Prediction markets
Kalshi vs Polymarket: today's sports prices
The same game often costs a different amount on each exchange. Here's every side listed on Kalshi and at least one other exchange today (Polymarket, Novig or ProphetX), compared after each exchange's fee, so you know where to buy. Updated every few minutes.
No game is listed on Kalshi and another exchange right now. Check back closer to game time.
Cheaper isn't the same as underpriced
Both exchanges can be too expensive at once. Pro compares each price with the sportsbooks' fair odds and alerts you when either exchange sells a team below what it's worth.
How the comparison works
Prices
We use the price you'd pay to buy each side right now (the ask) on both exchanges. A 60¢ contract pays $1 if that team wins.Fees
Kalshi and Polymarket charge roughly 7% × price × (1 − price) per contract, highest near 50¢ (Polymarket US's rate is slightly lower). Novig charges no fee to buy. ProphetX takes up to 2% of your net winnings; we assume 2%. The "Cheapest on" column already includes every fee, and its number is how much cheaper it is than the next exchange.Why prices differ
They're separate markets with different traders. A dash means that exchange doesn't list the game (or the price isn't in yet). News, big orders and thin late-night books move one before the other, so gaps of a few cents are common.Before you buy
Prices change by the minute and the cheapest price may only cover a few contracts. Check the live price on the exchange, and see our combo checker before buying parlays.Not affiliated with Kalshi, Polymarket, Novig or ProphetX. Novig and ProphetX prices come from The Odds API and can lag a few minutes. For information only, not financial advice. 21+.