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Kalshi vs Polymarket — and every other US prediction market.
Head-to-head comparisons of every major federally-regulated prediction market open to US traders. Compare Kalshi, Polymarket, Sleeper, PrizePicks and Underdog on fees, liquidity, market depth and World Cup 2026 coverage.
Side-by-side comparisons of the major federally-regulated prediction markets, written for US traders choosing between Kalshi, Polymarket, Sleeper, PrizePicks, and Underdog.
Kalshi today. Polymarket as its US relaunch matures.
Read the comparisonKalshi for dedicated prediction market traders. Crypto.com if you already use it for crypto.
Read the comparisonNovig for sharp sports trading. Kalshi for broad coverage. Most serious traders use both.
Read the comparisonKalshi for most the US traders. Sleeper if your fantasy life already runs through the app.
Read the comparisonChalkboard if you trade player props. Sleeper if you trade games and teams, especially with friends.
Read the comparisonSleeper if you already use it for fantasy. Rebet if you don't, and want cross-sport social trading.
Read the comparisonPicking between platforms
Kalshi vs Polymarket — which wins for US traders?
- Kalshi wins on regulation, USD funding, and ease of use. Polymarket wins on market depth and global political coverage, but most US traders start on Kalshi and add Polymarket later for specific markets.
Are Polymarket perpetuals legal in the US?
- Yes. Polymarket's 2026 US perpetual-futures product is offered through a CFTC-registered venue and is open to US residents 21+.
What's the best platform for sports prop bets?
- For binary game-outcome markets, Kalshi. For parlay-style player props, Sleeper Picks, PrizePicks, or Underdog Fantasy.