Business	12 Months Ended
Business	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	Business Description of the Business Compass, Inc. (the “Company”) was incorporated in Delaware on October 4, 2012 under the name Urban Compass, Inc. On January 8, 2021, the board of directors approved a change to the Company’s name from Urban Compass, Inc. to Compass, Inc. The Company provides an end-to-end platform that empowers its residential real estate agents to deliver exceptional service to seller and buyer clients. The Company’s platform includes an integrated suite of cloud-based software for customer relationship management, marketing, client service and other critical functionality, all custom-built for the real estate industry, which enables the Company’s core brokerage services. The platform also uses proprietary data, analytics, artificial intelligence, and machine learning to deliver high value recommendations and outcomes for Compass agents and their clients. The Company’s agents are independent contractors who affiliate their real estate licenses with the Company, operating their businesses on the Company’s platform and under the Compass brand. The Company generates revenue from clients through its agents by assisting home sellers and buyers in listing, marketing, selling and finding homes as well as through the provision of services adjacent to the transaction, like title and escrow services, which comprise a smaller portion of the Company’s revenue to date. The Company currently generates substantially all of its revenue from commissions paid by clients at the time that a home is transacted. Stock Split In March 2021, the Company’s board of directors and the stockholders of the Company approved a ten-for-one forward stock split of the Company’s common stock and convertible preferred stock (collectively, the “Capital Stock”), which became effective on March 19, 2021. The authorized number of each class and series of Capital Stock was proportionally increased in accordance with the ten-for-one stock split and the par value of each class of Capital Stock was adjusted from $0.0001 to $0.00001 as a result of this forward stock split. All common stock, convertible preferred stock, stock options, restricted stock units (“RSUs”) and per share information presented within these consolidated financial statements have been adjusted to reflect this forward stock split on a retroactive basis for all periods presented. Initial Public Offering On April 6, 2021, the Company completed its initial public offering (“IPO”) and the Company’s Class A common stock began trading on the New York Stock Exchange on April 1, 2021 under the symbol “COMP”. In connection with the IPO, the Company issued and sold 26.3 million shares of its common stock at a public offering price of $18.00 per share. The Company received aggregate proceeds of $438.7 million from the IPO, net of the underwriting discount and offering costs of approximately $11.0 million (of which $0.9 million were paid in 2020). Offering costs, including the legal, accounting, printing and other IPO-related costs have been recorded in Additional paid-in capital against the proceeds from the offering. During April 2021, also in connection with the IPO, all series of the Company’s convertible preferred stock then outstanding were converted into 223.0 million shares of common stock and the Company reclassified $1.4 billion of convertible preferred stock to Additional paid-in-capital.