as of March 31, 2024 and December 31, 2023, in addition to cash of $ 26.7 million and $ 36.8 million , respectively. The Company uses quoted prices in active markets for identical assets to determine the fair value of the Company's Level 1 investments. The fair value of the Company's Level 2 investments is determined using pricing based on quoted market prices or alternative market observable inputs. The fair value of the Company's available-for-sale securities as of March 31, 2024, by remaining contractual maturities, was as follows (in thousands): As of March 31, 2024 Due in one year or less $ 50,442 Due in greater than one year — Total $ 50,442

Stockholders' Equity and Equity

Stockholders' Equity and Equity Incentive Plans	3 Months Ended
	Mar. 31, 2024
Equity [Abstract]
Stockholders' Equity (Deficit) and Equity Incentive Plans	(5) Stockholders’ Equity and Equity Incentive Plans Preferred stock In connection with the direct listing of the Company’s Class A common stock on the Nasdaq Capital Market (the “Direct Listing”) on September 21, 2021, an amended and restated certificate of incorporation of the Company was filed with the Secretary of State of the State of Delaware, which authorized the issuance of 20 million shares of undesignated preferred stock with a par value of $ 0.00001 per share and rights and preferences, including voting rights, designated from time to time by the Company's board of directors. Common Stock The Company has two classes of common stock: Class A common stock and Class B common stock. The Company's amended and restated certificate of incorporation authorizes the issuance of 600 million shares of Class A common stock and 600 million shares of Class B common stock. The shares of Class A common stock and Class B common stock are identical, except with respect to voting, conversion, and transfer rights. Each share of Class A common stock is entitled to one vote . Each share of Class B common stock is entitled to five votes . Class A and Class B common stock each have a par value of $ 0.00001 per share, and are referred to as common stock throughout the notes to the condensed consolidated financial statements, unless otherwise noted. Holders of common stock are entitled to receive any dividends whenever funds are legally available and if declared by the Company's board of directors. Shares of Class B common stock may be converted to Class A common stock at any time at the option of the stockholder. Shares of Class B common stock will also automatically convert into one share of Class A common stock upon any transfer, except for certain permitted transfers described in the Company's amended and restated certificate of incorporation. In addition, each share of Class B common stock held by the Company's three cofounders (or any of such founder’s affiliates) will convert automatically into one share of Class A common stock on the earlier of: (i) the death or incapacity of such founder or (ii) the date that is six months following the date on which such founder is no longer an employee or director of the Company (unless such founder has rejoined the Company during such six-month period). Each outstanding share of the Company's Class B common stock will also convert automatically into one share of Class A common stock on the date that is six months following the date on which no founder is an employee or director of the Company (unless a founder has rejoined the Company during such six-month period). In addition, any transfer by a founder (or such founder’s affiliates) to one or more of the other founders (or such founders’ affiliates) will not result in the automatic conversion of such shares of Class B common stock to Class A common stock. Once converted into Class A common stock, the Class B common stock may not be reissued. The Company has reserved shares of its common stock as follows: As of As of 2014 Stock Option and Grant Plan and 2021 Incentive Award Plan: Equity plan stock options outstanding 13,504,931 14,268,055 RSUs outstanding 10,091,214 11,301,279 Shares available for future issuance 24,635,517 18,260,813 2021 Employee Stock Purchase Plan: Shares available for future issuance 5,280,091 4,079,994 Total reserved shares 53,511,753 47,910,141 Equity Incentive Plans 2014 Stock Option and Grant Plan In December 2014, the Company adopted its 2014 Stock Option and Grant Plan (as amended, the “2014 Plan”), pursuant to which shares of the Company’s common stock were reserved for the issuance of stock options (incentive and non-statutory), restricted stock units (“RSUs”), and restricted stock to employees, directors, and consultants under terms and provisions established by the Company's board of directors and approved by the Company’s stockholders. The 2014 Plan was terminated in September 2021 in connection with the Direct Listing but continues to govern the terms of outstanding awards that were granted prior to the termination of the 2014 Plan. No further equity awards will be granted under the 2014 Plan. With the establishment of the 2021 Incentive Award Plan (the “2021 Plan”) as further discussed below, upon the expiration, forfeiture, cancellation, or reacquisition of any shares of Class A common stock underlying outstanding stock-based awards granted under the 2014 Plan, an equal number of shares of Class A common stock will become available for grant under the 2021 Plan. 2021 Incentive Award Plan In August 2021, the Company's board of directors adopted, and its stockholders approved, the 2021 Plan, which became effective in connection with the Direct Listing. The 2021 Plan provides for the grant of incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock awards, RSU awards, performance bonus awards, performance stock units, dividend equivalent awards and other forms of equity compensation (collectively, “equity awards”). As of March 31, 2024 , a total of 24,635,517 shares of the Company's Class A common stock have been reserved for issuance under the 2021 Plan in addition to (i) any shares available for issuance under the 2014 Plan as of the effective date of the 2021 Plan, (ii) the number of shares represented by awards outstanding under the Company's 2014 Plan (“Prior Plan Awards”) that become available upon the expiration, forfeiture, cancellation, or reacquisition of any shares of Class A common stock underlying outstanding stock awards granted under the 2014 Plan, and (iii) an annual increase on the first day of each fiscal year beginning in 2022 and ending in 2031, equal to the lesser of (A) 5% of the shares of the Company's common stock outstanding (on an as-converted basis) on the last day of the immediately preceding fiscal year and (B) such