The massive seed round was led by Index Ventures and Ribbit Capital, with participation from Sarah Guo’s Conviction Partners.
Mach’s approach differs sharply from some of its peers.
Five years later the founders, now 24 years old, say their startup has achieved $300 million in annualized revenue.
As prediction markets explode, the new firm called 5(c) Capital, will back startups supporting the burgeoning category.