Online real estate databases

Zillow Group, Inc., or simply Zillow, is an American tech real-estate marketplace company that was founded in 2006 by co-executive chairmen Rich Barton and Lloyd Frink, former Microsoft executives and founders of Microsoft spin-off Expedia; Spencer Rascoff, a co-founder of Hotwire.com; David Beitel, Zillow's current chief technology officer; and Kristin Acker, Zillow's current technology leadership advisor.

thumb|Redfin headquarters are in the Hill7 Building, in South Lake Union, Seattle Redfin, a subsidiary of Rocket Companies, provides real estate agent services for buying, selling, and renting homes in the United States and Canada.

Rightmove plc is a British company which runs rightmove.co.uk and the rightmove app. It is the UK's largest online real estate property portal. Rightmove is listed on the London Stock Exchange and is a constituent of the FTSE 100 Index.