CoStar Group vs Zillow
Side-by-side comparison of AI visibility scores, market position, and capabilities
Washington DC commercial real estate information and analytics platform; NASDAQ: CSGP; $2.5B+ revenue; owns CoStar, LoopNet, Apartments.com, and Ten-X among others.
About
CoStar Group is the dominant commercial real estate information, analytics, and marketplace company in the United States, headquartered in Washington, DC. Founded in 1987 and publicly traded on NASDAQ (CSGP), CoStar has grown to over $2.5B in annual revenue through a combination of organic growth and strategic acquisitions. The company's portfolio of brands includes CoStar (the institutional CRE research and analytics platform), LoopNet (the leading commercial property listing marketplace), Apartments.com (the largest apartment listing marketplace), and Ten-X (the digital commercial real estate auction platform).\n\nCoStar's flagship research database aggregates data on millions of commercial properties across the US and internationally, including lease comparables, sales transactions, building specifications, tenant information, and market analytics. This data is gathered through a large field research team that physically visits and verifies properties, combined with automated data aggregation from public records, legal filings, and broker submissions. CoStar's subscribers include commercial real estate brokers, lenders, investors, corporate occupiers, and appraisers who rely on its data for deal sourcing, underwriting, and market research.\n\nCoStar has invested aggressively in international expansion, acquiring SIOR's data assets, OnTheMarket in the UK, and other regional platforms. The company also made a major push into residential real estate with its acquisition of Homesnap and investments in its Homes.com platform, competing with Zillow and Realtor.com. CoStar's combination of subscription data products, marketplace advertising, and transaction platforms makes it a uniquely diversified real estate technology company.
NASDAQ: Z largest US real estate marketplace with 204M monthly users and Zestimate AI valuations at $2.2B revenue; Premier Agent program and Zillow Home Loans competing with Realtor.com and Redfin for real estate transaction share.
About
Zillow Group is a Seattle-based real estate technology company — listed on NASDAQ (NASDAQ: Z and ZG) — operating the largest US real estate marketplace with 204 million monthly unique users browsing 160+ million US property listings, home valuations (the proprietary Zestimate AI algorithm), rental listings, and mortgage services, generating $2.2 billion in revenue in fiscal year 2024 through its Premier Agent program (paying real estate agents for lead referrals from buyers and sellers searching on Zillow), Zillow Home Loans (mortgage origination), and rental marketplace revenue. Founded in 2006 by Rich Barton and Lloyd Frink (former Microsoft and Expedia executives), Zillow created the consumer real estate search category with the Zestimate home valuation tool that gave homeowners and buyers unprecedented access to estimated market values outside of broker relationships.
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