Basis of Presentation, Principles of Consolidation, and Summary of Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Principles of Consolidation	The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information. Accordingly, certain information and disclosures normally included in consolidated financial statements presented in accordance with U.S. GAAP have been condensed or omitted. The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. The accompanying condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in the Company’s final prospectus filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended, on May 26, 2021 (the “Prospectus”). The consolidated balance sheet as of December 31, 2020 has been derived from our audited consolidated financial statements. In the opinion of the Company’s management, the accompanying unaudited condensed consolidated financial statements include all adjustments (consisting of normal recurring adjustments) necessary for the fair statement of the condensed consolidated financial statements. There have been no changes in the Company’s accounting policies from those disclosed in its audited consolidated financial statements and the related notes included in the Prospectus. The operating results for the three and six months ended June 30, 2021 are not necessarily indicative of the results expected for the full year ending December 31, 2021 or any future period.
Use of Estimates	The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements, and the reported amounts of revenue and expenses during the reporting period. Significant estimates include revenue recognition, estimates relating to the measurement of operating lease right-of-use (“ROU”) assets and operating lease liabilities, determination of the fair value of stock-based awards, valuation of common stock in periods prior to becoming a public company, collectability of accounts receivable, impairment of long-lived assets, including goodwill, carrying value and useful lives of property and equipment and internal-use software, the amortization period for deferred commission costs, and income taxes. By their nature, estimates are subject to an inherent degree of uncertainty and actual results could differ from those estimates. The impact of the Coronavirus pandemic (“COVID-19”) continues to evolve. As a result, many of the Company’s estimates and assumptions require increased judgment and carry a higher degree of variability and volatility. As of the date these condensed consolidated financial statements are issued, the Company is not aware of any specific event or circumstance that would require an update to the Company’s estimates or judgments, or change to the carrying value of the Company’s assets or liabilities. However, these estimates and judgments may change as new events occur and additional information is obtained, which may result in changes being recognized in the consolidated financial statements in future periods. Actual results could differ from those estimates and any such differences may have a material impact on the financial statements.
Fair Value Measurements	Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. Accounting standards describe a fair value hierarchy based on the following three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value: - Level 1 — Quoted prices in active markets for identical assets, liabilities, or funds. - Level 2 — Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. - Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The carrying amounts of the Company’s financial instruments, including accounts receivable, accounts payable, and accrued expenses approximate fair value because of their short-term maturities. The fair value of the Company’s convertible notes with related parties as of December 31, 2020 was estimated to be approximately $36.9 million, and was based on the value of shares into which the notes convert. The value of the shares represents a Level 3 input in the fair value hierarchy. The convertible notes with related parties converted into shares of Class B common stock in connection with the Direct Listing in May 2021. Certain assets, including goodwill and intangible assets are also subject to measurement at fair value on a non-recurring basis using Level 3 inputs, but only when they are deemed to be impaired. As of June 30, 2021 and December 31, 2020, no impairments were identified on those assets required to be measured at fair value on a non-recurring basis.
Segments and Geographic Information	The Company operates as a single operating segment. The Company’s Chief Operating Decision Maker (“CODM”), the Chief Executive Officer, regularly reviews financial information presented on a consolidated basis for purposes of assessing financial performance and allocating resources.
Stock-based Compensation for Awards with a Market Condition	In April 2021, the Company granted a RSU award (the “CEO Performance Award”), which included service, market, and performance based vesting conditions. The fair value of the award is determined using a Monte Carlo simulation model. The associated stock-based compensation is recorded over the requisite service period, using a graded attribution method. The requisite service period is the longer of the service period derived from the Monte Carlo simulation model and the explicit service period the CEO is required to remain employed to vest in the award. The market condition is satisfied upon achieving certain stock price targets for a period following the completion of the Company’s Direct Listing. The CEO Performance Award also contains an implied performance-based vesting condition as the CEO’s ability to earn the award is contingent upon the completion of the Direct Listing. Accordingly, no expense was recognized prior to the completion of the Company’s