CoStar Group, Inc. is a provider of information, analytics and online marketplaces for the commercial real estate industry. The company gathers property-level data, builds market analytics and supplies research tools used by brokers, owners, lenders, investors and other real estate professionals to evaluate markets, track inventory and manage listings. CoStar’s offerings are delivered primarily through subscription-based platforms that combine proprietary databases, mapping and workflow applications to support decision-making across the property life cycle.
In addition to its core CoStar research service, the company operates prominent online listing and marketing platforms that connect buyers, sellers, tenants and brokers. These marketplaces host commercial and multifamily property listings, digital marketing services and transaction-support tools that facilitate leasing and sales activity. CoStar also provides specialized market reports, forecasting and performance metrics that subscribers use for portfolio analysis, site selection and competitive benchmarking.
Founded in the late 1980s, CoStar has expanded its product set and geographic footprint over time through internal development and acquisitions, growing from a U.S.-focused research service into a multi-brand provider with operations in North America and selected international markets. The company is headquartered in Washington, D.C., and its leadership has emphasized building comprehensive data coverage and technology-driven solutions to address the information needs of real estate professionals.
Andrew C. Florance, CoStar’s founder, has long served as the company’s chief executive and has been a prominent figure in guiding its strategy and expansion. CoStar’s position in the industry stems from its emphasis on continuous data collection, platform development and integration of marketplace services with analytics for a broad set of commercial real estate users.
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