CoStar vs Realty Income
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.
San Diego net lease REIT (NYSE: O) "Monthly Dividend Company" at 15,621 properties; AFFO $4.19 (+4.8%, 14 consecutive years growth), Spirit Realty $9.3B merger completed Jan 2024, 7.1% acquisition yield.
About
Realty Income Corporation is a San Diego, California-based net lease real estate investment trust — publicly traded on the New York Stock Exchange (NYSE: O) as an S&P 500 Real Estate component and a member of the S&P 500 Dividend Aristocrats — owning and managing 15,621 commercial properties in the United States, United Kingdom, and Europe under long-term net lease agreements with retail, industrial, and gaming tenants through approximately 650 employees. Realty Income is nicknamed "The Monthly Dividend Company" for its unbroken record of paying monthly dividends to shareholders every month since 1994 and achieving 14 consecutive years of AFFO (Adjusted Funds From Operations) per share growth — in fiscal year 2024, AFFO per share reached $4.19 (+4.8%) and monthly dividends paid per share totaled $3.126 (+2.5%). The company invested $1.7 billion in new properties at a 7.1% initial weighted average cash yield during 2024. Realty Income's most significant recent transaction was the merger with Spirit Realty Capital (completed January 2024, approximately $9.3 billion) — expanding the portfolio from approximately 13,000 to 15,621 properties and adding a significant diversified retail, casual dining, and industrial portfolio that enhanced Realty Income's geographic diversification across the continental US. CEO Sumit Roy leads Realty Income's strategy of growing the net lease portfolio through sale-leaseback transactions with operators seeking to unlock capital from owned real estate while maintaining long-term occupancy.
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