Prediction market volume
Prediction market exchanges by volume
Every exchange tracked, ranked by notional volume over the 30 days through Oct 6, 2026: $89.14B in total. Each number comes from the exchange's own daily report.
| # | Exchange | Operator | 30 days | Share | vs prior 30 | Latest day |
|---|---|---|---|---|---|---|
| 1 | Kalshi | KalshiEX LLC | $66.89B | 75.0% | +59% | Oct 6 |
| 2 | Polymarket US | QCX LLC (Polymarket US) | $10.19B | 11.4% | +167% | Oct 7 |
| 3 | Polymarket | Polymarket (international, on-chain) | $4.47B | 5.0% | −1.2% | Oct 6 |
| 4 | Crypto.com | Crypto.com | Derivatives North America (CDNA) | $1.85B | 2.1% | +90% | Oct 7 |
| 5 | Novig | Novig Exchange | $1.77B | 2.0% | +134% | Oct 6 |
| 6 | DraftKings | Railbird Exchange, LLC (DraftKings Predictions) | $1.71B | 1.9% | 6.8× | Oct 1 |
| 7 | Robinhood | Rothera Markets (Robinhood / Susquehanna) | $1.25B | 1.4% | +99% | Oct 7 |
| 8 | Underdog | Underdog Exchange (UDX) | $953M | 1.1% | +135% | Oct 6 |
| 9 | Gemini | Gemini Titan, LLC | $44.1M | <0.1% | +17% | Oct 7 |
| 10 | ForecastEx | ForecastEx LLC (Interactive Brokers) | $18.8M | <0.1% | −13% | Oct 7 |
Questions
Which prediction market has the most volume?
Kalshi, with 75.0% of notional volume over the 30 days through Oct 6, 2026. The top three were Kalshi (75.0%), Polymarket US (11.4%), Polymarket (5.0%).
How many prediction market exchanges are there in the U.S.?
Volume Race tracks 10 venues with published daily volume: 9 CFTC-registered exchanges plus Polymarket's international exchange. Exchanges without public daily data, such as ProphetX, are listed on the methodology page.
Volume is notional: contracts traded × each contract's payout. Volume an app routes to another exchange is counted once, at the exchange where it trades. Methods and sources · Kalshi vs Polymarket