smaller number of shares of stock as determined by the Company's board of directors; provided, however, that no more than 88,000,000 shares of stock may be issued upon the exercise of incentive stock options. Stock Option Awards Stock options granted under the 2014 Plan and the 2021 Plan (collectively, the “combined stock plans”) generally vest based on continued service over four years . Option activity under the Company's combined stock plans for the three months ended March 31, 2024 is set forth below: Weighted Weighted average Aggregate Outstanding average remaining intrinsic stock exercise contractual value options price life (years) (in thousands) Balances as of December 31, 2023 14,268,055 $ 4.40 6.27 $ 118,757 Granted — — Exercised ( 698,858 ) 2.57 Cancelled/forfeited ( 64,266 ) 4.93 Balances as of March 31, 2024 (1) 13,504,931 $ 4.49 6.06 $ 86,326 Exercisable as of March 31, 2024 (2) 12,191,939 $ 3.84 5.87 $ 85,786 (1) As no forfeitures are estimated due to the Company’s adoption of ASU No. 2016-09, all options are vested or expected to vest. As of March 31, 2024 , no options were outstanding that were subject to a future performance condition. (2) Exercisable shares include vested options as well as unvested shares that can be early exercised. The aggregate intrinsic values of options are calculated as the difference between the exercise price of the options and the market price for shares of the Company’s Class A common stock as of each period-end. The total intrinsic value of options exercised for the three months ended March 31, 2024 and 2023 was $ 5.8 million and $ 5.2 million , respectively. No stock options were granted in the three months ended March 31, 2024. Stock options granted during the three months ended March 31, 2023 had a weighted average grant date fair value of $ 6.84 per share. The fair value of options granted is being expensed over the vesting period of the options on a straight-line basis as the services are being provided. No tax benefits were realized from options during the periods. As of March 31, 2024, total unrecognized stock-based compensation expense related to options outstanding under the combined stock plans was $ 9.1 million . This unrecognized expense as of March 31, 2024 is expected to be recognized over the weighted average remaining vesting period of 2.16 years. As of March 31, 2024, the Company had 342,000 shares of non-employee stock options outstanding under the combined stock plans. The fair value of each option granted to employees under the 2021 Plan is estimated on the grant date using the Black-Scholes pricing model. Restricted Stock Units RSUs granted under the 2021 Plan generally vest based on continued service. RSUs granted pursuant to the 2014 Plan vest according to a service condition as well as a performance condition, through a liquidity event, including (i) a change in control of the Company or (ii) the initial public offering of the Company’s equity securities, following which the securities shall be publicly traded, which includes a direct listing. As a result of the Direct Listing, the performance condition for all RSUs granted pursuant to the 2014 Plan has been met. During the three months ended March 31, 2024 and 2023, the Company recorded $ 19.7 million and $ 16.6 million in stock-based compensation expense related to RSUs, respectively. The total fair value of RSUs vested during the three months ended March 31, 2024 and 2023 was $ 20.6 million and $ 14.4 million, respectively. As of March 31, 2024, total unrecognized stock-based compensation expense related to RSUs was $ 131.3 million . This unrecognized expense as of March 31, 2024 is expected to be recognized over the weighted average remaining vesting period of 2.03 years. As of March 31, 2024, the Company had 143,896 shares of non-employee RSUs outstanding under the combined stock plans. RSU activity during the three months ended March 31, 2024 was as follows: Restricted stock Weighted-average Balance as of December 31, 2023 11,301,279 $ 14.76 Granted 687,854 13.46 Vested ( 1,442,104 ) 15.07 Cancelled/forfeited ( 455,815 ) 17.37 Balance as of March 31, 2024 10,091,214 $ 14.52 2021 Employee Stock Purchase Plan In August 2021, the Company’s board of directors adopted, and its stockholders approved, the 2021 Employee Stock Purchase Plan (the “ESPP”), which became effective in connection with the Direct Listing. The ESPP authorizes the issuance of shares of Class A common stock pursuant to purchase rights granted to employees. As of March 31, 2024 , a total of 5,280,091 shares of the Company’s Class A common stock have been reserved for future issuance under the ESPP, in addition to any annual automatic evergreen increases in the number of shares of Class A common stock reserved for future issuance under the ESPP. The ESPP offers employees the option to purchase shares through a series of consecutive 12-month offering periods on each May 15th and November 15th (with two six-month purchase periods during each offering period). The price at which Class A common stock is purchased under the ESPP is equal to the lower of (i) 85 % of the closing trading price per share of the Company's Class A common stock on the first trading date of an offering period in which a participant is enrolled or (ii) 85 % of the closing trading price per share on the purchase date, which will occur on the last trading day of each purchase period, or such other price designated by the administrator. The ESPP offers a rollover feature pursuant to which, if the fair market value of a share of Class A common stock on the first purchase date is lower than the fair market value on the first trading day of the offering period, the respective offering period will terminate and each participant will be automatically enrolled in the offering period that commences immediately following the purchase date. As of March 31, 2024, 0.8 million shares have been purchased under the ESPP. During the three months ended March 31, 2024 and 2023, the Company recognized $ 0.4 million and $ 0.6 million of stock-based compensation expense related to the ESPP, respectively. As of March 31, 2024, total unrecognized compensation cost related to the ESPP was $ 0.4 million , which will be amortized over a weighted average period of 0.38 years. Stock-based compensation expense, net of actual forfeitures is reflected in the condensed consolidated statements of operations and comprehensive loss (in thousands): Three Months Ended 2024 2023 Cost of revenue $ 1,474 $ 1,792 Research and development 8,914 8,579 Sales and marketing 6,871 6,368 General and administrative 3,805 3,218 Total stock-based compensation expense $ 21,064 $ 19,957

