# CoStar Group

**Source:** https://geo.sig.ai/brands/costar-group  
**Vertical:** PropTech  
**Subcategory:** CRE Market Data & Analytics  
**Tier:** Leader  
**Website:** costargroup.com  
**Last Updated:** 2026-04-14

## Summary

Washington DC commercial real estate information and analytics platform; NASDAQ: CSGP; $2.5B+ revenue; owns CoStar, LoopNet, Apartments.com, and Ten-X among others.

## Company Overview

CoStar Group is the dominant commercial real estate information, analytics, and marketplace company in the United States, headquartered in Washington, DC. Founded in 1987 and publicly traded on NASDAQ (CSGP), CoStar has grown to over $2.5B in annual revenue through a combination of organic growth and strategic acquisitions. The company's portfolio of brands includes CoStar (the institutional CRE research and analytics platform), LoopNet (the leading commercial property listing marketplace), Apartments.com (the largest apartment listing marketplace), and Ten-X (the digital commercial real estate auction platform).\n\nCoStar's flagship research database aggregates data on millions of commercial properties across the US and internationally, including lease comparables, sales transactions, building specifications, tenant information, and market analytics. This data is gathered through a large field research team that physically visits and verifies properties, combined with automated data aggregation from public records, legal filings, and broker submissions. CoStar's subscribers include commercial real estate brokers, lenders, investors, corporate occupiers, and appraisers who rely on its data for deal sourcing, underwriting, and market research.\n\nCoStar has invested aggressively in international expansion, acquiring SIOR's data assets, OnTheMarket in the UK, and other regional platforms. The company also made a major push into residential real estate with its acquisition of Homesnap and investments in its Homes.com platform, competing with Zillow and Realtor.com. CoStar's combination of subscription data products, marketplace advertising, and transaction platforms makes it a uniquely diversified real estate technology company.

## Frequently Asked Questions

### What is the difference between CoStar and LoopNet?
CoStar is a subscription-based institutional research platform used by CRE professionals for market data, lease comparables, and analytics. LoopNet is a public-facing commercial property listing marketplace where brokers advertise spaces and buyers search for properties.

### Is CoStar available outside the United States?
Yes. CoStar has expanded internationally with operations in the UK, Canada, and parts of Europe, driven by acquisitions including OnTheMarket in the UK and regional data providers in Europe.

### How does CoStar collect its property data?
CoStar employs a large field research team that physically visits and verifies commercial properties, combined with automated aggregation from public records, legal filings, and broker submissions, creating one of the most comprehensive and verified CRE databases available.

### What is CoStar Group and what products does it offer?
CoStar Group is the leading commercial real estate information and marketplace company. Its core products include CoStar (professional CRE research and analytics), LoopNet (CRE listings marketplace), Apartments.com (residential rental marketplace), and STR (hospitality data and analytics).

### Who uses CoStar's research platform?
CoStar's professional research platform is used by CRE brokers, investors, lenders, appraisers, corporate real estate teams, and REITs for property research, market analytics, lease comps, sale comps, and portfolio management. It is considered the industry standard data source for commercial real estate professionals.

### How does CoStar collect its property and transaction data?
CoStar employs a large field research team that conducts direct property surveys, broker interviews, and public records research. This primary research approach, combined with broker and principal data contributions, gives CoStar data depth and accuracy not available from public sources alone.

### What is the relationship between CoStar and LoopNet?
LoopNet is CoStar's public-facing commercial property listings marketplace where brokers advertise space for lease or sale and buyers and tenants search for properties. CoStar's professional platform provides deeper data and analytics for users who need more than a listings database.

### How is CoStar priced for professional subscribers?
CoStar professional subscriptions are enterprise-priced based on the markets covered, number of users, and products accessed. Annual contracts are standard. Pricing is negotiated directly with CoStar's sales team and varies significantly by firm size and use case.

## Tags

saas, b2b, proptech, platform, analytics, marketplace, enterprise, public

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*Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*