CoStar vs Reonomy
Side-by-side comparison of AI visibility scores, market position, and capabilities
$2.74B revenue 2024 (+11% YoY); $732M Q1 2025 revenue (+12% YoY); 56th consecutive quarter double-digit growth; 134M+ monthly unique visitors Q4 2024; 6,400+ employees in 14 countries
About
CoStar Group is the leading provider of commercial real estate data, analytics, and marketplace platforms, founded in 1987 in Washington, D.C. by Andrew Florance. The company was built on the conviction that commercial real estate — one of the world's largest asset classes — was fundamentally underserved by reliable data, and that building a proprietary research infrastructure to collect, verify, and distribute property information would create a durable competitive moat. CoStar's core technology combines a massive field research organization with digital data collection tools to maintain the most comprehensive commercial real estate database in the world.\n\nCoStar's product portfolio spans multiple platforms serving different segments of the real estate market: CoStar for commercial real estate professionals, LoopNet for commercial property marketing, Apartments.com for multifamily rental search, Homes.com for residential real estate, and Ten-X for online commercial property auctions. This multi-platform strategy positions CoStar Group as the data and marketplace layer across every major real estate segment. The company attracted more than 134 million unique monthly visitors across its networks in Q4 2024, demonstrating the scale of its audience reach.\n\nCoStar Group reported $2.74 billion in revenue for 2024, an 11% year-over-year increase, marking its 56th consecutive quarter of double-digit revenue growth — a remarkable consistency streak in enterprise SaaS. The company's combination of proprietary data assets, marketplace network effects, and expanding residential real estate ambitions gives it multiple growth vectors as it targets the vast residential brokerage market that dwarfs its existing commercial business.
Altus Group (TSX: AIF) CRE data platform acquired for $250M in 2021; 50M+ US commercial property records with ownership graph for 100K+ customers competing with CoStar for commercial real estate intelligence and deal sourcing.
About
Reonomy is a New York-based commercial real estate data and analytics platform — acquired by Altus Group (TSX: AIF) in November 2021 for $250 million, integrating into Altus Group's commercial real estate intelligence portfolio — providing real estate brokers, lenders, investors, and service providers with comprehensive property intelligence including 50+ million US commercial property records, ownership information (individual and entity-level), transaction history, financial details, and market analytics that enable CRE professionals to identify deal opportunities, evaluate properties, and source off-market transactions. Prior to acquisition, Reonomy had raised $130 million and served 100,000+ customers from its database of 50M+ properties, 80 million companies, and 300 million people.
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