Best prediction markets and Polymarket alternatives
Kalshi and Polymarket US lead in the United States; international Polymarket remains the main crypto venue for world events; Manifold is the free play-money option. The right choice depends on where you live.
Market share (30 days to 18 October 2026)
| Platform | Notional volume | Share of tracked volume |
|---|---|---|
| Kalshi | $80.6B | ≈76% |
| Polymarket US | $12.7B | ≈12% |
| Polymarket (international) | $4.6B | ≈4% |
Source: DeFi Rate. The remainder is spread across other tracked venues. Notional volume counts every contract at $1, which flatters platforms with many cheap combo contracts.
Platforms compared
| Platform | Type | Availability |
|---|---|---|
| Kalshi | Regulated exchange | US (18+, or the local age of majority: 19 in AL/NE, 21 in MS). Court orders in force as of Sept 2026: Nevada (sports, el |
| Polymarket US | Regulated exchange | US, 18+. Third-party reviews report 40+ states, or 49 states plus DC with Nevada excluded (sources conflict). 'Not avail |
| PredictIt | Regulated exchange (politics only) | US residents 18+, nationwide. |
| Manifold Markets | Play-money | Worldwide (web and app) |
| Traditional sportsbooks (DraftKings, FanDuel, BetMGM, etc.) | Licensed bookmaker | Only in states with legal sports betting, within state borders (geolocation). Usually 21+. |
| Limitless Exchange | Crypto | Global except: no access from Russia, Belarus, Cuba, Iran, North Korea, Syria, Crimea, Donetsk or Luhansk. No trading fr |
| Predict.fun | Crypto | Global, except the United States, UK, France, Ontario, Singapore, Poland, Thailand, Taiwan, Australia, Belgium and sanct |
| Opinion (Opinion Labs) | Crypto | Global, except the United States, UK, France, Ontario, Singapore, Poland, Thailand, South Korea, China, Taiwan, Hong Kon |
| Myriad Markets | Crypto | Global web app (no published restricted-jurisdiction list found). Integrated as the native prediction market in Trust Wa |
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