CoStar Group CSGP

FinanceMarket cap $30B3 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.

Explore CoStar Group on the interactive map Relationship timeline Find a path to another company

Suppliers 1

Companies that sell to CoStar Group

AmazonConsumer & Retail · $2.0TCoStar Apartments.com runs on AWS cloud

Customers 2

Companies CoStar Group sells to

AmazonConsumer & Retail · $2.0TIndustrial market data
CBRE GroupReal Estate · $38BCommercial real estate data

Partners 2

Strategic partnerships, joint products and alliances

CBRE GroupReal Estate · $38BCoStar data used by CBRE brokers for deals
ZillowFinance · $14BZillow vs CoStar competing real estate data platforms

Other Finance companies

Berkshire Hathaway JPMorgan Chase Visa Mastercard Bank of America Wells Fargo American Express Blackstone Goldman Sachs HSBC

Embed this on your site

Show CoStar Group's network in an article or report - it updates as our data does.

<iframe src="https://vexmap.com/embed.html?co=CSGP" width="600" height="420" style="border:0;border-radius:12px;max-width:100%" title="CoStar Group on VexMap" loading="lazy"></iframe>

Preview

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