A betting exchange is a marketplace where you bet against other bettors instead of a sportsbook, and the exchange earns by matching the two sides rather than by pricing a margin into the odds. In the US that model now comes in two forms: peer-to-peer sports marketplaces like BettorEdge, where you bet in American odds against other people, and federally regulated prediction markets that sell sports event contracts priced in cents. Both remove the house as your opponent.
The main betting exchange sites open to US bettors in 2026 are BettorEdge, Novig, ProphetX, Kalshi and Polymarket US. Each is compared below, along with the crypto options and what to use if you are looking for a Fliff alternative.
How a betting exchange works
At a sportsbook, the book writes the line, takes your bet, and pays you out of its own pocket when you win. It protects itself by pricing both sides a little worse than fair, which is the vig, and by limiting customers who win too often. An exchange takes itself out of that fight. One bettor offers a price on a side, another bettor accepts the opposite side at that price, and the exchange holds both stakes until the game settles. The winner is paid from the loser's stake. The operator makes money from a commission or fee for running the market, so it does not care which side wins.
So prices come from supply and demand, you can post your own number, and a bettor who wins consistently is a good customer rather than a risk to limit. The trade-off is liquidity: your bet only fills when another person wants the other side at your price.
One bet, sportsbook vs exchange
Take a game where a sportsbook hangs both sides at -110. To win $100, you risk $110. That price implies 52.38% (110 divided by 210), so you have to win 52.38% of the time just to break even. Add both sides together and you get 104.76%, and the 4.76% above 100 is the house margin. You can check any two-sided price this way with the no-vig calculator.
On an exchange, two bettors who think the game is a coin flip can meet at even money. You take one side at +100, risking $100 to win $100, and another bettor takes the other side on the same terms. Your break-even drops to 50.00%, both sides add up to exactly 100.00%, and any fee the exchange charges is shown separately instead of being baked into the price.
The gold sliver is the 4.76% house margin. On the exchange it is gone, and any fee is charged separately.
About 2.4 points of break-even sounds small on one bet. Across a season it separates needing to be right 52.38% of the time from needing to be right half the time.
Bet the futures market against real people.
Season-long futures carry some of the fattest margins at a sportsbook. On BettorEdge you take the other side of real bettors and keep more when your call cashes.
Best betting exchange sites in the US (2026)
The US field changed more in 2026 than in any year before it. Several operators that ran sweepstakes models moved to federal regulation, and one of the original exchanges left sports betting altogether. Here is where each one stands as of September 2026.
1. BettorEdge
BettorEdge is a peer-to-peer sports betting marketplace: you bet against other real people in American odds, set your own line if you want, and there is no house on the other side. It is legal across 45+ states with ID verification built in, and it has matched over $100M in bets across 35,000+ bettors. On top of the market sit the social pieces, like competitions, leaderboards and group chats. See the full list on the features page.
2. Novig
Novig started as a peer-to-peer sports app on a sweepstakes coin model. The CFTC approved its exchange, Ludlow Exchange, as a designated contract market in June 2026, and Novig relaunched on August 4, 2026 as a federally regulated sports prediction market, retiring the sweepstakes coins. It is now an exchange for sports event contracts rather than a sweepstakes app.
3. ProphetX
ProphetX also began on a sweepstakes model. In June 2026 the CFTC approved it as both a designated contract market and a derivatives clearing organization, and it launched as a sports-focused prediction market that month, retiring the sweepstakes version. It is reported as available in every state except Nevada.
4. Kalshi
Kalshi is a CFTC-regulated exchange for event contracts across many topics, sports included. Contracts are priced in cents and pay $1 if the outcome happens. Its sports contracts are the subject of ongoing litigation, it is not available in Nevada, and a court order has required it to block sports contracts in Michigan.
5. Polymarket
Polymarket runs a CFTC-regulated US app, separate from its global crypto platform. The US app opened to all US users in May 2026 and launched with sports event contracts first.
6. Sporttrade
Sporttrade was one of the first state-licensed sports betting exchanges in the US. It closed its sports betting exchange in May and June 2026, shutting down in New Jersey on May 25 and in Arizona, Colorado, Iowa and Virginia in June, and it has applied to the CFTC to return as a prediction market. As of this writing it does not offer sports betting. For side-by-side breakdowns of these and other options, see the BettorEdge comparisons.
Is there a crypto sports betting exchange in the US?
Yes, but the crypto part is mostly about funding, not the exchange itself. The fully crypto-based exchanges, like Polymarket's international site, which settles in a dollar-backed stablecoin on the Polygon network, block US users. The US options run under CFTC rules and settle in dollars, and some accept crypto as a deposit method:
- Kalshi accepts deposits in USDC, bitcoin, Solana and other coins, converting them to US dollars for trading.
