CoStar vs Equity Residential
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.
Chicago apartment REIT (NYSE: EQR) ~80,000 apartments; Q4 2024 EPS $1.10 (+34%), same-store NOI +3.1% in 2024, 2025 guidance 2.25-3.25% rev growth in Boston/NYC/Seattle/SF competing with AvalonBay.
About
Equity Residential is a Chicago, Illinois-based apartment real estate investment trust — publicly traded on the New York Stock Exchange (NYSE: EQR) as an S&P 500 Real Estate component and member of the S&P 500 — owning and operating approximately 300 apartment communities with roughly 80,000 apartments concentrated in high-barrier-to-entry coastal and Sun Belt urban markets including Boston, New York, Washington D.C., Seattle, San Francisco Bay Area, Los Angeles, Denver, Atlanta, and Dallas through approximately 2,400 employees. In Q4 2024, Equity Residential reported earnings per share of $1.10 (versus $0.82 in Q4 2023, +34.1%), with full year 2024 same-store revenues increasing 3.0% and same-store net operating income (NOI) growing 3.1%. For 2025, the company provided guidance of 2.25%-3.25% same-store revenue growth, reflecting continued but moderating rent increases across its coastal and Sun Belt markets. Founded in 1966 by Sam Zell (who also founded Equity Commonwealth and other real estate enterprises), Equity Residential went public in 1993 and is managed by CEO Mark Parrell, who joined from Heitman Capital Management. The company's portfolio of professionally managed, amenity-rich apartment communities targets the affluent renter demographic — typically college-educated professionals earning $90,000-150,000 annually — who choose to rent in high-cost gateway cities rather than purchase.
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