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	(6) Income Taxes The Company had an effective tax rate of ( 2.0 )% and ( 1.1 )% for the three months ended March 31, 2024 and 2023, respectively. The Company continues to incur U.S. operating losses and has minimal profits in its foreign jurisdictions. During the three months ended March 31, 2024 and 2023 , the Company evaluated all available evidence, both positive and negative, including historical levels of income, and expectations and risks associated with estimates of future taxable income, and 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 continues to maintain a full valuation allowance against its net deferred tax assets within the United States.

Operating Leases

Operating Leases	3 Months Ended
	Mar. 31, 2024
Leases [Abstract]
Operating Leases	(7) Operating Leases Supplemental cash flow information related to operating leases was as follows (in thousands): Three Months Ended 2024 Right-of-use assets obtained in exchange for new operating lease liabilities $ — Cash paid for operating lease liabilities $ 1,114 Future minimum lease payments under non-cancellable operating leases with initial lease terms in excess of one year included in the Company’s lease liabilities as of March 31, 2024 were as follows (in thousands): Year ending December 31: Remainder of 2024 3,497 2025 3,358 2026 387 2027 — 2028 and thereafter — Total undiscounted operating lease payments $ 7,242 Less: imputed interest ( 180 ) Total operating lease liabilities $ 7,062

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	(8) Commitments and Contingencies Legal Matters On February 14, 2024, a putative securities class action captioned Fagan v. Amplitude, Inc., et al., Case No. 3:24-cv-00898 (the “Class Action”) was filed in the United States District Court for the Northern District of California, naming the Company, its Chief Executive Officer, and its former Chief Financial Officer as defendants. The lawsuit is purportedly brought on behalf of all those who purchased or acquired the Company’s common stock between September 21, 2021 and February 16, 2022. The complaint alleges claims under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended, based on allegedly false or misleading statements related to the Company’s business and financial outlook. The lawsuit seeks unspecified damages and other relief. The defendants deny the allegations of wrongdoing and intend to vigorously defend against the claims in the Class Action. The Company has received, and may in the future continue to receive, claims from third parties asserting, among other things, infringement of their intellectual property rights. Future litigation may be necessary to defend the Company, its partners and its customers by determining the scope, enforceability and validity of third-party proprietary rights, or to establish its proprietary rights. In addition to the matters discussed above, from time to time, the Company is party to litigation and other legal proceedings in the ordinary course of business. While the Company does not believe the ultimate resolution of pending legal matters is likely to have a material adverse effect on its financial position, the results of any litigation or other legal proceedings are uncertain and as such the resolution of such legal proceedings, either individually or in the aggregate, could have a material adverse effect on its business, results of operations, financial condition or cash flows. The Company records litigation accruals for legal matters, which are both probable and estimable. For legal proceedings for which there is a reasonable possibility of loss (meaning those losses for which the likelihood is more than remote but less than probable), the Company has determined that it does not have material exposure, or it is unable to develop a range of reasonably possible losses. Although no assurance may be given, the Company believes that it is not presently a party to any litigation of which the outcome, if determined adversely, would individually or in the aggregate be reasonably expected to have a material and adverse effect on the business, operating results, cash flows, or financial position. Legal fees are expensed in the period in which they are incurred.

