CoStar Group, Inc. is a leading provider of information, analytics, and online marketplace services across various sectors including commercial real estate, hospitality, and residential industries. With a broad international presence, CoStar delivers a comprehensive suite of products such as CoStar Property for real estate inventory, CoStar Sales for transaction data, and market analytics tools. Additionally, it offers online platforms for apartment and business listings, including ApartmentFinder.com and BizBuySell.com, alongside innovative tools for lease management and real estate investment analysis. Founded in 1987, CoStar is headquartered in Washington, D.C., serving professionals globally.