Kalshi is the first CFTC-regulated prediction market exchange in the US. Trade on real-world events including economics, politics, weather, and more with contracts that pay out based on outcomes.

Polymarket is the world's largest prediction market by volume. Originally crypto-only, it re-entered the US market in late 2025 with CFTC no-action relief. Known for deep liquidity on political and current events.

PredictIt is an academic prediction market operated by Victoria University of Wellington. After winning a court case in 2025 to continue US operations, it remains popular for political markets with a loyal user base.