What the table tells you
- Seven apps run their own book. Kalshi, Polymarket US, polymarket.com, Gemini, Crypto.com, Interactive Brokers (through ForecastEx) and PredictIt. Everything else is a front end to one of them or to CME Group.
- Kalshi sits behind three other apps. Robinhood, Coinbase and Underdog all name Kalshi as an exchange they send orders to.
- Crypto.com's exchange sits behind three more. FanDuel Predicts, Fanatics Markets and Robinhood all name it.
- Fees come in two shapes. Exchanges charge a rate times price times one minus price, which peaks at 50 cents and shrinks toward 1 and 99 cents. Brokers charge flat cents per contract or a cut of the payout.
- Only the exchanges publish an API. Bots, terminals and trackers all plug into exchange accounts.
The verdict on each app
Kalshi
The default choice in the US. Kalshi is a CFTC designated contract market with its own clearinghouse, and it lists the widest catalogue in one account: game lines, player props, season futures and combos across every major league, plus politics, Fed decisions, CPI, crypto and weather. Takers pay 0.07 x C x P x (1 - P), $1.75 on 100 contracts at 50 cents. Resting orders pay nothing on most markets. Kalshi has a public API, a demo exchange with test money and official SDKs, which is why most bots and tools start there. Court orders limit sports and some other categories in Nevada, Michigan and Washington. Read our Kalshi review and is Kalshi legit.
Polymarket US
The Polymarket app for US residents. Polymarket US is a CFTC-regulated exchange and clearinghouse that trades in dollars, separate from polymarket.com in every way: account, balance, order book and rules. Takers pay 0.0695 x C x P x (1 - P), a cent less than Kalshi on 100 contracts at 50 cents. Makers get paid: a rebate at a 0.0125 rate on every fill. Combos run from 2 to 10 legs. Eligibility is checked state by state inside the app, and Polymarket US publishes no state list. It is the right second account for anyone who posts limit orders. More in our Polymarket review.
polymarket.com
The largest market outside the US. polymarket.com is a crypto exchange: you deposit from a wallet, hold your own balance on Polygon and withdraw to any wallet for free. Taker rates run from 0 to 0.07 by category, with politics at 0.04 and geopolitics free. Makers pay nothing and earn a share of taker fees. Every trade names a wallet, so every trader's full record is public, and no other app here matches that for research. polymarket.com holds no CFTC license and takes no new positions from the US, the UK, France, Germany, Australia or Singapore. Disputed markets go to a token-holder vote that takes four to six days.
Robinhood
The easiest on-ramp for the millions who already have the app. Robinhood Derivatives is a broker that sends orders to Kalshi, ForecastEx, Rothera and Nadex. Its commission is k x P x (1 - P) per contract, with k at 10% or 5% for Gold members, capped at 1 cent, plus an exchange fee of up to 1 cent. Orders are limit orders in the mobile app only. Maryland and Nevada get no sports contracts, and Michigan customers cannot open new sports positions. Robinhood publishes no API for event contracts. Fees, payouts and the Kalshi comparison are in Robinhood prediction markets.
DraftKings Predictions
A separate product from DraftKings Sportsbook, built for customers DraftKings already has. It lists event contracts on sports, financial markets and other events through partner exchanges, beginning with CME Group. DraftKings also owns Railbird, a prediction market platform it acquired. Its terms list a 1 cent transaction fee on every contract bought or sold, plus a separate fee from the exchange that lists the market. What you can trade changes with where you stand: DraftKings sorts states into all markets, financial only, no sports and none, and blocks tribal land. DraftKings publishes no API. Pick it for convenience if your money already lives there.
FanDuel Predicts
FanDuel's event contract app, built with CME Group. Financial benchmark contracts on the S&P 500, the Nasdaq-100, oil, gold, crypto and economic data are open in all 50 states. Sports and entertainment contracts, including combos listed on Crypto.com's exchange, are offered only in states where FanDuel runs no sports betting. FanDuel's site lists the fee as 2 cents per dollar of potential payout, charged when you buy and again if you cash out early. On 100 contracts that is $2.00 at any price. It suits FanDuel customers in states with no sportsbook.
Coinbase
Kalshi's markets inside the Coinbase app. Coinbase's help center says its prediction markets are operated by Kalshi and offered through Coinbase Financial Markets, a registered futures commission merchant, to US residents outside Nevada. You buy with settled US dollars or USDC. Coinbase honors Kalshi's resolution on every market. The fee is shown on the order confirmation and covers the exchange and Coinbase's broker fee. Coinbase publishes no fee schedule and no trading API for these contracts. Pick it if you already hold USDC on Coinbase and want to put it to work on events. Open a Kalshi account instead if you want resting orders priced by a published formula.
