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Summary of Significant Accounting Policies (Policies)
9 Months Ended
Sep. 30, 2023
Accounting Policies [Abstract]  
Basis of Presentation Basis of PresentationThe accompanying unaudited consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). Any reference in these notes to applicable guidance is meant to refer to the authoritative GAAP as found in the Accounting Standards Codification (“ASC”) and Accounting Standards Updates (“ASUs”) of the Financial Accounting Standards Board (“FASB”).
Principles of Consolidation
Principles of Consolidation
The accompanying consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany transactions are eliminated in consolidation.
Use of Estimates
Use of Estimates
The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Significant items subject to such estimates and assumptions include, but are not limited to, the allowance for doubtful accounts, fair value of investment option and warrants, estimated life of prepaid marketing expense, and historical valuation of common stock and stock-based compensation.
The Company evaluates estimates based on historical and anticipated results, trends, and various other assumptions. The Company assesses these estimates on a regular basis; however, actual results could differ from these estimates.
Segment Information
Segment Information
Operating segments are defined as components of an entity for which separate financial information is available and that is regularly reviewed by the Chief Operating Decision Maker (“CODM”) in deciding how to allocate resources to an individual segment and in assessing performance. The Company’s CODM is its Chief Executive Officer. The Company has determined that it operates in one operating segment and one reportable segment as the CODM reviews financial information presented on a consolidated basis for purposes of making operating decisions, allocating resources, and evaluating financial performance.
Revenue Recognition, Deferred Revenue and Deferred Contract Acquisition Costs
Revenue Recognition
The Company provides a SaaS solution for personalized email and SMS marketing services through a cloud-based analytics platform. The core functionalities of the software are segmentation of users’ customer lists to facilitate targeted messaging via email and SMS and the use of data science and analytics to evaluate historical sales and predict consumer activity. Revenues are derived primarily from subscription revenues, which are comprised of subscription fees from customers accessing its hosted platform services for targeted messaging.
Contractual subscriptions for customers generally auto-renew on either a monthly, quarterly, or annual basis, and customers may elect not to renew by providing at least five days’ advance notice for contracts on a monthly billing cycle and thirty days’ advance notice for contracts with any other billing cycle. The customer does not have the right to take possession of the Company’s software. Subscription pricing is determined based on a customer’s profile and messaging count and monthly messaging quantities and is considered fixed, based on a tiered pricing structure. Variable consideration in the Company’s contracts is not material but represents the overage charges incurred by customers who exceed their allotments.

The Company recognizes revenue under the core principle to depict the transfer of control to the Company’s customers in an amount reflecting the consideration to which the Company expects to be entitled. In order to achieve that core principle, the Company evaluates its revenue arrangements under the five-step model as follows: (1) identify the contract with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when or as the Company satisfies a performance obligation.

