Compstak is a real estate data and analytics company that provides commercial real estate professionals with the information they need to make informed decisions. The company collects and analyzes data on commercial properties, including lease and sales comparables, operating expenses, and tenant information. Compstak's platform allows users to access this data in real-time, enabling them to make more informed decisions about buying, selling, or leasing commercial real estate. The company was founded in 2011 and is headquartered in New York City.