- Polymarket US, the CFTC-regulated app, takes cards, bank transfers and mobile wallets, with a crypto wallet as an optional funding route.
- Crypto.com offers sports event contracts to its US customers in many states, alongside its crypto exchange.
Offshore "bitcoin sports betting exchanges" that accept US players are not licensed in any state and offer no consumer protection if a withdrawal is refused. If your goal is fairer prices rather than paying in crypto, a regulated exchange or a peer-to-peer marketplace gets you there without that risk. The prediction markets vs betting exchanges guide explains how the two models differ.
Fliff alternatives: exchanges vs sweepstakes apps
Fliff is a social sportsbook built on a sweepstakes model: you play with Fliff Coins for fun or Fliff Cash, which can be redeemed for prizes. It is not an exchange, because you still bet against prices Fliff sets. The sweepstakes model has come under pressure in 2026, with several states banning it and others sending cease-and-desist letters, and in August 2026 a Fliff affiliate applied to register as a futures commission merchant, a step toward prediction markets that was still pending in October.
For bettors looking for sports betting apps like Fliff, the closest alternatives depend on what you liked about it:
- Real-money betting with friends and a social feed: BettorEdge, where you bet peer-to-peer in American odds with no vig built into the price, plus competitions, pick'ems and leaderboards.
- Apps like Novig: Novig and ProphetX both started on sweepstakes models and are now CFTC-regulated sports prediction markets. See the Novig alternatives and ProphetX alternatives pages.
- Trading many kinds of events: Kalshi and Polymarket US cover sports alongside economics, politics and culture.
How to pick the best betting exchange
The best betting exchange is the one where your bet actually fills at a fair price. Check three things: whether the markets you bet have enough people on the other side, whether prices are quoted in a format you can read quickly (American odds or cents per contract), and whether it is available where you live. If you want a deeper walkthrough of the model itself, the guide to peer-to-peer betting covers it.
Betting exchange FAQ
What is a betting exchange?
A betting exchange is a marketplace where bettors wager against each other instead of against a sportsbook, with the exchange matching the two sides and holding both stakes until the event settles. Because the operator earns a fee for running the market rather than profiting when you lose, there is no house margin built into the odds, and prices are set by supply and demand.
Are betting exchanges legal in the US?
Yes, betting exchanges operate legally in the US in two forms: peer-to-peer sports marketplaces such as BettorEdge, legal across 45+ states, and CFTC-regulated prediction markets such as Kalshi, Novig and ProphetX that sell sports event contracts. Availability still varies by state, and some states, including Nevada, restrict prediction market sports contracts.
What is the best betting exchange in the US?
The best betting exchange in the US is the one with enough liquidity in the markets you bet, fair pricing and availability in your state, and BettorEdge fits that for sports bettors who want American odds and a peer-to-peer market with over $100M matched across 35,000+ bettors. Prediction markets like Novig, ProphetX and Kalshi suit bettors comfortable trading contracts priced in cents.
What are the best betting exchange sites in the US?
The best betting exchange sites in the US in 2026 are BettorEdge, Novig, ProphetX, Kalshi and Polymarket US. BettorEdge is a peer-to-peer sports marketplace in American odds, while the other four are CFTC-regulated prediction markets that price sports contracts in cents. Sporttrade, once a state-licensed exchange, closed its sports betting exchange in May and June 2026.
Is there a crypto sports betting exchange in the US?
There is no fully crypto-based sports betting exchange open to US users, but some regulated US exchanges accept crypto deposits. Kalshi takes USDC, bitcoin and Solana and converts them to dollars, and Polymarket US accepts a crypto wallet as an optional funding route. Polymarket's international crypto site blocks US users, and offshore bitcoin books are not licensed in any state.
What are the best Fliff alternatives?
The best Fliff alternatives are BettorEdge for real-money peer-to-peer betting with a social feed, and Novig or ProphetX for bettors who want an app that, like Fliff, started on a sweepstakes model. Novig and ProphetX are now CFTC-regulated sports prediction markets. Fliff is a sweepstakes social sportsbook, and several states have banned that model in 2026.
The whole point of an exchange is the price: the house margin comes out and the number reflects what real bettors think. On BettorEdge community odds you bet against other people at a number you can set yourself. Open BettorEdge and get this price for real, peer-to-peer.
Bet the futures market against real people.
Season-long futures carry some of the fattest margins at a sportsbook. On BettorEdge you take the other side of real bettors and keep more when your call cashes.