Typically, the SaaS subscription contracts consist of a single performance obligation, and revenue is recognized over time as the performance obligation is satisfied. The performance obligation is deemed to be satisfied ratably as the customer simultaneously receives and consumes the services that the Company performs and typically have the same term. Due to the term of a majority of the Company’s contracts being less than one year, the Company has determined a significant financing component does not exist.
The Company accounts for individual performance obligations separately if they have been determined to be distinct (i.e., the services are separate if identifiable from other items in the arrangement and the customer can benefit from them on their own or with other resources that are readily available to the customer). The transaction price is allocated to the distinct performance obligations on a relative stand-alone selling price basis. Stand-alone selling prices are determined based on the prices at which the Company separately sells subscriptions.
Sales taxes collected from customers and remitted to government authorities are excluded from revenue. The Company incurs fees based on transaction volume and dollars processed through its credit card processor which are classified as general and administrative expense. Through the Company’s credit card processor, all receivables related to credit cards are collected within three business days.
Deferred Revenue
Deferred revenue primarily consists of billings in advance of revenue recognition from subscription services and is recognized as the revenue recognition criteria is met.
The Company generally bills its subscription customers monthly on the first day of the subscription term. Deferred revenue that is expected to be recognized during the succeeding 12-month period is recorded as deferred revenue.
Deferred Contract Acquisition Costs
Deferred contract acquisition costs are incremental costs incurred in connection with acquiring a customer contract and consists primarily of sales commissions and the associated payroll taxes. The Company expects to benefit from those costs for more than one year as the Company primarily pays sales commissions on the initial contract, and there are no commensurate commissions paid on contract renewals.
Deferred contract acquisition costs are amortized on a basis consistent with the transfer of the services to which the asset relates. This results in capitalized costs being recognized on a ratable basis over the estimated period of future benefit ranging from 18 months to 60 months. The Company estimates the future period of benefit considering the size of the customer, the current contract term, the impact of estimated customer renewal terms, and the estimated life of the technology solution underlying the contracts. The Company periodically reviews the carrying amount of capitalized costs to determine whether events or changes in circumstances have occurred that could impact the period of benefit.
Cost of Revenue
Cost of Revenue
Cost of revenue consists of costs related to supporting and hosting the Company’s software platform and channel offering for paying customers. These costs primarily include cloud-based infrastructure costs, outbound communication sending
costs, employee-related costs including payroll, benefits, bonuses, and stock-based compensation expense related to the customer support team, amortization of capitalized internal-use software development costs, and allocated overhead costs, including rent, facilities, depreciation, and costs related to information technology.
Share-Based Compensation and Non-Vested Restricted Common Stock
Stock-Based Compensation
The Company recognizes stock-based compensation on awards granted under two stock compensation plans, which are described in more detail in Note 11. Stock-Based Compensation.
The Company measures stock-based compensation awards, including stock options and RSUs, based on the estimated fair value of the awards on the date of grant. Stock-based compensation expense is recorded for awards issued to employees and non-employees at fair value with a corresponding increase in additional paid-in capital. For awards with service conditions only, the Company recognizes compensation expense on a straight-line basis over the requisite service period of the award. Forfeitures are recognized when they occur.
RSUs granted under the Company’s 2015 Stock Incentive Plan are subject to both service-based and performance-based vesting conditions, whereby the performance condition is satisfied upon occurrence of a liquidity event. Compensation cost related to awards with liquidity-based vesting conditions has been recognized through September 30, 2023, as the Company’s registration statement on Form S-1 filed with the SEC in connection with the IPO became effective on September 19, 2023, which satisfied the liquidity-based vesting condition of the Double-Trigger RSUs. Compensation expense for these awards with both a service and performance condition are expensed under the accelerated attribution method which includes a cumulative catch up recorded upon the IPO for services that had been completed as of the IPO. The remaining expense for these awards will be recognized using the accelerated attribution method over the remaining service period. The fair value of each RSU grant is calculated based on the estimated fair value of the Company’s common stock on the date of grant, or, if modified, the date of modification.
RSUs granted under the Company’s 2023 Stock Option and Incentive Plan are made with respect to shares of Series A common stock and are subject to service-based vesting conditions only. Compensation costs related to these awards will be recognized using the straight-line method over the service period of the award. The fair value of each RSU grant is calculated based on the fair value of the Company’s Series A common stock on the date of grant, or, if modified, the date of modification.
Until our IPO, given the absence of an active market for the Company’s common stock, management and the Board of Directors (the “Board”) were required to estimate the fair value of the Company’s common stock at the time of each grant of a stock-based compensation award. The Company and the Board utilized various valuation methodologies in accordance with the framework of the American Institute of Certified Public Accountants’ Technical Practice Aid, Valuation of Privately Held Company Equity Securities Issued as Compensation to estimate the fair value of its common stock. Each valuation methodology includes estimates and assumptions that require the Company’s judgment. These estimates and assumptions include a number of objective and subjective factors in determining the value of the Company’s common stock at each grant date, including the following factors:
prices paid for the Company’s capital stock, which the Company has sold to outside investors in arm’s-length transactions, considering the rights and privileges of the securities sold relative to the common stock;
prices paid for shares of its common stock sold in secondary market transactions;
valuations performed by an independent valuation specialist;
the Company’s stage of development and revenue growth;
the market performance of comparable publicly traded companies;
adjustments necessary to recognize a lack of marketability for the common stock underlying the granted options and RSUs;
the likelihood of achieving a liquidity event for the common stock underlying the stock-based awards, such as an IPO or sale of the Company, given prevailing market conditions; and
the U.S. and global economic and capital market conditions and outlook.

