Research4Founders is a free newsletter for founders who want to find a startup idea using research. Each post takes one new paper, patent, open-source project or market signal, checks every claim against its source, runs a bull vs bear debate, and gives it a 0 to 100 Founder Score with a tier (S, A, B, C or Reject). We publish the ideas we reject too, and say why. Posts go out on Mondays and Thursdays.