Polymarket vs Kalshi Features and Key Differences
Polymarket is a decentralized, blockchain-based, crypto-native prediction market with no trading fees and strong political market liquidity, while Kalshi is a centralized, regulated platform using fiat currencies with strong sports market liquidity and KYC requirements. Polymarket uses automated market makers with no central authority, whereas Kalshi operates with a traditional order book under financial regulation. Accessibility differs sharply between the two. Kalshi requires KYC verification, is US-only, and accounts cannot be created from many countries even with proper ID. Polymarket allows anonymous participation but is blocked in the USA. For market focus, Polymarket historically dominates political markets with an 84.1% market share, while Kalshi leads sports markets with a 72.4% market share. Kalshi has also recently overtaken Polymarket in crypto price market volume after a flippening in April. On fees and user experience, Kalshi charges trading fees but offers an APY program on cash balances and collateral, while Polymarket typically charges no trading fees. Polymarket has a better API for programming and has attracted users interested in arbitrage bots. Both platforms have faced issues with ambiguous resolutions, and some users have reported Polymarket holding funds under compliance review for extended periods.