Following our IPO, there is an active market for our Series A common stock which is utilized to measure the fair value of the Company's underlying shares.
Non-Vested Restricted Common Stock
The Company may grant non-vested restricted common stock to employees, directors, and consultants with or without cash consideration. These grants contain certain restrictions on the sale of the shares. Non-vested restricted common stock are considered issued, but not outstanding, for accounting purposes until they vest. Upon termination of the relationship with a holder of the non-vested restricted common stock, the Company has the right to repurchase the non-vested restricted common stock at the price paid by the holder or, if there was no consideration, a price per share as defined in the Company’s agreement with the holder of the restricted common stock. All restricted common stock was vested as of September 30, 2023.
Redeemable Common Stock
Redeemable Common Stock

Redeemable common stock represents shares of the Company’s common stock that are redeemable at the option of the investor after a specified date. The initial carrying amount of redeemable common stock is equal to the respective issuance date fair value of the common stock subject to redemption, less issuance costs. The carrying amount is adjusted to equal the redemption value, which is equal to the fair value of a single share of common stock at the end of each reporting period. The carrying amount is subject to a floor equal to the initial carrying amount. The resulting changes in the redemption value are recorded with corresponding adjustments against retained earnings, if available, additional paid-in capital or accumulated deficit. Redeemable common stock is classified outside of permanent equity on the Consolidated Balance Sheets as the redemption option is outside of the Company’s control. As the redemption feature applicable to certain shares of the Company’s common stock was terminated upon the IPO, all shares of the Company’s redeemable common stock converted into 64,046,223 shares of Series B common stock on September 19, 2023 upon the effectiveness of the Company’s registration statement on Form S-1 filed with the SEC. Refer to Note 10. Redeemable Common Stock, Common Stock, and Stockholders' Equity (Deficit) for further discussion.
Income Taxes
Income Taxes
The Company accounts for income taxes in accordance with ASC 740, Income Taxes (“ASC 740”), which utilizes the asset and liability method for the financial accounting and reporting of income taxes. Under this method, deferred income taxes are recognized for the expected future tax consequences of differences between the tax bases of assets and liabilities and their reported amounts in the financial statements. The amount of any future tax benefit associated with deferred tax assets is reduced by a valuation allowance when there is uncertainty that those tax benefits will be realized.
The Company accounts for uncertain tax positions using a more-likely-than-not recognition threshold in accordance with ASC 740. The evaluation of uncertain tax positions is based on factors including, but not limited to, changes in tax law, the measurement of tax positions taken or expected to be taken in tax returns, the effective settlement of matters subject to audit, new audit activity, and changes in facts or circumstances related to a tax position. Interest and penalties related to uncertain tax positions are included as a component of income tax expense.
Accounts Receivable
Accounts Receivable
Accounts receivable are shown net of an allowance for doubtful accounts of $1.4 million and $2.3 million as of September 30, 2023 and December 31, 2022, respectively. The allowance for doubtful accounts is established to represent the Company’s best estimate of the net realizable value of the outstanding amount of receivables that it will be unable to collect. The development of the Company’s allowance for doubtful accounts is based on a review of factors such as the customer’s payment history, historical loss patterns, the general economic climate, age, and past due status of invoices. If circumstances relating to specific customers change or unanticipated changes occur in the general business environment, the Company’s estimates of the recoverability of receivables could be further adjusted.

The allowance for doubtful accounts consists of the following activity (in thousands):

