The two most popular real estate search sites are now under one roof since Zillow closed the Trulia acquisition deal after closing bell on Tuesday. Zillow shares surged more than 10 percent on Wednesday mostly on the news of cost-cutting.

Zillow CEO Spencer Rascoff told CNBC's "Squawk Alley" on Wednesday that "we are well positioned as the $13 billion of real estate advertising migrates on to the Internet."