CoStar Group CSGP

FinanceMarket cap $11B3 connections

CoStar is the dominant data and analytics platform for commercial real estate - brokers, developers, and investors can't function without its property data, lease comps, and analytics. Its Apartments.com and Homes.com are expanding aggressively into residential real estate, directly challenging Zillow for consumer attention.

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Suppliers 1

Companies that sell to CoStar Group

AmazonConsumer & Retail · $2.7TCoStar Apartments.com runs on AWS cloud

Customers 2

Companies CoStar Group sells to

AmazonConsumer & Retail · $2.7TIndustrial market data
CBRE GroupReal Estate · $39BCommercial real estate data

Partners 2

Strategic partnerships, joint products and alliances

CBRE GroupReal Estate · $39BCoStar data used by CBRE brokers for deals
ZillowFinance · $7BZillow vs CoStar competing real estate data platforms

Other Finance companies

JPMorgan Chase Berkshire Hathaway Visa Mastercard Bank of America Morgan Stanley Goldman Sachs Wells Fargo American Express BlackRock

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Relationships are compiled by VexMap from company filings, announcements and reporting, and last reviewed September 2026. Spotted something wrong? Tell us. Not investment advice.