Nine Months Ended September 30,
20232022
Balance at beginning of the period$2,253 $1,917 
Provisions for uncollectible accounts, net of recoveries(109)416 
Write offs(702)(26)
Balance at end of the period$1,442 $2,307 
Accounts receivable is shown inclusive of unbilled accounts receivable of $1.1 million and $0.5 million as of September 30, 2023 and December 31, 2022, respectively. The unbilled accounts receivable is made up entirely of overages incurred by customers who have exceeded their messaging allotment as of period end but are not yet due for their period end billing.
Cash, Cash Equivalents, and Restricted Cash
Cash, Cash Equivalents, and Restricted Cash
The Company considers all highly liquid investments with a remaining maturity of three months or less when purchased to be cash equivalents. As of September 30, 2023, the Company had cash equivalents of $310.9 million in money market funds. As of December 31, 2022, the Company did not have cash equivalents.
As of September 30, 2023 and December 31, 2022, the Company had a current restricted cash balance of $0.4 million and $0.4 million, respectively. As of September 30, 2023 and December 31, 2022, the Company had a non-current restricted cash balance of $0.6 million and $0.7 million, respectively. Restricted cash at September 30, 2023 and December 31, 2022, related to the Company’s required collateral to fund payroll and credit card obligations in its Australian entity as well as collateral required to be held as a result of the Company’s office lease in Australia. Restricted cash is included in current assets for obligations that expire within one year and is included in non-current assets for assets that expire more than 1 year from the balance sheet date.
Fair Value Measurements
Fair Value Measurements

Certain assets and liabilities are carried at fair value in accordance with Accounting Standards Codification ASC 820, Fair Value Measurement (“ASC 820”). Fair value is defined as the 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. The guidance establishes a fair value hierarchy that prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows:

Level 1 – Quoted prices in active markets for identical assets or liabilities
Level 2 – Observable inputs (other than level 1 quoted prices), such as quoted prices in active markets for similar assets or liabilities, quoted prices in markets that are not active for identical or similar assets or liabilities, or other inputs that are observable or can be corroborated by observable market data.
Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to determining the fair value of the assets or liabilities, including pricing models, discounted cash flow methodologies and similar techniques.

To the extent the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.
As of September 30, 2023 and December 31, 2022, the Company’s carrying amounts of financial instruments, including cash, restricted cash, accounts receivable, accounts payable, and accrued liabilities approximate their fair values due to their short maturities.

Certain non-financial assets, such as intangible assets, right of use assets, and property and equipment, are measured at fair value on a non-recurring basis and are adjusted to fair value only if an impairment charge is recognized. Such fair value measures are considered to be within the Level 3 valuation hierarchy due to the subjective nature of the unobservable inputs used. The Company has not recorded any impairment charges during any of the periods presented.
Loss Per Share
Loss Per Share
In accordance with FASB ASC 260, Earnings Per Share, the basic net loss per share is computed by dividing net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the applicable period.
Diluted net loss per share is computed in the same manner as basic net income loss per share after assuming the issuance of common stock for all potentially dilutive equivalent shares. See Note 12. Loss Per Share for further information.
Shopify Collaboration Agreement
Shopify Collaboration Agreement
On July 28, 2022, the Company entered into a collaboration agreement with Shopify Inc. and certain of its affiliates (collectively, “Shopify”) to form a strategic relationship for the purposes of creating greater interoperability between the Klaviyo and Shopify platforms and forming a strategic product, distribution, and marketing relationship. The collaboration agreement has a term of 7 years and automatically renews for successive one-year periods unless the Company or Shopify provides written notice of non-renewal. In connection with the collaboration agreement, the Company entered into 3 separate agreements including a revenue sharing agreement, common stock warrant agreement, and stock purchase agreement.

Under the revenue sharing agreement, the Company will make payments to Shopify in exchange for marketing services received under the collaboration agreement, which are comprised of payments for the Shopify Core Revenue Share and payments for the Shopify Plus Integration Fee. These payments are calculated as follows:

Shopify Core Revenue Share: For all revenue generated through the use of the Company’s email and SMS marketing applications by Shopify merchants designated as “Shopify Core Merchants” in respect of leads attributed to Shopify, the Company is obligated to pay Shopify a percentage of such revenues or the amounts owed to Shopify under the terms of Shopify’s standard partnership agreements applicable to all Shopify partners, which is 15% of any revenues exceeding a $1 million threshold.

