Sam Altman, who was CEO of Loopt, which was recently acquired by Green Dot, led the round. “He’s been doing bigger investments lately,” Kan said.

Other investors include Stripe co-founder Patrick Collison, Parse co-founder Tikhon Bernstam, Gmail creator and Y Combinator partner Paul Buchheit, Google board member Ram Shriram, Matt Ocko, Delicious creator Josh Schachter and others. In total, there were about 25 people in the round.

Why did he do it this way? “I don’t typically need that much to test a business concept and we had a lot of people who were interested,” he said.