Colin Kroll, the co-founder of HQ Trivia and Vine, was found dead in his Manhattan apartment on Sunday, NBC News reported.
Police responded to a 911 call for a welfare check at the Spring Street apartment on Sunday, a New York Police Department Spokesman told NBC News. Kroll was 34, police said.
Police found Kroll unconscious and unresponsive in a bedroom of the apartment, the spokesman said.
He was pronounced dead on the scene, police said.