Description of Business and Basis of Presentation	12 Months Ended
Description of Business and Basis of Presentation	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Basis of Presentation	Description of Business and Basis of Presentation Description of Business Blend Labs, Inc. (the “Company,” “Blend,” “we,” “us,” or “our”) was incorporated on April 17, 2012. The Company offers a cloud-based software platform for financial services firms that is designed to power the end-to-end consumer journey for banking products. The Company’s solutions make the journey from application to close fast, simple, and transparent for consumers, while helping financial services firms increase productivity, deepen customer relationships, and deliver exceptional consumer experiences. On June 30, 2021, the Company acquired 90.1% interest in Title365, an underwritten title insurance agency engaged in selling title insurance policies and escrow services throughout the United States. Integrating Title365 with the Company’s software platform enables financial services firms to automate title commitments and streamline communication with consumers and settlement teams, enabling the customers to accelerate the title, settlement, and closing process at scale for mortgages, home equity lines of credit, and home equity loans. Basis of Presentation, Principles of Consolidation, and Use of Estimates The consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). The accompanying consolidated financial statements include the accounts of Blend Labs, Inc. and its subsidiaries in which the Company holds a controlling financial interest. Noncontrolling interest represents the minority stockholder’s share of the net income and equity in a consolidated subsidiary. All intercompany balances and transactions have been eliminated in consolidation. The preparation of financial statements in conformity with U.S. GAAP requires management to make, on an ongoing basis, estimates and assumptions that affect the amounts reported in the financial statements and the notes thereto. Actual results may differ from those estimates. Such estimates include, but are not limited to, estimates of variable consideration, estimates of standalone selling prices of performance obligations in customer contracts with multiple performance obligations, evaluation of contingencies, evaluation of collectability of accounts receivable, determination of reserves for title and escrow losses, determination of period of benefit for deferred contract costs, determination of the incremental borrowing rates used in calculations of lease liabilities, determination of fair value of stock-based compensation, determination of fair value of warrants, valuation of deferred tax assets, valuation of acquired intangible assets, valuation of the redeemable noncontrolling interest, determination of useful lives of tangible and intangible assets, and assessment of impairment of goodwill and intangible assets. The Company’s consolidated financial statements for the year ended December 31, 2021 include the results of Title365 from the acquisition date through December 31, 2021. Initial Public Offering and Capital Structure Change On July 20, 2021, the Company completed its initial public offering (the “IPO”), with a subsequent partial exercise of the underwriters’ option to purchase additional shares on August 17, 2021. The Company issued and sold an aggregate of 22,468,111 shares of Class A common stock, par value $0.00001, at an offering price of $18.00 per share, and received aggregate net proceeds of $366.7 million, after deducting underwriters' discounts and commissions of $27.3 million and offering expenses of $10.4 million. Immediately prior to the completion of the IPO, the Company filed an Amended and Restated Certificate of Incorporation, which authorized the issuance of 3,200,000,000 shares of capital stock, $0.00001 par value per share, consisting of: 1,800,000,000 shares of Class A common stock; 600,000,000 shares of Class B common stock; 600,000,000 shares of Class C common stock; and 200,000,000 shares of preferred stock. Upon the effectiveness of the filing of the Amended and Restated Certificate of Incorporation, (i) all outstanding shares of Convertible Preferred Stock converted into 146,872,568 shares of Class A common stock, (ii) all outstanding shares of Class A common stock converted into shares of Class B common stock on a one-for-one basis, (iii) all shares of Class A common stock were reclassified as Class B common stock and all shares of Class B common stock were reclassified as Class A common stock, and (iv) 12,883,331 shares of Class A common stock (as reclassified) beneficially owned by the Co-Founder and Head of Blend were exchanged for an equivalent number of shares of Class B common stock. At the completion of the IPO, 214,132,175 shares of Class A common stock and 12,883,331 shares of Class B common stock were issued and outstanding. No shares of Class C common stock or preferred stock were issued and outstanding. The following is a summary of the rights of the holders of the Company’s capital stock: Common Stock Subsequent to the IPO, the Company has three classes of authorized common stock: Class A common stock, Class B common stock, and Class C common stock. The rights of the holders of Class A common stock, Class B common stock, and Class C common stock are identical, except with respect to voting and conversion. Dividend Rights Subject to preferences that may apply to any shares of preferred stock outstanding at the time, the holders of the Company’s common stock will be entitled to receive dividends out of funds legally available if the Company’s board of directors, in its discretion, determines to issue dividends and then only at the times and in the amounts that the Company’s board of directors may determine. Voting Rights Holders of the Class A common stock are entitled to one vote for each share held on all matters submitted to a vote of stockholders, holders of the Class B common stock are entitled to 40 votes for each share held on all matters submitted to a vote of stockholders, and holders of the Class C common stock are not entitled to vote on any matter that is submitted to a vote of stockholders, except as otherwise required by law. The holders of the Class A common stock and Class B common stock will vote together as a single class, unless otherwise required by law. After the completion of the IPO, the Co-Founder and Head of Blend held all of the issued and outstanding shares of the Company’s Class B common stock. No Preemptive or Similar Rights The Company’s common stock is not entitled to preemptive rights and is not subject to conversion, redemption or sinking fund provisions. Right to Receive Liquidation Distributions If the Company becomes subject to a liquidation, dissolution, or winding-up, the assets legally available for distribution to the Company’s stockholders would be distributable ratably among the holders of the Company’s common stock and any participating preferred stock outstanding at that time, subject to prior satisfaction of all outstanding debt and liabilities and the preferential rights of and the payment of liquidation preferences, if any, on any outstanding shares of preferred stock. Conversion of Class B Common Stock Each share of Class B common stock is convertible at any time at the option of the holder into one share of Class A common stock. Shares of Class B common stock will automatically convert into shares of Class A common stock upon sale or transfer except for certain transfers described in the Amended and Restated Certificate of Incorporation, such as certain transfers effected for estate planning or charitable purposes. Conversion of Class C Common Stock After the conversion or exchange of all outstanding shares of the Company’s Class B common stock into shares of Class A common stock, all outstanding shares of Class C common stock will convert automatically into Class A common stock, on a share-for-share basis, on the date or time specified by the holders of a majority of the outstanding shares of Class A common stock, voting as a separate class. Preferred Stock The Company’s board of directors has the authority to issue preferred stock in one or more series, to establish from time to time the number of shares to be included in each series and to fix the designation, powers, preferences and rights of the shares of each series and any of its qualifications, limitations or restrictions, in each case without further vote or action by the Company’s stockholders. Reverse Stock Split On June 29, 2021, the Company’s board of directors approved a three-for-one reverse stock split of its capital stock, which the Company’s stockholders subsequently approved on July 2, 2021 and which became effective on July 2, 2021. The authorized number of shares of each class and series of the Company’s capital stock was proportionally decreased in accordance with the three-for-one reverse stock split, and the par value of each class of capital stock was not adjusted as a result of the reverse stock split. All common stock, Convertible Preferred Stock, stock options, warrants, and per share information presented within these consolidated financial statements have been adjusted to reflect this reverse stock split on a retroactive basis for all periods presented.