Nature of Business	12 Months Ended
	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business	Nature of BusinessAppFolio, Inc. ("we," "us" or "our") is a leading provider of cloud business management solutions for the real estate industry. Our solutions are designed to enable our property manager customers to digitally transform their businesses, address critical business operations and deliver a better customer experience. Digital transformation is effectively a requirement for business success in the modern world, and the way we work and live requires powerful software solutions.During the year ended December 31, 2020, we also provided cloud-based solutions and services to the legal industry via MyCase, a solution primarily designed for small and mid-sized law firms. As previously disclosed, we completed the sale of MyCase, Inc. on September 30, 2020. For additional details, see Note 3, Sales of Subsidiary Businesses.