Zillow, BlueKai, Smilebox Top Startup List

According to Seattle 2.0’s startup index for December, real-estate firm Zillow’s website remains tops in traffic, while online marketing startup BlueKai and creative messaging site Smilebox made strong gains to crack the top three. Other notable gains in the top 100 were made by Estately, GoGoMo, Blist, InsideTrip, ClearStay, Dashwire, and Tesly.

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