Gemini Predictions
A full exchange from a crypto company. Gemini Titan holds a CFTC designated contract market license, and an affiliate clears the trades, so Gemini runs its own book from order to settlement. Contracts are funded from your Gemini account and cover crypto, sports and politics. The fee formula matches Kalshi's: 0.07 x C x P x (1 - P) for takers and 0.0175 for makers. It is open to US residents 18 and older, with availability varying by location. Rivo connects to it with your own API key, so a Gemini account trades from the same terminal as Kalshi. It is a strong pick for existing Gemini customers.
Crypto.com
An exchange owner with wide distribution. Prediction trading in the Crypto.com app runs on Crypto.com Derivatives North America, a CFTC-regulated exchange and clearinghouse that also powers contracts on FanDuel Predicts and Fanatics Markets. Its help center lists a taker fee of 0.07 x C x P x (1 - P) and a maker fee of 0.0175 on sports and event singles, and 2 cents a contract on crypto, FX, commodity and index contracts. Market orders fill immediately with a price limit, and limit orders rest. Positions are fully collateralized from a US dollar account. Crypto.com says the product is for the United States only and publishes no state list or trading API on that page.
Interactive Brokers ForecastTrader
The pick for macro traders. ForecastTrader is the Interactive Brokers screen for ForecastEx, its affiliated exchange, and for CME event contracts. The catalogue leans on economic data, climate and elections, with election contracts limited to eligible US residents. Interactive Brokers' pricing page lists no commission and a 1 cent exchange fee per contract, the simplest fee on this page. Holders also earn incentive coupons while a position stays open. Contracts trade through the same API as the rest of an Interactive Brokers account. Sports traders will find little here. Someone who already runs a portfolio at Interactive Brokers gets event contracts beside it.
Fanatics Markets
A sports brand's broker app. Fanatics Markets is run by Morton St. Trading Investments, a CFTC-registered futures commission merchant, and offers contracts through Crypto.com Derivatives North America. Its fee schedule lists a total trading fee from $0.00034 to $0.02 per contract, highest near 50 cents and rounded up to the cent per order. ACH deposits and withdrawals are free. Card, Apple Pay, PayPal and Venmo deposits cost up to 2%. Its availability page lists 22 states, including California, Texas and Florida, and 4 US territories. Fanatics has announced a deal to buy its own exchange and clearinghouse.
Underdog
Prediction markets inside a fantasy app. Underdog's rules say trades are placed by UDM, a CFTC-registered futures commission merchant, on Kalshi and other CFTC-registered exchanges. Contracts are priced by probability, and exchange fees apply on top; its help center example uses 2 cents a contract. You must be 18 or older and physically located in an eligible state when you trade. Arizona, Michigan, Nevada and New York are excluded. The menu is sports and culture, with combos. It fits a fantasy player who wants player markets in an app they already know.
PredictIt
The original US politics market, still open. PredictIt operates as a not-for-profit research market under CFTC no-action relief, with a limit on how much one trader can put in a single contract. It lists politics only. PredictIt takes 10% of profits, and its site says deposits and withdrawals are now free. It publishes a public market data feed. A 10% cut of the profit on a contract bought at 50 cents comes to 5 cents a contract. It suits a politics trader with small stakes who wants markets the bigger exchanges skip.
Which app should you pick
You bet on sports
Kalshi first. It lists the most leagues and the most ways to trade a game, at exchange fees, with free resting orders on most markets. Polymarket US is the second book to check for a better price. If your state limits sports on those, DraftKings Predictions, FanDuel Predicts, Fanatics Markets and Underdog each publish their own state rules. Check your state on the prediction market access map.
You trade politics and macro
Kalshi for the widest economics menu: Fed decisions, CPI, jobs and GDP. Polymarket US if you post limit orders and want the rebate. Interactive Brokers if you want economic contracts beside a brokerage portfolio at 1 cent a contract. Outside the US, polymarket.com has the deepest politics books and free geopolitics markets. Live odds on the biggest events across venues are on the market pages.
You are crypto native
Outside the US: polymarket.com, funded from your own wallet with self custody. Inside the US: Gemini Predictions or Crypto.com if your balance already sits there, and Coinbase if you want to buy Kalshi contracts with USDC. Kalshi and Polymarket US both list 15 minute crypto markets.
You want automation or an API
Kalshi. A public API, a demo exchange and official SDKs make it the easiest place to run a bot. Polymarket US, polymarket.com and Gemini also take orders through your own keys or wallet. None of the broker apps publish a trading API for event contracts. Start with the Kalshi API guide, or skip the code and build a bot in Rivo.
You live outside the US
polymarket.com in most countries, and Kalshi in most countries outside its list of 55. Interactive Brokers offers ForecastEx contracts to eligible clients of some of its international entities. Most other apps on this page are for US residents only. Each venue enforces its own restricted list.
