Brokerages, rental sites vie with big 4 real estate portals for audience share

Zillow, Trulia, and Yahoo Homes account for 35 percent of traffic

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The big four real estate portals -- Zillow, Trulia, and Yahoo Homes -- continue to dominate the real estate category, accounting for more than 1 in 3 visits in September, according to data from Web analytics company Experian Marketing Services. But scrappy brokerages like Redfin and ZipRealty continue to mix it up with rental sites for the traffic that's left, a list of top 20 real estate portals compiled by Experian shows. Also noteworthy: Century 21 and Re/Max are the only franchisors with websites in the top 20. A public-facing website operated by the Houston Association of Realtors,, is on the list. Referal site debuted on the list in August. Websites Total Visits Visits Share Rank August 2013 Rank July 2013 Rank June 2013 Zillow 54,186,720 14.07% 1 1 1 33,745,644 8.76% 2 2 2 25,727,652 6.68% 3 3 3 Yahoo! Homes 20,5...