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Best Prediction Market Apps and Sites in the US: Rankings, Offers and Legal States

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The best prediction market apps in the US let you trade on football games, Senate races, Fed decisions and the Billboard charts from a phone. Kalshi, Polymarket US, Robinhood and newer apps from DraftKings, FanDuel and Fanatics sell these event contracts under the Commodity Futures Trading Commission rather than state gaming regulators. That is why most legal prediction market sites accept 18-year-olds, even in states with no legal sports betting, and why a growing list of states is suing them.

The money is substantial. Pew Research Center, using data from The Block, found that Kalshi and Polymarket together handled about $25.7 billion of trading in May 2026 and $53.0 billion in July. Roughly 79% of July’s volume was sports. Robinhood says its customers traded a record 16.4 billion event contracts in the third quarter alone.

offers.bet has ranked the ten most popular prediction market platforms and picked out the five best-rated apps, with what each charges and offers new users and a map of where prediction markets are legal as the fight between the states and the federal regulator heads toward the Supreme Court. Every figure was checked against official sources on October 29, 2026.

We ranked platforms on three measures, in order of weight: verified trading volume or contract counts (Pew Research and company filings), user reach (App Store rating counts and the size of the parent app), and prominence in court cases and state enforcement. Only platforms confirmed live for US users on October 29, 2026 are included. Volume figures are notional, meaning the face value of contracts traded, so treat them as a guide to scale rather than revenue.

  1. Kalshi

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    CFTC-regulated exchange (KalshiEX LLC) · Min. age 18+

    Kalshi leads on every measure. Its notional volume reached about $40.1 billion in July 2026, roughly three times Polymarket’s, and its iPhone app carries 644,723 ratings. It is also the defendant in most of the big court cases.

  2. Polymarket US

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    CFTC exchange and clearing house (QCX LLC) · Min. ag