Nine platforms now compete for US prediction market traders, and they differ on the things that cost you money: fee structures that vary by 10x on the same trade, sports contracts that are legal in one state and geofenced in the next, and fund protections that range from federal segregation to a sweepstakes ledger. These comparisons put the differences side by side, scored with our published methodology.
Start Here: The Full Rankings
Best Prediction Market Platforms (July 2026)
All nine platforms ranked by composite score — Kalshi (7.4) leads, Polymarket (7.1) closes in after opening fully in the US, and the 2026 wave (OG, ProphetX, Underdog, Fanatics, Novig) fills out the field. Includes the full comparison table, use-case picks, and what we’re watching next.
Head-to-Head Matchups
Kalshi vs Polymarket
The two best platforms, category by category. Kalshi wins on regulatory track record, platform coverage, and market breadth; Polymarket wins on fees and liquidity — and since May 2026, US residents can actually choose between them.
Kalshi vs FanDuel Predicts
Depth versus ease. Kalshi has more markets and better fees; FanDuel is simpler to fund (PayPal/Venmo) and faster to withdraw from. The right answer depends on how seriously you plan to trade.
Best-For Rankings
Best Prediction Markets for Beginners
Ranked by how gently each platform treats a first-time trader: funding friction, interface clarity, minimums, and how easy it is to lose money by accident.
Compare Costs Yourself
Fee structures are the hardest thing to compare in your head — a formula fee, a flat per-contract fee, a percentage of payout, and a percentage of winnings can each be cheapest depending on the trade. The fee calculator does the math for your exact trade size and price. And because sports-contract availability now varies sharply by state, run the legality checker before committing to a platform for sports trading.
More Comparisons Coming
The 2026 platform wave created matchups we haven’t scored yet — Polymarket vs FanDuel Predicts, OG vs Fanatics Markets, ProphetX vs Novig among them. They’ll publish here as we complete them. Want one prioritized? Tell us.
Not sure what any of this means yet? Start with What Are Prediction Markets? and Your First Prediction Market Trade.