Angi (Angie's List) vs CoStar
Side-by-side comparison of AI visibility scores, market position, and capabilities
IAC-owned (NASDAQ: ANGI) home services marketplace connecting 200K+ professionals with homeowners; Happiness Guarantee competing with Thumbtack and Amazon Home Services for $600B home services lead generation.
About
Angi (formerly Angie's List, rebranded 2021) is an Indianapolis-based home services marketplace connecting homeowners with local service professionals — plumbers, electricians, HVAC technicians, cleaners, landscapers, and 500+ other home service categories — through a two-sided marketplace that generates revenue from service provider advertising, HomeAdvisor lead generation, and Angi Key subscription memberships. Operated by IAC/Angi Inc. (NASDAQ: ANGI), Angi has 200,000+ service professionals on the platform and provides the Happiness Guarantee that protects homeowners from unsatisfactory service outcomes.
$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.
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