Five legitimate Polymarket alternatives for US traders — Kalshi, Rebet, OG, and more — ranked by fees, liquidity, and legality.
For US traders, Kalshi is the closest direct alternative — CFTC-regulated, real USD via ACH, and strongest on US politics and economic data. Rebet and OG cover sports and crypto-funded niches respectively.
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Polymarket is one of the two global volume leaders, but it isn't always the right fit: it settles in USDC, the US app excludes Nevada, and some US-specific markets (politics, Fed data) have deeper books on Kalshi. The platforms below cover the gaps.
Kalshi is the most direct Polymarket alternative for US users. It's CFTC-regulated, takes real USD via ACH, and runs in 47 states + DC. Spreads are wider than Polymarket on flagship markets, but the UX is cleaner and there's no crypto wallet to manage.
Read our full Kalshi review for fees, app, and signup bonus.
Best for: US politics, Fed decisions, economic data, and anyone who refuses to touch crypto.
Rebet is a sweepstakes-model social prediction app available in 39 US states + DC. It's mobile-native, leans heavily on sports markets, and trades in Sweep Coins (redeemable for cash). See the Rebet review.
Best for: casual users, sports-heavy traders, and states where Polymarket or Kalshi aren't an option.
OG is Crypto.com's prediction market arm, available in 41 US states + DC. Funded entirely through Crypto.com, with a generous match bonus and tight integration into the broader Crypto.com ecosystem. Full OG review.
Manifold uses 'Mana' (play money) rather than real cash. It's a legitimate way to learn how prediction markets work without putting real money at risk — but you cannot cash out winnings.
PredictIt operates under a narrow CFTC no-action letter for political markets only. Position limits are tight ($850 per market) and the future of the exchange has been litigated. Useful for political junkies, not a serious Polymarket alternative.
Want the head-to-head? See our Polymarket vs Kalshi matchup and the full ranked best-platforms list.
For US traders, Kalshi is the closest direct alternative — CFTC-regulated, real USD via ACH, and strongest on US politics and economic data. Rebet and OG cover sports and crypto-funded niches respectively.
Yes — Kalshi is the leading example. It's CFTC-regulated, takes real USD via ACH, and is available in 47 states + DC. Rebet (sweepstakes model) is another non-crypto alternative.
Only for learning. Manifold uses play money ('Mana') with no cash-out, so it's good for testing your forecasting skill but isn't a real-money replacement.
Kalshi charges 5–7% on profits but no per-trade fee; Polymarket itself is the lowest at roughly 0.5–1% effective via spread. Rebet's effective take-rate is higher because of the sweepstakes mechanic.
Yes, under a narrow CFTC no-action letter for political markets only. Position limits are capped at $850 per market, making it unsuitable for serious size.
Catie has spent 15 years covering iGaming, sports betting, and now prediction markets — first as a trade reporter, later as head of editorial at two major industry publications. She has tested every regulated US event exchange since Kalshi's 2021 launch and writes the bulk of PredictionWins' platform reviews and tax explainers.
Reviewed against our editorial policy.
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