Net Loss Per Share

Net Loss Per Share	3 Months Ended
	Mar. 31, 2024
Earnings Per Share [Abstract]
Net Loss Per Share	(9) Net Loss Per Share Basic net loss per share attributable to the Company’s common stockholders is computed in conformity with the two-class method required for participating securities. The rights, including the liquidation and dividend rights, of the holders of Class A and Class B common stock are identical, except with respect to voting, conversion, and transfer rights. As the liquidation and dividend rights are identical, all undistributed earnings are allocated on a proportionate basis to each class of common stock and the resulting basic and diluted net loss per share attributable to common stockholders are, therefore, the same for both Class A and Class B common stock on both an individual and a combined basis. Basic net loss per share is computed by dividing the net loss attributable to the Company’s common stockholders by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is the same as basic net loss per share for all periods presented because the effects of potentially dilutive items were anti-dilutive given the Company’s net loss position in each period presented. The following table presents the calculation of basic and diluted net loss per share (in thousands, except per share data): Three Months Ended 2024 2023 Net loss attributable to Class A and Class B common stockholders $ ( 21,460 ) $ ( 26,315 ) Weighted-average shares used in computing net loss per share 120,826 114,369 Net loss per share attributable to Class A and Class B $ ( 0.18 ) $ ( 0.23 ) The following potential shares of common stock were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented (in thousands): As of March 31, 2024 2023 Equity plan stock options outstanding 13,505 16,170 Equity plan stock options early exercised — 138 RSUs outstanding 10,091 10,636 Restricted shares — 210 Shares issuable pursuant to the ESPP 374 551 Total 23,970 27,705

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2024
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In April 2024, the Company issued 5.4 million RSUs to its employees with service-based vesting conditions. The service-based vesting condition for these awards are satisfied over three years . The grant date fair value of the RSUs issued in April 2024 was approximately $ 52.3 million

Summary of Business and Signi_2

Summary of Business and Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
Description of Business	Description of Business Amplitude, Inc. (the “Company”) was incorporated in the state of Delaware in 2011 and is headquartered in San Francisco, California. The Company provides a Digital Analytics Platform that helps companies analyze their customer behavior within digital products. The Company delivers its application over the Internet as a subscription service using a software-as-a-service (“SaaS”) model. The Company’s arrangements with customers do not provide the customer with the right to take possession of the software supporting the cloud-based application service at any time. The Company also offers customer support related to initial implementation setup, ongoing support services, and application training.
Segment Information	Segment Information The Company has a single operating and reportable segment. 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. Long-lived assets outside of the United States are immaterial. For information regarding the Company’s revenue by geographic area, see Note 2 below.
Basis of Presentation and Principles of Consolidation	Basis of Presentation and Principles of Consolidation The condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP” or “GAAP”) and include the accounts of Amplitude, Inc. and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The reporting currency of the Company is the United States dollar. The functional currency of the Company’s foreign subsidiaries is also the United States dollar. The unaudited condensed consolidated balance sheet as of December 31, 2023 included herein was derived from the audited financial statements as of that date, but does not include all disclosures, including certain notes required by U.S. GAAP on an annual reporting basis. In management’s opinion, the unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to state fairly the balance sheet, statements of operations and comprehensive loss, statements of stockholders’ equity, and statements of cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year or any future period. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 (the “2023 Form 10-K”).
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. These estimates are based on information available as of the date of the financial statements and may involve subjective or significant judgment by the Company; therefore, actual results could differ from the Company’s estimates. Items subject to such estimates and assumptions include, but are not limited to the: • expected period of benefit for deferred commissions; • useful lives of long-lived assets; • valuation of goodwill and intangible assets; • recognition, measurement, and valuation of deferred tax assets and income tax uncertainties; and • incremental borrowing rates used for operating leases.
Concentration of Risk and Significant Customers	Concentration of Risk and Significant Customers Financial instruments that subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, marketable securities, and accounts receivable. Although the Company deposits its cash with high-quality, credit-rated financial institutions, the deposits, at times, may exceed federally insured limits. The Company has not experienced any losses on its deposits of cash and cash equivalents. No customer accounted for 10 % or more of total revenue for the three months ended March 31, 2024 and 2023 . As of the quarter ended March 31, 2024, no customer represented 10 % or more of accounts receivable. As of the year ended December 31, 2023, one customer represented 10 % of accounts receivable. Significant Accounting Policies The Company's significant accounting policies are described in the 2023 Form 10-K. There have been no significant changes to these policies that have had a material impact on the Company’s condensed consolidated financial statements and related notes for the three months ended March 31, 2024 .
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Income Taxes: In December 2023, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires that an entity, on an annual basis, disclose additional income tax information, primarily related to the rate reconciliation and income taxes paid. The amendment in the ASU is intended to enhance the transparency and decision usefulness of income tax disclosures. The amendments in this ASU are effective for annual periods beginning after December 15, 2024. The Company is currently evaluating the impact of the new standard on its consolidated financial statements which is expected to result in enhanced disclosures.