Direct Listing on May 26, 2021, as vesting was not considered probable for accounting purposes until the Direct Listing occurred. Provided that Ian Siegel continues to be the CEO of the Company, stock-based compensation expense is recognized over the requisite service period, regardless of whether the stock price targets are achieved. If the stock price targets are met sooner than the derived service period, the Company will accelerate the recognition of stock-based compensation expense to reflect the cumulative expense associated with the vested shares. The determination of the fair value of stock-based awards with a market condition is inherently uncertain and subjective and involves the application of valuation models and assumptions requiring the use of judgment. If the Company had made different assumptions, its stock-based compensation expense, and its results of operations for the three and six months ended June 30, 2021 and June 30, 2020 may have been significantly different.
Recent Accounting Pronouncements	Accounting Pronouncements Not Yet Adopted As an “emerging growth company,” the Company is allowed by the Jumpstart Our Business Startups Act to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies. The Company has elected to use the adoption dates applicable to private companies. As a result, the Company’s financial statements may not be comparable to the financial statements of issuers who are required to comply with the effective date for new or revised accounting standards that are applicable to public companies. In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which replaces the existing model for measuring the allowance for credit losses for financial assets measured at amortized cost (including accounts receivable) to a model that is based on the expected losses rather than incurred losses. Under the new credit loss model, lifetime expected credit losses on such financial assets are measured and recognized at each reporting date based on historical, current, and forecast information. In November 2018, the FASB issued ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, and in April 2019, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments. These ASUs provide supplemental guidance and clarification to ASU 2016-13 and must be adopted concurrently with the adoption of ASU 2016-13, cumulatively referred to as “Topic 326.” This guidance is effective for fiscal years beginning after December 15, 2022 and interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the effects of the adoption of this update on its consolidated financial statements. In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which enhances and simplifies various aspects of income tax accounting guidance. This guidance is effective for fiscal years beginning after December 15, 2021, and interim periods within fiscal years beginning after December 15, 2022. Early adoption is permitted, including adoption in an interim period. An entity that elects to early adopt ASU 2019-12 in an interim period should reflect any adjustments as of the beginning of the annual period that includes that interim period. The Company is currently evaluating the effects of the adoption of this update on its consolidated financial statements. In August 2020, the FASB issued ASU 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which simplifies the accounting for certain convertible instruments, amends the guidance on derivative scope exceptions for contracts in an entity’s own equity, and modifies the guidance on diluted earnings per share calculations as a result of these changes. This guidance is effective for fiscal years beginning after December 15, 2023 and interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the effects of the adoption of this update on its consolidated financial statements. Recently Adopted Accounting Pronouncements In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, 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 ASC 350-40, in order to determine which costs to capitalize and recognize as an asset and which costs to expense. The Company early adopted ASU 2018-15 on January 1, 2021 and applied the changes prospectively. The adoption did not have a material impact on the Company’s condensed consolidated financial statements.
Earnings Per Share	Basic and diluted net income (loss) per share are computed using the two-class method as required when there are participating securities and multiple classes of common stock. Prior to May 14, 2021, when the Company’s Series A and B redeemable convertible preferred stock converted into shares of Class B common stock, the Company’s redeemable convertible preferred stock were participating securities as the holders of the redeemable convertible preferred stock were entitled to participate in dividends with common stock. In periods of net income, net income after deducting the accretion of redeemable convertible preferred stock was attributed to common stockholders and participating securities based on their participation rights. Net losses after deducting the accretion of redeemable convertible preferred stock are not allocated to the participating securities as the participating securities do not have a contractual obligation to share in any losses. In April 2021, the Company filed its amended and restated certificate of incorporation, which resulted in the creation of Class A common stock and Class B common stock. As the liquidation and dividend rights are identical for Class A and Class B common stock (see Note 9), the undistributed earnings under the two-class method are allocated on a proportional basis and the resulting net income (loss) per share attributable to common stockholders will, therefore, be the same for both Class A and Class B common stock on an individual or combined basis.

