Tom Gruber, one of the original Siri cofounders, has left Apple, where he was recently the head of Siri’s Advanced Development group, according to multiple people familiar with the matter. Apple’s head of search, Vipul Ved Prakash, has also left the company.
An Apple spokeswoman confirmed both departures. Mr. Gruber is retiring and will be pursuing personal interests in photography and ocean conservation, said people. His departure comes as the Siri group is undergoing a major leadership change, with the announcement last week that John Giannandrea, the former Google artificial intelligence research and search chief who joined Apple in April, would take over the unit.