CoStar Group, Inc. provides information, analytics, and online marketplace to the commercial real estate industry in North America and internationally. The company offers CoStar Property Professional service that provides inventory of office, industrial, retail, and multifamily properties and land. It also provides CoStar COMPS Professional, that covers comparable commercial real estate sales information; CoStar Tenant, an online business-to-business prospecting and analytical tool; CoStarGo, an iPad application; CoStar Market Analytics, an analytics platform; CoStar Lease Comps, an integrated solution that captures, manages, maintains, and analyzes lease data; CoStar Advertising to market a space for lease or a property for sale; and CoStar Portfolio Strategy to meet the research needs of commercial real estate owners, investors, lenders, and government regulators. In addition, the company offers CoStar Investment Analysis Portfolio Maximizer, CoStar Investment Analysis Request, CoStar Real Estate Manager Corporate Edition, and CoStar Real Estate Manager Retail Edition that are real estate management software solutions; CoStar Private Sale Network, which provides clients with custom-designed and branded Websites; and CoStar Brokerage Applications to manage and optimize business operations. Further, it offers LoopNet Premium Lister for commercial real estate professionals and other customers to market their listings; LoopNet Premium Searcher for members searching for commercial real estate; LoopLink, an online real estate marketing and database services suite; apartment marketing sites, including Apartments.com, ApartmentHomeLiving.com, ApartmentFinder.com, Apartamentos.com, and WestsideRentals.com; LandsofAmerica and LandAndFarm that are online marketplaces for rural land for sale; and BizBuySell and BizQuest that are online marketplaces for operating businesses for sale. The company was founded in 1987 and is headquartered in Washington, the District of Columbia.