Basis of Presentation, Principles of Consolidation, and Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation and Principles of Consolidation

The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information. Accordingly, certain information and disclosures normally included in consolidated financial statements presented in accordance with U.S. GAAP have been condensed or omitted.

The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. The accompanying condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in the Company’s final prospectus filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended, on May 26, 2021 (the “Prospectus”). The consolidated balance sheet as of December 31, 2020 has been derived from our audited consolidated financial statements.

In the opinion of the Company’s management, the accompanying unaudited condensed consolidated financial statements include all adjustments (consisting of normal recurring adjustments) necessary for the fair statement of the condensed consolidated financial statements.

There have been no changes in the Company’s accounting policies from those disclosed in its audited consolidated financial statements and the related notes included in the Prospectus.

The operating results for the three and six months ended June 30, 2021 are not necessarily indicative of the results expected for the full year ending December 31, 2021 or any future period.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements, and the reported amounts of revenue and expenses during the reporting period. Significant estimates include revenue recognition, estimates relating to the measurement of operating lease right-of-use (“ROU”) assets and operating lease liabilities, determination of the fair value of stock-based awards, valuation of common stock in periods prior to becoming a public company, collectability of accounts receivable, impairment of long-lived assets, including goodwill, carrying value and useful lives of property and equipment and internal-use software, the amortization period for deferred commission costs, and income taxes. By their nature, estimates are subject to an inherent degree of uncertainty and actual results could differ from those estimates.

The impact of the Coronavirus pandemic (“COVID-19”) continues to evolve. As a result, many of the Company’s estimates and assumptions require increased judgment and carry a higher degree of variability and volatility.

As of the date these condensed consolidated financial statements are issued, the Company is not aware of any specific event or circumstance that would require an update to the Company’s estimates or judgments, or change to the carrying value of the Company’s assets or liabilities. However, these estimates and judgments may change as new events occur and additional information is obtained, which may result in changes being recognized in the consolidated financial statements in future periods. Actual results could differ from those estimates and any such differences may have a material impact on the financial statements.

Fair Value Measurements

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.

Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. Accounting standards describe a fair value hierarchy based on the following three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value:

- Level 1 — Quoted prices in active markets for identical assets, liabilities, or funds.

- Level 2 — Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

- Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The carrying amounts of the Company’s financial instruments, including accounts receivable, accounts payable, and accrued expenses approximate fair value because of their short-term maturities. The fair value of the Company’s convertible notes with related parties as of December 31, 2020 was estimated to be approximately $36.9 million, and was based on the value of shares into which the notes convert. The value of the shares represents a Level 3 input in the fair value hierarchy. The convertible

notes with related parties converted into shares of Class B common stock in connection with the Direct Listing in May 2021.

Certain assets, including goodwill and intangible assets are also subject to measurement at fair value on a non-recurring basis using Level 3 inputs, but only when they are deemed to be impaired. As of June 30, 2021 and December 31, 2020, no impairments were identified on those assets required to be measured at fair value on a non-recurring basis.

Segments and Geographic Information

The Company operates as a single operating segment. The Company’s Chief Operating Decision Maker (“CODM”), the Chief Executive Officer, regularly reviews financial information presented on a consolidated basis for purposes of assessing financial performance and allocating resources.

Stock-based Compensation for Awards with a Market Condition

In April 2021, the Company granted a RSU award (the “CEO Performance Award”), which included service, market, and performance based vesting conditions. The fair value of the award is determined using a Monte Carlo simulation model. The associated stock-based compensation is recorded over the requisite service period, using a graded attribution method. The requisite service period is the longer of the service period derived from the Monte Carlo simulation model and the explicit service period the CEO is required to remain employed to vest in the award. The market condition is satisfied upon achieving certain stock price targets for a period following the completion of the Company’s Direct Listing. The CEO Performance Award also contains an implied performance-based vesting condition as the CEO’s ability to earn the award is contingent upon the completion of the Direct Listing. Accordingly, no expense was recognized prior to the completion of the Company’s Direct Listing on May 26, 2021, as vesting was not considered probable for accounting purposes until the Direct Listing occurred. Provided that Ian Siegel continues to be the CEO of the Company, stock-based compensation expense is recognized over the requisite service period, regardless of whether the stock price targets are achieved. If the stock price targets are met sooner than the derived service period, the Company will accelerate the recognition of stock-based compensation expense to reflect the cumulative expense associated with the vested shares.