Shopify Plus Integration Fee: On a monthly basis, the Company is required to pay Shopify a fee (“Shopify Plus Integration Fee” or “Integration Fee”), subject to an annual increase at Shopify’s election (up to a maximum increase of not more than a percentage calculated through a formula provided in the revenue sharing agreement), with respect to each Shopify Plus Merchant where all of the following circumstances apply: (a) the Shopify Plus Merchant was on Shopify’s Plus program at the end of the relevant month; (b) one or more of the Shopify Plus Merchant’s covered stores has the Company’s application installed at both the beginning and at the end of the relevant month; and (c) the Company’s application received a webhook request and/or made any Application Programming Interface calls against one or more of the Shopify Plus Merchant’s covered stores in the relevant month (i.e., the Company’s application is integrated with the Shopify platform and data is flowing between them).

The Company determined that Shopify is a vendor and not a customer, as the collaboration agreement is a services contract under which the Company is receiving marketing services from Shopify in exchange for payments under the revenue sharing agreement. The revenue sharing agreement is a mechanism for Shopify to be compensated for the customer
acquisition and marketing services Shopify is providing to the Company. Shopify is not a reseller or distributor of our Platform, nor does Shopify provide any services on the Company’s behalf. Fees paid under the revenue share agreement are recognized as a component of selling and marketing expense in the Consolidated Statements of Operations and Comprehensive Loss. During the three and nine months ended September 30, 2023, the Company incurred $5.6 million and $16.0 million, respectively, in selling and marketing expense related to fees paid under the revenue sharing agreement. During the three and nine months ended September 30, 2022, the Company incurred $2.9 million in selling and marketing expense related to fees paid under the revenue sharing agreement. As of September 30, 2023 and December 31, 2022, the Company had $2.4 million and $2.7 million in accrued expenses owed to Shopify for fees payable under the revenue sharing agreement, respectively.
As consideration for the collaboration agreement, the Company also issued warrants that allow Shopify to purchase up to 15,743,174 shares of common stock at a price of $0.01 per share, of which 25% of the warrants vested on the grant date on July 28, 2022, and the remaining 75% of the warrants vest quarterly over the remaining 5 year period. The aggregate grant date fair value of the warrants was $370.3 million and will be capitalized to prepaid marketing expense as the warrants vest. The prepaid marketing expense asset is amortized into selling and marketing expense on a straight-line basis over the expected benefit period, which is the 7 year term of the collaboration agreement.
Pursuant to the common stock warrant agreement, upon the Company’s IPO, 25% of the total number of warrants were accelerated, and the remaining unvested portion vests quarterly over the remaining term. During the three and nine months ended September 30, 2023, the Company capitalized prepaid marketing expense of $106.5 million and $134.2 million related to the vested warrants, respectively. For the three and nine months ended September 30, 2023, the Company recorded marketing expense of $13.2 million and $39.7 million, respectively, in the Consolidated Statements of Operations and Comprehensive Loss as a component of selling and marketing expense related to the amortization of the prepaid marketing expense. For the three and nine months ended September 30, 2022, the Company recorded marketing expense of $8.8 million in the Consolidated Statements of Operations and Comprehensive Loss as a component of selling and marketing expense related to the amortization of the prepaid marketing expense. As of September 30, 2023 and December 31, 2022, the Company’s prepaid marketing expense is $179.0 million and $84.4 million, respectively. As of September 30, 2023, there is $308.6 million of unrecognized marketing expense related to the warrants that will be recognized over 5.8 years. Refer to Note 10. Redeemable Common Stock, Common Stock, and Stockholders' Equity (Deficit) for further discussion of the warrants.
On June 24, 2022, the Company entered into a stock purchase agreement with Shopify. On the closing date of July 28, 2022, Shopify purchased 2,951,846 shares of common stock for $33.88 per share. The stock purchase agreement gives Shopify the right to purchase 15,743,174 additional shares of common stock for $88.93 per share (the “Investment Option”). The common stock and Investment Option were determined to be freestanding financial instruments purchased at fair value and were accounted for separately from the collaboration agreement, revenue sharing agreement, and common stock warrant. Refer to Note 10. Redeemable Common Stock, Common Stock, and Stockholders' Equity (Deficit) for further discussion of the common stock purchase and Investment Option.
Recent Accounting Pronouncements
Recent Accounting Pronouncements
The Company has implemented all applicable accounting pronouncements that are in effect and there are no new accounting pronouncements that have been issued that would have a material impact on its financial position or results of operations.