PredictMarketCap - Compare Prediction Market Odds | Polymarket, Kalshi & Limitless

Total Active Markets

Count of all non-resolved markets currently tracked across Polymarket, Kalshi, and Limitless.

127,500

Total Volume

Lifetime trading volume across all platforms. Polymarket and Kalshi report volume directly; Limitless volume is cumulative USDC traded.

$5,747,904,092

24h Volume

24-hour trading volume. Polymarket and Kalshi report this directly. Limitless does not break out 24h volume separately, so it is not included.

$570,610,853

Total Open Interest

Polymarket: sum of pool liquidity. Kalshi: open interest (contracts outstanding). Limitless: uses total volume as a proxy — no separate OI metric is available.

$3,344,264,634

Polymarket$2.96BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.

Kalshi$356.00MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.

Limitless$23.89MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.