The determination of the fair value of stock-based awards with a market condition is inherently uncertain and subjective and involves the application of valuation models and assumptions requiring the use of judgment. If the Company had made different assumptions, its stock-based compensation expense, and its results of operations for the three and six months ended June 30, 2021 and June 30, 2020 may have been significantly different.

Recent Accounting Pronouncements

Accounting Pronouncements Not Yet Adopted

As an “emerging growth company,” the Company is allowed by the Jumpstart Our Business Startups Act to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies. The Company has elected to use the adoption dates applicable to private companies. As a result, the Company’s financial statements may not be comparable to the financial statements of issuers who are required to comply with the effective date for new or revised accounting standards that are applicable to public companies.

In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which replaces the existing model for measuring the allowance for credit losses for financial assets measured at amortized cost (including accounts receivable) to a model that is based on the expected losses rather than incurred losses. Under the new credit loss model, lifetime expected credit losses on such financial assets are measured and recognized at each reporting date based on historical, current, and forecast information. In November 2018, the FASB issued ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, and in April

2019, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments. These ASUs provide supplemental guidance and clarification to ASU 2016-13 and must be adopted concurrently with the adoption of ASU 2016-13, cumulatively referred to as “Topic 326.” This guidance is effective for fiscal years beginning after December 15, 2022 and interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the effects of the adoption of this update on its consolidated financial statements.

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which enhances and simplifies various aspects of income tax accounting guidance. This guidance is effective for fiscal years beginning after December 15, 2021, and interim periods within fiscal years beginning after December 15, 2022. Early adoption is permitted, including adoption in an interim period. An entity that elects to early adopt ASU 2019-12 in an interim period should reflect any adjustments as of the beginning of the annual period that includes that interim period. The Company is currently evaluating the effects of the adoption of this update on its consolidated financial statements.

In August 2020, the FASB issued ASU 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which simplifies the accounting for certain convertible instruments, amends the guidance on derivative scope exceptions for contracts in an entity’s own equity, and modifies the guidance on diluted earnings per share calculations as a result of these changes. This guidance is effective for fiscal years beginning after December 15, 2023 and interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the effects of the adoption of this update on its consolidated financial statements.

Recently Adopted Accounting Pronouncements

In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, 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 ASC 350-40, in order to determine which costs to capitalize and recognize as an asset and which costs to expense. The Company early adopted ASU 2018-15 on January 1, 2021 and applied the changes prospectively. The adoption did not have a material impact on the Company’s condensed consolidated financial statements.

Earnings Per Share

Basic and diluted net income (loss) per share are computed using the two-class method as required when there are participating securities and multiple classes of common stock.

Prior to May 14, 2021, when the Company’s Series A and B redeemable convertible preferred stock converted into shares of Class B common stock, the Company’s redeemable convertible preferred stock were participating securities as the holders of the redeemable convertible preferred stock were entitled to participate in dividends with common stock. In periods of net income, net income after deducting the accretion of redeemable convertible preferred stock was attributed to common stockholders and participating securities based on their participation rights. Net losses after deducting the accretion of redeemable convertible preferred stock are not allocated to the participating securities as the participating securities do not have a contractual obligation to share in any losses.

In April 2021, the Company filed its amended and restated certificate of incorporation, which resulted in the creation of Class A common stock and Class B common stock. As the liquidation and dividend rights are identical for Class A and Class B common stock (see Note 9), the undistributed earnings under the two-class method are allocated on a proportional basis and the resulting net income (loss) per share attributable to common stockholders will, therefore, be the same for both Class A and Class B common stock on an individual or combined basis.