Product development, in principle, is rather simple: take the good and build on it; take the bad and eliminate it. Repeat ad infinitum and success is more or less guaranteed. But finding out the good and figuring out the bad is easier said than done. We built Two Thumbs to simplify this process. Two Thumbs is an API-first user feedback system that replaces overly complex feedback surveys (NPS, CSAT, CES, etc.) with nothing but a binary choice and an optional comment, while delivering the same insights and more, directly to Slack.