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	3 Months Ended
	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Summary of Remaining Performance Obligations	The Company’s remaining performance obligations as of March 31, 2024 and December 31, 2023 are expected to be recognized as follows (in thousands): As of As of Less than or equal to 12 months $ 197,087 $ 188,456 Greater than 12 months 53,531 50,962 Total remaining performance obligations $ 250,618 $ 239,418
Summary of Disaggregation of Revenue by Geographic Areas	The following table shows the Company’s disaggregation of revenue by geographic areas, as determined based on the address of the Company's customers (in thousands): Three Months Ended 2024 2023 United States $ 43,243 $ 40,435 International 29,381 26,042 Total revenue $ 72,624 $ 66,477
Summary of Deferred Commissions	The following table represents a roll forward of the Company’s deferred commissions for the three months ended March 31, 2024 and 2023 (in thousands): Three Months Ended 2024 2023 Beginning balance $ 38,386 $ 36,717 Additions to deferred commissions 3,227 2,466 Amortization of deferred commissions ( 3,352 ) ( 2,779 ) Ending balance 38,261 36,404 Deferred commissions, current portion 13,190 11,275 Deferred commissions, net of current portion 25,071 25,129 Total deferred commissions $ 38,261 $ 36,404

Balance Sheet Components (Table

Balance Sheet Components (Tables)	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Cash, Cash Equivalents, and Restricted Cash	The following table represents the Company's cash, cash equivalents, and restricted cash at each period end (in thousands): As of March 31, As of December 31, 2024 2023 2023 2022 Cash and cash equivalents $ 265,705 $ 214,062 $ 248,491 $ 218,494 Restricted cash, noncurrent 872 858 869 855 Total cash, cash equivalents, and restricted cash $ 266,577 $ 214,920 $ 249,360 $ 219,349
Schedule of Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets consisted of the following (in thousands): As of As of 2024 2023 Prepaid hosting $ 7,031 $ 6,074 Other prepaid expenses and other assets 11,640 10,550 Total prepaid expense and other current assets $ 18,671 $ 16,624
Schedule of Accrued Expenses	Accrued expenses consisted of the following (in thousands): As of As of 2024 2023 Accrued hosting $ 2,737 $ 6,506 Accrued commission and bonus 7,587 6,383 Accrued payroll and employee related taxes 2,796 2,468 Accrued sales tax 406 322 2021 Employee Stock Purchase Plan withholding 2,177 1,017 Operating lease liabilities, current 4,526 4,571 Other accrued liabilities 5,999 5,390 Total accrued expenses $ 26,228 $ 26,657

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Summarizes of fair value assets	The following table summarizes, for financial assets measured at fair value, the respective fair value and classification by level of input within the fair value hierarchy (in thousands): As of March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Level 1: Cash equivalents (1) Money market funds $ 232,812 $ — $ — $ 232,812 Level 2: Cash equivalents (1) U.S. governmental securities 6,228 — — 6,228 Available-for-sale securities U.S. governmental securities 50,555 — ( 113 ) 50,442 Total $ 289,595 $ — $ ( 113 ) $ 289,482 As of December 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Level 1: Cash equivalents (1) Money market funds $ 211,741 $ — $ — $ 211,741 Level 2: Available-for-sale securities U.S. governmental securities 74,090 — ( 181 ) 73,909 Total $ 285,831 $ — $ ( 181 ) $ 285,650 (1) Included in “Cash and cash equivalents” in the Company’s condensed consolidated balance sheets as of March 31, 2024 and December 31, 2023, in addition to cash of $ 26.7 million and $ 36.8 million , respectively.
Contractual maturities of available-for-sale securities	The fair value of the Company's available-for-sale securities as of March 31, 2024, by remaining contractual maturities, was as follows (in thousands): As of March 31, 2024 Due in one year or less $ 50,442 Due in greater than one year — Total $ 50,442

Stockholders' Equity and Equi_2

Stockholders' Equity and Equity Incentive Plans (Tables)	3 Months Ended
	Mar. 31, 2024
Equity [Abstract]
Schedule of Reserved Shares of Common Stock	The Company has reserved shares of its common stock as follows: As of As of 2014 Stock Option and Grant Plan and 2021 Incentive Award Plan: Equity plan stock options outstanding 13,504,931 14,268,055 RSUs outstanding 10,091,214 11,301,279 Shares available for future issuance 24,635,517 18,260,813 2021 Employee Stock Purchase Plan: Shares available for future issuance 5,280,091 4,079,994 Total reserved shares 53,511,753 47,910,141
Summary of Stock Option Activity	Option activity under the Company's combined stock plans for the three months ended March 31, 2024 is set forth below: Weighted Weighted average Aggregate Outstanding average remaining intrinsic stock exercise contractual value options price life (years) (in thousands) Balances as of December 31, 2023 14,268,055 $ 4.40 6.27 $ 118,757 Granted — — Exercised ( 698,858 ) 2.57 Cancelled/forfeited ( 64,266 ) 4.93 Balances as of March 31, 2024 (1) 13,504,931 $ 4.49 6.06 $ 86,326 Exercisable as of March 31, 2024 (2) 12,191,939 $ 3.84 5.87 $ 85,786 (1) As no forfeitures are estimated due to the Company’s adoption of ASU No. 2016-09, all options are vested or expected to vest. As of March 31, 2024 , no options were outstanding that were subject to a future performance condition. (2) Exercisable shares include vested options as well as unvested shares that can be early exercised.
Schedule of RSU Activity	RSU activity during the three months ended March 31, 2024 was as follows: Restricted stock Weighted-average Balance as of December 31, 2023 11,301,279 $ 14.76 Granted 687,854 13.46 Vested ( 1,442,104 ) 15.07 Cancelled/forfeited ( 455,815 ) 17.37 Balance as of March 31, 2024 10,091,214 $ 14.52
Schedule of Stock-based Compensation Expense	Stock-based compensation expense, net of actual forfeitures is reflected in the condensed consolidated statements of operations and comprehensive loss (in thousands): Three Months Ended 2024 2023 Cost of revenue $ 1,474 $ 1,792 Research and development 8,914 8,579 Sales and marketing 6,871 6,368 General and administrative 3,805 3,218 Total stock-based compensation expense $ 21,064 $ 19,957

