Zillow Inc., the real estate website that’s acquiring smaller rival Trulia Inc. for $3.5 billion, reported second-quarter sales that topped analysts’ estimates as traffic increased and more agents used its home-listing service.

Sales rose 68 percent to a record $78.7 million, from $46.9 million a year earlier, Zillow said Tuesday in a statement. That compared with analysts’ average prediction of $76.6 million, according to data compiled by Bloomberg.