CoStar Group

CoStar Group, Inc. is an American real estate information company that operates online real estate marketplaces and provides property data and analytics for commercial and residential properties.

• 🏠 Website
  • costargroup.com #56,714
• 💼 Legal name
  • CoStar Group, Inc.
• 🏤 Headquarters
  • Arlington, Virginia, United States
• 🗓️ Founded
  • 1987 (39 years ago)
• 🔗 Links
  • Wikipedia

⚡ Technologies

We track 2 technologies owned or developed by CoStar Group, Inc. that are used across the web.

#	Technology	Reach The percentage of websites using the technology out of the total number of sites analyzed.
1	Apartments.com An American online rental marketplace that allows users to search for apartments, houses, condos, and townhomes using listings provided by property managers, landlords, and private owners.	0.001%
2	Homes.com An American online real estate marketplace that allows users to search for homes and browse neighborhood data using listings from multiple listing service databases, property managers, and licensed real estate professionals.

🗃️ About This Data

• We evaluate the popularity of technologies based on the number of websites where we detect their usage.
• Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
• This report is based on the analysis of 3,976,354 websites.
• Statistics were last calculated on October 30, 2026.
• For more details, see our methodology and disclaimer.