Operating Leases (Tables)

Operating Leases (Tables)	3 Months Ended
	Mar. 31, 2024
Leases [Abstract]
Summary of Supplemental Cash Flow Information	Supplemental cash flow information related to operating leases was as follows (in thousands): Three Months Ended 2024 Right-of-use assets obtained in exchange for new operating lease liabilities $ — Cash paid for operating lease liabilities $ 1,114
Schedule of Operating Lease, Liability, Maturity	Future minimum lease payments under non-cancellable operating leases with initial lease terms in excess of one year included in the Company’s lease liabilities as of March 31, 2024 were as follows (in thousands): Year ending December 31: Remainder of 2024 3,497 2025 3,358 2026 387 2027 — 2028 and thereafter — Total undiscounted operating lease payments $ 7,242 Less: imputed interest ( 180 ) Total operating lease liabilities $ 7,062

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	3 Months Ended
	Mar. 31, 2024
Earnings Per Share [Abstract]
Schedule 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): Three Months Ended 2024 2023 Net loss attributable to Class A and Class B common stockholders $ ( 21,460 ) $ ( 26,315 ) Weighted-average shares used in computing net loss per share 120,826 114,369 Net loss per share attributable to Class A and Class B $ ( 0.18 ) $ ( 0.23 )
Schedule of Ant-dilutive Securities Excluded from Calculation of Diluted Net Loss Per Share	The following potential shares of common stock were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented (in thousands): As of March 31, 2024 2023 Equity plan stock options outstanding 13,505 16,170 Equity plan stock options early exercised — 138 RSUs outstanding 10,091 10,636 Restricted shares — 210 Shares issuable pursuant to the ESPP 374 551 Total 23,970 27,705

Summary of Business and Signi_3

Summary of Business and Significant Accounting Policies - Additional Information (Details) - Segment	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable Impaired [Line Items]
Operating segment	1
Reportable segment	1
Accounts receivable.	10%		10%
Revenue | Revenue Benchmark | No Customer
Financing Receivable Impaired [Line Items]
Concentration Risk, Percentage	10%	10%

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Impaired [Line Items]
Deferred revenue	$ 55.1
Unrecognized transaction price	$ 250.6	$ 239.4
Deferred commission amortization period	5 years

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Summary of Remaining Performance Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Less than or equal to 12 months	$ 197,087	$ 188,456
Greater than 12 months	53,531	50,962
Total remaining performance obligations	$ 250,618	$ 239,418

Revenue from Contracts with C_5

Revenue from Contracts with Customers - Summary of Disaggregation of Revenue by Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Financing Receivable Impaired [Line Items]
Total revenue	$ 72,624	$ 66,477
United States
Financing Receivable Impaired [Line Items]
Total revenue	43,243	40,435
International
Financing Receivable Impaired [Line Items]
Total revenue	$ 29,381	$ 26,042

Revenue from Contracts with C_6

Revenue from Contracts with Customers - Summary of Deferred Commissions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue from Contract with Customer [Abstract]
Beginning balance	$ 38,386	$ 36,717
Additions to deferred commissions	3,227	2,466
Amortization of deferred commissions	(3,352)	(2,779)
Ending balance	38,261	36,404
Deferred commissions, current portion	13,190	11,275
Deferred commissions, net of current portion	25,071	25,129
Total deferred commission	$ 38,261	$ 36,404

Balance Sheet Components - Sche

Balance Sheet Components - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 265,705	$ 248,491	$ 214,062	$ 218,494
Restricted cash, noncurrent	872	869	858	855
Total cash, cash equivalents, and restricted cash	$ 266,577	$ 249,360	$ 214,920	$ 219,349

Balance Sheet Components - Sc_2

Balance Sheet Components - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaid hosting	$ 7,031	$ 6,074
Other prepaid expenses and other assets	11,640	10,550
Total prepaid expense and other current assets	$ 18,671	$ 16,624

Balance Sheet Components - Sc_3

Balance Sheet Components - Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued hosting	$ 2,737	$ 6,506
Accrued commission and bonus	7,587	6,383
Accrued payroll and employee related taxes	2,796	2,468
Accrued sales tax	406	322
2021 Employee Stock Purchase Plan withholding	2,177	1,017
Operating lease liabilities, current	4,526	4,571
Other accrued liabilities	5,999	5,390
Total accrued expenses	$ 26,228	$ 26,657

