Forecasting platforms

  • manifold.markets (play money)
  • metaculus.com (play money, occasional cash prizes)
  • predictit.org (real money)
  • replicationmarkets.com (real money)
  • polymarket.com (ethereum)
  • augur.net (ethereum)
  • hypermind.com (real money)
  • GJOpen.com (leaderboard plus gigs for winners)
  • kalshi.com (real money)
  • Foresight Exchange (play money)
  • INFER (play money)
  • Cultivate Flashcast (bragging rights)
  • predictionbook.com (just score)