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

Total Active Markets

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

122,371

Total Volume

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

$5,586,740,888

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.

$475,966,484

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.

$2,691,719,004

Polymarket$2.32BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.

Kalshi$350.67MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.

Limitless$18.48MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.