Fair Value Measurements - Summa

Fair Value Measurements - Summarizes of Assets Fair Value measured (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost		$ 289,595	$ 285,831
Gross Unrealized Gains		0	0
Gross Unrealized Losses		(113)	(181)
Estimated Fair Value		289,482	285,650
Fair Value Level 1 | Money market funds | Cash Equivalents [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost	[1]	232,812	211,741
Gross Unrealized Gains	[1]	0	0
Gross Unrealized Losses	[1]	0	0
Estimated Fair Value	[1]	232,812	211,741
Fair Value Level 2 | U.S. governmental securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost		50,555	74,090
Gross Unrealized Gains		0	0
Gross Unrealized Losses		(113)	(181)
Estimated Fair Value		50,442	$ 73,909
Fair Value Level 2 | U.S. governmental securities | Cash Equivalents [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost	[1]	6,228
Gross Unrealized Gains	[1]	0
Gross Unrealized Losses	[1]	0
Estimated Fair Value	[1]	$ 6,228
[1] Included in “Cash and cash equivalents” in the Company’s condensed consolidated balance sheets as of March 31, 2024 and December 31, 2023, in addition to cash of $ 26.7 million and $ 36.8 million , respectively.

Fair Value Measurements - Sum_2

Fair Value Measurements - Summarizes of Fair Value Assets (Parenthetical) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Cash and cash equivalents	$ 26.7	$ 36.8

Fair Value Measurements - Contr

Fair Value Measurements - Contractual Maturities Available-for-sale Securities (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Fair Value Disclosures [Abstract]
Due in one year or less	$ 50,442
Due in greater than one year	0
Total	$ 50,442

Stockholders' Equity and Equi_3

Stockholders' Equity and Equity Incentive Plans - Preferred and Common Stock - Additional Information (Details) - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Class Of Stock [Line Items]
Preferred Stock, Shares Authorized	20,000	20,000
Preferred Stock, Par or Stated Value Per Share	$ 0.00001	$ 0.00001
Class A Common Stock
Class Of Stock [Line Items]
Common Stock, Shares Authorized	600,000	600,000
Common Stock, Par or Stated Value Per Share	$ 0.00001	$ 0.00001
Common stock, voting rights	Each share of Class A common stock is entitled to one vote
Class B Common Stock
Class Of Stock [Line Items]
Common Stock, Shares Authorized	600,000	600,000
Common Stock, Par or Stated Value Per Share	$ 0.00001	$ 0.00001
Common stock, voting rights	Each share of Class B common stock is entitled to five votes

Stockholders' Equity and Equi_4

Stockholders' Equity and Equity Incentive Plans - Schedule of Reserved Shares of Common Stock (Details) - shares	Mar. 31, 2024	Dec. 31, 2023
Class Of Stock [Line Items]
Total reserved shares	53,511,753	47,910,141
Employee Stock Option | Option and Grant Plan
Class Of Stock [Line Items]
Total reserved shares	24,635,517	18,260,813
Equity Plan Stock Options Outstanding
Class Of Stock [Line Items]
Total reserved shares	13,504,931	14,268,055
RSUs Outstanding
Class Of Stock [Line Items]
Total reserved shares	10,091,214	11,301,279
2021 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Total reserved shares	5,280,091	4,079,994

Stockholders' Equity and Equi_5

Stockholders' Equity and Equity Incentive Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Class Of Stock [Line Items]
Exercise of stock options, shares	698,858
Total stock-based compensation expense	$ 21,064	$ 19,957
Employee Stock Option
Class Of Stock [Line Items]
Intrinsic value	5,800	$ 5,200
Weighted-average grant date fair value		$ 6.84
R S Us
Class Of Stock [Line Items]
Total stock-based compensation expense	19,700	$ 16,600
Fair value shares vested	20,600	14,400
2014 Stock Option Plan
Class Of Stock [Line Items]
Unrecognized share-based compensation expense	$ 9,100
Unrecognized share-based compensation expense recognition period (term)	2 years 1 month 28 days
Non-employee stock options outstanding	342,000
2014 Stock Option Plan | R S Us
Class Of Stock [Line Items]
Unrecognized share-based compensation expense	$ 131,300
Unrecognized share-based compensation expense recognition period (term)	2 years 10 days
Non-employee stock options outstanding	143,896
2021 Incentive Award Plan
Class Of Stock [Line Items]
Exercise of stock options, shares	88,000,000
Purchase price	85%
Options, vesting period	4 years
2021 Incentive Award Plan | Class A Common Stock
Class Of Stock [Line Items]
Shares reserved for issuance	24,635,517
Purchase price	85%
2021 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Exercise of stock options, shares	800,000
Total stock-based compensation expense	$ 400
Unrecognized stock-based compensation expense	$ 400	$ 600
weighted-average remaining vesting period	4 months 17 days
2021 Employee Stock Purchase Plan | Class A Common Stock
Class Of Stock [Line Items]
Shares reserved for issuance	5,280,091

