The CEO and who also co-founded the video platform Vine was found by police in his flat after his girlfriend reportedly asked them to check on him.
An HQ spokesperson confirmed the death
“with deep sadness”.
Vine co-founder Colin Kroll
HQ Trivia, a live trivia game on mobiles became hugely popular in teenager and one of the best game of this year.
New York Police Department visited Mr Kroll’s apartment in Manhattan to checkout on him after his GF reported and found his body along with drugs.
“We learned today of the passing of our friend and founder, Colin Kroll, and it’s with deep sadness that we say goodbye. Our thoughts go out to his family, friends and loved ones during this incredibly difficult time.”
The company confirmed Mr Kroll’s age after police had initially said 35.
Mr Kroll’s father to New York Times:
“He had so much talent and had accomplished so much at such a young age. It truly is a waste.”
Mr Yusupov paid tribute to his partner on Twitter: