Detailed Narrative
Strategic Re-segmentation and Strong Financial Performance
CoStar Group has revised its reporting segments into Commercial and Residential to better align with how the business is managed and provide clearer financial performance insights. For Q4 FY25, revenue increased 27% year-over-year to $900 million, contributing to a full-year 2025 revenue of $3.2 billion, up 19%. Adjusted EBITDA for 2025 reached $442 million, an 83% increase, positioning the company well for its 2026 guidance of $740 million to $800 million. This marks the 59th consecutive quarter of double-digit revenue growth.
Homes.com's Rapid Growth and AI Innovation
Homes.com has become the fastest-growing residential portal in the U.S., achieving over 2.1 billion views and 100 million average monthly unique visitors in 2025. Its annualized revenue run rate reached $100 million, making it CoStar's fastest organic revenue build for a new product. The recent launch of Homes AI has dramatically increased user engagement, with AI users spending 16 minutes 50 seconds on site (compared to 4 minutes 24 seconds for non-users) and generating 7x more email leads. This AI is built on Microsoft Azure OpenAI and proprietary models, ensuring data privacy within CoStar's ecosystem.
Apartments.com Dominance and Market Dynamics
Apartments.com continues to demonstrate strong market leadership, generating $308 million in Q4 FY25 revenue (up 11% YoY) and $1.25 billion for the full year. The platform added a record 14,000 paying properties in 2025, reaching 89,275 total, supported by a 99% monthly renewal rate and 92 NPS. Management highlighted a significant competitive advantage, noting a 14% year-over-year increase in Apartments.com visits in January 2026, contrasting with substantial traffic declines for competitors like Zillow and Redfin. The platform is also expanding its sales force, with 522 reps at year-end 2025, targeting a $10 billion TAM.
Commercial Segment Expansion and Product Development
The Commercial segment, including CoStar, LoopNet, and other services, grew 18% to $1.79 billion in 2025. CoStar revenue grew 10% in Q4 FY25, supported by a 20% increase in its sales team to 492 reps and a 94% renewal rate. Key product initiatives include the upcoming release of CoStar France and Australia, a new homes information module, and a rent benchmark product utilizing AI for lease abstraction. CoStar Debt Solutions surpassed $100 million in annual run rate revenue, with plans to launch debt benchmarking and loan origination in 2026 and 2027, respectively.
Global Marketplace and Technology Integration
LoopNet saw its fastest growth since 2021, with Q4 FY25 revenue up 17% year-over-year, driven by record net new sales. The company plans to expand LoopNet into Australia and Germany in 2026, building a global commercial real estate marketplace. Matterport is also scaling its sales force and developing the next-generation Pro4 camera, alongside AI-powered features like 'furnish' and 'X-ray' functionality. CoStar is actively integrating acquired platforms like Domain and OnTheMarket into its Homes.com software environment to drive synergies and improve margins, with Domain integration expected within 12-18 months and OnTheMarket in 2027.
Proprietary Data Moat and AI Advantage
CoStar emphasizes its significant competitive advantage in the AI era due to its massive proprietary real estate data, which includes 2.4 trillion fields of data, 700,000 Matterports, and billions of proprietary images. This data is protected by strong authentication and is not accessible to external LLM AI crawlers. The company receives direct data feeds from over 94,000 hotels, 500 financial institutions, 2,000 corporations (including Fortune 500), 300 homebuilders, and 85,000 apartment managers, enabling it to build transformative AI-powered solutions that cannot be replicated by publicly available data.