Stockholders' Equity and Equi_6

Stockholders' Equity and Equity Incentive Plans - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2024		Dec. 31, 2023
Equity [Abstract]
Balance as of December 31, 2023		14,268,055
Granted		0
Exercised		(698,858)
Cancelled/forfeited		(64,266)
Balance as of March 31, 2024		13,504,931	[1]	14,268,055
Balance as of March 31, 2024	[2]	12,191,939
Balances as of December 31, 2023		$ 4.4
Granted		0
Exercised		2.57
Cancelled/forfeited		4.93
Balance as of March 31, 2024		4.49	[1]	$ 4.4
Exercisable as of Balance as of March 31, 2024	[2]	$ 3.84
Weighted average remaining contractual life (years), outstanding		6 years 21 days	[1]	6 years 3 months 7 days
Weighted average remaining contractual life (years), Exercisable	[2]	5 years 10 months 13 days
Balances as of December 31, 2023		$ 118,757
Balance as of March 31, 2024		86,326	[1]	$ 118,757
Exercisable as of March 31, 2024	[2]	$ 85,786
[1] As no forfeitures are estimated due to the Company’s adoption of ASU No. 2016-09, all options are vested or expected to vest. As of March 31, 2024 , no options were outstanding that were subject to a future performance condition. Exercisable shares include vested options as well as unvested shares that can be early exercised.

Stockholders' Equity and Equi_7

Stockholders' Equity and Equity Incentive Plans - Schedule of RSU Activity (Details) - RSUs Outstanding	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Class Of Stock [Line Items]
Balance as of December 31, 2023 | shares	11,301,279
Granted | shares	687,854
Vested | shares	(1,442,104)
Cancelled/forfeited | shares	(455,815)
Balance as of March 31, 2024 | shares	10,091,214
Balance as of December 31, 2023 | $ / shares	$ 14.76
Granted | $ / shares	13.46
Vested | $ / shares	15.07
Cancelled/forfeited | $ / shares	17.37
Balance as of March 31, 2024 | $ / shares	$ 14.52

Stockholders' Equity and Equi_8

Stockholders' Equity and Equity Incentive Plans - Schedule of Stock Based Compensation Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Class Of Stock [Line Items]
Total stock-based compensation expense	$ 21,064	$ 19,957
Cost of Revenue [Member]
Class Of Stock [Line Items]
Total stock-based compensation expense	1,474	1,792
Research and Development [Member]
Class Of Stock [Line Items]
Total stock-based compensation expense	8,914	8,579
Sales and Marketing [Member]
Class Of Stock [Line Items]
Total stock-based compensation expense	6,871	6,368
General and Administrative [Member]
Class Of Stock [Line Items]
Total stock-based compensation expense	$ 3,805	$ 3,218

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Effective tax rate	(2.00%)	(1.10%)

Operating Leases - Summary of S

Operating Leases - Summary of Supplemental Cash Flow Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Leases [Abstract]
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 0
Cash paid for operating lease liabilities	$ 1,114

Operating Leases - Schedule of

Operating Leases - Schedule of Operating Lease, Liability, Maturity (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Leases [Abstract]
Remainder of 2024	$ 3,497
2025	3,358
2026	387
2027	0
2028 and thereafter	0
Total undiscounted operating lease payments	7,242
Less: imputed interest	(180)
Total operating lease liabilities	$ 7,062

Net Loss Per Share - Schedule o

Net Loss Per Share - Schedule of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net loss attributable to Class A and Class B common stockholders	$ (21,460)	$ (26,315)
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic	120,826	114,369
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted	120,826	114,369
Net loss per share attributable to Class A and Class B common stockholders, basic	$ (0.18)	$ (0.23)
Net loss per share attributable to Class A and Class B common stockholders, diluted	$ (0.18)	$ (0.23)

Net Loss Per Share - Schedule_2

Net Loss Per Share - Schedule of Ant-dilutive Securities Excluded from Calculation of Diluted Net Loss Per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from computation of diluted net loss per share	23,970	27,705
Equity Plan Stock Options Outstanding
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from computation of diluted net loss per share	13,505	16,170
Equity Plan Stock Options Early Exercised
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from computation of diluted net loss per share	0	138
Restricted Stock Units Outstanding
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from computation of diluted net loss per share	10,091	10,636
Restricted Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from computation of diluted net loss per share	0	210
Shares issuable pursuant to the ESPP
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from computation of diluted net loss per share	374	551

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2024	Mar. 31, 2024
Subsequent Event [Line Items]
Issuance of shares to employees with service based vesting conditions		0
RSUs Outstanding | Subsequent Event
Subsequent Event [Line Items]
Issuance of shares to employees, grant date fair value	$ 52.3
Issuance of shares to employees with service based vesting conditions	5,400,000
RSUs Outstanding | Maximum | Subsequent Event
Subsequent Event [Line Items]
Vesting period of units issued	3 years