CoStar Group, Inc. is a provider of online real estate marketplaces, information and analytics in the United States (U.S.) and United Kingdom (U.K.). The Company provides online marketplaces for commercial real estate, apartment rentals, residential real estate, land for sale and businesses for sale. The Company manages its business geographically in two segments: North America, which includes the United States and Canada, and International, which includes the Europe, Asia-Pacific and Latin America. It also offers online platforms that manages workflow and marketing for residential real estate agents and brokers and provide residential property listings for homebuyers. Its services are primarily derived from a database of building-specific information and offer customers specialized tools for accessing, analyzing and using its information. The Company's brands include CoStar, Apartments.com, LoopNet, STR, Ten-X, BizBuySell, LandsofAmerica, Homes.com., and Homesnap.