You want everything in one familiar login
Robinhood if you hold stocks there. Coinbase if you hold crypto there. Both put Kalshi contracts beside what you already own. You trade a narrower set of order types, and you pay the broker on top of the exchange. The full comparison of the two biggest exchanges is in Kalshi vs Polymarket.
The terminal on top of the apps
An app is where your account lives. A terminal is where you decide what to trade. Rivo is the prediction market terminal: it connects Kalshi, Polymarket, Polymarket US and Gemini in one screen and ingests every market and every trade on all four.
- Every market and trade. One search across four venues, each market with its venue's own order book. Live shows what traders in profit are buying, and Market Moves shows what just moved.
- Trader research. Ranked traders on Kalshi and Polymarket, scored on settled markets, each with a profit curve, win rate against the odds paid and open positions.
- Alerts. Follow a trader or watch a market and get the alert on your phone, your computer or Telegram.
- Bots. Copy a trader, run a signal or watch one market's price. Backtest first, run on paper, then go live on Kalshi, Polymarket US and Gemini through your own account inside per-trade and per-day limits.
- Paper trading. Place any order on paper against the venue's live book, by hand or by bot, with no venue account.
- One ticket and one portfolio. The order ticket shows each venue's exact fee before you send. Positions from every connected account sit in one portfolio.
The whole terminal costs $9 a week or $15 a month. Rivo is not an exchange and holds no customer funds. Orders go through your own account on each venue, and venue fees go to the venue. Rivo connects to the four exchanges with an API or wallet: it does not connect to Robinhood, Coinbase, DraftKings, FanDuel or the other broker apps. See how it fits together in the prediction market terminal.
Frequently asked questions
What is the best prediction market app?
Kalshi for most US traders: the widest sports lineup, its own exchange, resting orders free on most markets and a public API with a demo exchange. Outside the US, polymarket.com: self custody, the lowest politics fees and free geopolitics markets. Polymarket US is the second US pick for traders who post limit orders.
What are the best prediction market apps in the US?
Kalshi, Polymarket US and Gemini Predictions run their own CFTC-regulated exchanges. Robinhood, Coinbase, DraftKings Predictions, FanDuel Predicts, Fanatics Markets and Underdog are brokers that send orders to an exchange. Crypto.com and Interactive Brokers trade on exchanges they are affiliated with.
Which prediction market apps have their own order book?
Kalshi, Polymarket US, polymarket.com, Gemini Predictions, Crypto.com (through Crypto.com Derivatives North America), Interactive Brokers (through ForecastEx) and PredictIt. Robinhood, Coinbase, DraftKings Predictions, FanDuel Predicts, Fanatics Markets and Underdog route orders to another company's exchange.
Does DraftKings have prediction markets?
Yes. DraftKings Predictions is a standalone product with event contracts on sports, financial markets and other events. DraftKings' terms list a 1 cent transaction fee per contract plus a separate exchange fee. Which markets you see changes with the state you are standing in.
Does FanDuel have prediction markets?
Yes. FanDuel Predicts lists financial benchmark contracts in all 50 states through CME Group, and sports and entertainment contracts in states where FanDuel offers no sports betting. FanDuel's site lists a fee of 2 cents per dollar of potential payout.
Does Coinbase have prediction markets?
Yes. Coinbase's help center says its prediction markets are operated by Kalshi and offered by Coinbase Financial Markets to US residents outside Nevada. You buy contracts with settled US dollars or USDC, and the order confirmation shows the fee before you submit.
Is there a Polymarket app for the US?
Yes. Polymarket US is a CFTC-regulated exchange and clearinghouse with its own app, trading in dollars. It is a separate business from polymarket.com, which does not accept new positions from US users.
Is Kalshi or DraftKings better for prediction markets?
Kalshi, for anyone who trades often. Kalshi is the exchange, lists every category in one place, charges nothing for resting orders on most markets and has a public API. DraftKings Predictions suits an existing DraftKings customer who wants event contracts beside the products they already use.
Which prediction market app has the lowest fees?
For resting orders: Polymarket US and polymarket.com, which pay makers a rebate, then Kalshi, where most markets charge makers nothing. For flat pricing: Interactive Brokers lists 1 cent a contract in exchange fees and no commission on ForecastEx contracts. polymarket.com charges no fee at all on geopolitics markets.
Can one app trade Kalshi and Polymarket together?
Rivo does. Rivo is the prediction market terminal for Kalshi, Polymarket, Polymarket US and Gemini: one market search, one order ticket, one portfolio, plus trader research, alerts and bots, for $9 a week or $15 a month. Orders go through your own account on each venue.