The largest regulated prediction market in the US
Kalshi is the largest regulated prediction market in the United States, holding approximately 66% of the US market share as of early 2026. Founded in 2020 and headquartered in New York City, Kalshi operates as a CFTC-designated contract market (DCM) and has processed over $43.1 billion in trading volume through 2025. The platform was valued at $22 billion in its most recent funding round, making it one of the most valuable fintech startups in the country.
Kalshi uses a binary contract model where traders buy "Yes" or "No" shares on the outcome of real-world events. Each contract is priced between $0.01 and $0.99, representing the market's implied probability of that event occurring. If your prediction is correct, the contract pays out $1.00. If incorrect, you lose your investment.
Orders are matched through a central limit order book (CLOB), meaning you trade against other participants rather than against the house. This creates transparent, market-driven pricing. You can buy and sell contracts at any time before the market closes, allowing you to lock in profits or cut losses without waiting for the event to resolve.
Kalshi stands out as the only prediction market exchange to achieve $22 billion in valuation and $43.1 billion in annual volume. The platform powers Robinhood's prediction market offering, which generated over 3 billion contracts traded in November 2025 alone. Kalshi's central limit order book provides deep liquidity across its most popular markets, with bid-ask spreads often under $0.03 on high-volume contracts.
The platform supports advanced order types including limit orders, and provides historical price charts and probability graphs for every market. Kalshi also offers a REST API for algorithmic traders and market makers.
Kalshi charges zero trading fees on all buy and sell orders. The only transaction cost is a $0.01 per contract settlement fee when a market resolves. Deposits via bank transfer are free, while debit card deposits may incur a small processing fee. Withdrawals to a linked bank account take 1-3 business days and are free for standard transfers. Wire transfers are available for larger amounts.
The minimum deposit is $1, making Kalshi accessible to traders at any level. There is no account maintenance fee or inactivity charge.
Kalshi's web interface features a clean, modern design with a market browser organized by category. The dashboard displays your portfolio, open orders, and account balance at a glance. Market pages show real-time order books, price history charts, and contract details.
The mobile app for iOS and Android provides full trading functionality, though it lacks some of the polish seen in consumer-focused apps like FanDuel or Robinhood. Onboarding requires KYC verification with a government-issued ID, which typically completes in minutes but can take up to 24 hours during high-demand periods.
Kalshi offers markets across six categories: sports (NFL, NBA, MLB, NHL, soccer), politics (elections, policy decisions, approval ratings), economics (GDP, inflation, jobs reports, Fed rate decisions), weather (hurricane landfalls, temperature records, snowfall), finance (stock prices, crypto prices, IPOs), and culture (award shows, social media milestones). The platform typically lists several hundred active markets at any given time, with new markets added daily.
Sports markets represent the fastest-growing category, driven in part by the Robinhood partnership that brought millions of new traders to Kalshi's order book.
Kalshi is the best choice for US-based traders who want the highest regulatory protection combined with deep liquidity and zero trading fees. It is particularly well-suited for serious traders who value a central limit order book, API access, and the widest variety of regulated market categories. Traders who prioritize trust and compliance over crypto-native features will find Kalshi to be the strongest option in the market.
Kalshi is the dominant prediction market platform in the United States and the clear market leader by volume, valuation, and regulatory status. Its CFTC DCM license, zero trading fees, and deep liquidity across sports, politics, economics, and weather markets make it the most complete offering available. The main limitations are its state-level availability restrictions and a mobile app that trails consumer fintech competitors in polish. For any US-based trader looking for a single, well-regulated platform to trade event contracts, Kalshi is the top recommendation.
