Best Prediction Markets in 2026

What a prediction market is

A prediction market lets you buy shares in the outcome of an event: an election, a match, a rate decision. On Polymarket a winning share redeems for $1.00 and a losing one for $0.00, so a share trading at 30¢ is the market saying "about 30% likely". You buy from and sell to other users, and you can sell before the event if the price moves your way. The platform earns a fee on trades instead of building a margin into the odds, which is the core difference from a sportsbook.

The catch is that "not a bookmaker" does not mean "not gambling". Regulators disagree on what these platforms are, and several have acted against them. I report what they did and when; whether you may trade where you live is for you and the law there to settle.

Prediction market vs sports betting: what each costs

Take a 50-50 event. A sportsbook offering -110 on both sides keeps $10 of every $220 staked, a 4.55% margin you pay through the price. Buy the same 50-50 on Polymarket at 50¢ and the cost is a taker fee: 100 shares in a sports market cost $1.25 in fees on a $50 stake, about 2.5%. Kalshi's general fee on 100 contracts at 50¢ is about $1.75, or 3.5%. Polymarket charges makers nothing, so a patient limit order pays no fee at all.

Two details change the picture. Both fee formulas multiply by p × (1 − p), so fees peak at 50¢ and shrink toward 0¢ and 100¢; a 10¢ Kalshi contract costs about $0.63 per hundred. And neither number includes the spread between the best bid and ask, which on a thin market can cost more than the fee. For scale, regulated New Jersey sportsbooks held 6.2% of handle in June 2026 and 11.9% in July.

How I rate these platforms

Same principles as every list on how I rate, adapted to an exchange:

• a published fee schedule with the formula, not just "low fees";
• written resolution rules for every market: the source, the end date and the edge cases;
• a published list of blocked or close-only countries;
• crypto deposits and withdrawals to a wallet you control, with any fees stated, and at least one withdrawal of mine timed on the payout tests page;
• no unresolved payout disputes that would put it on the Shit List.

The two platforms I have reviewed

Polymarket is the deeper and cheaper market: a peer-to-peer order book with taker-only fees, no identity step in the polymarket.com sign-up and no Polymarket fees on USDC deposits or withdrawals. The price is regulation: the international site is not regulated by the CFTC, trading is restricted in 39 countries, and disputed markets go to a UMA token-holder vote that takes 4–6 days.

Kalshi is the regulated one: a CFTC-designated exchange since 2020, open to many countries outside the US, with free crypto, card and bank withdrawals. The price is paperwork and politics: full KYC with a live photo of your ID before the first deposit, coin and country lists that sit behind the logged-in app, and US states fighting its sports contracts in court.

Neither has a payout test of mine yet, and neither pays this site anything. I put the two side by side on Kalshi vs Polymarket. Among the casinos I have reviewed, Roobet shows a Predictions tab that I have not tested, and Bovada takes politics bets as a sportsbook, at sportsbook prices.

What to watch out for

• Geoblocking. Polymarket lists close-only countries, where you can only exit positions, including the US, the UK, France, Germany, Italy, Australia, Brazil and several Canadian provinces, and fully blocks Iran, Syria, Cuba and North Korea. polymarket.com blocks US trading and points US users to a separate polymarket.us.
• Regulator actions. The CFTC fined Polymarket's operator $1.4 million in January 2022. Belgium's gaming commission blacklisted Polymarket in January 2025. France's ANJ banned transactions to it in November 2024 and ordered the site blocked in July 2026. The UK Gambling Commission said in February 2026 that prediction markets could not be treated as non-gambling and would need a betting intermediary licence.
• Resolution disputes. Polymarket markets resolve through UMA's oracle: a proposer posts a $750 bond, there is a 2-hour challenge window, and disputes go to a vote of UMA token holders. Polymarket's own advice is to read the resolution rules before trading.
• Fee categories. Polymarket's rates differ by category: 0.07 on crypto markets, 0.05 on sports, 0.04 on politics and finance, zero on geopolitics.

Common mistakes

Comparing a 50¢ share with decimal odds without converting. Ignoring the spread on small markets. Buying at market when a limit order would have paid no fee. Trading a market whose resolution source you have not read. And assuming that a court win in the US, such as Kalshi's 2024 win against the CFTC over congressional election contracts, says anything about the rules in your own country.

How to use this list

The cards above show each platform with its score and coins; the review has the fee formula, the resolution rules and the blocked countries. If you want to bet on sport with crypto at fixed odds, see crypto sportsbooks; US readers should also check US-friendly crypto casinos for how offshore operators handle state lists. Polymarket settles in USDC and Kalshi takes it as a deposit, so both show up on the USDC page next to the casinos that take that coin.