Prediction Markets vs Sports Betting
Prediction markets and sports betting can look identical when the question is a game result — but underneath, they are built differently. A sportsbook sets the odds and takes the other side; a prediction market is an exchange where users trade against each other.
The core difference is structure
At a sportsbook, the house sets the line and profits from a built-in margin (the vig). On a prediction market, prices are set by supply and demand between traders, and the platform charges a fee instead of baking a margin into every line. That is why sharp traders often prefer the exchange model — there is no house edge on each side.
A sportsbook shows lines like +150 or −120. A prediction market shows a price like 42¢ — which roughly implies a 42% chance before fees and spreads. Same event, far clearer math. See how odds work for the full conversion.
Cash-out is built in
On most prediction markets you can sell your position before the event ends whenever there is a buyer, rather than relying on a bookmaker’s discretionary cash-out. That makes a contract a tradable asset, not a locked bet slip.
The legal line is contested
In the US the distinction is heavily debated. Kalshi operates as a CFTC-designated contract market, while some state gambling regulators have challenged sports-related event contracts. We track the current picture in our legality guide. If you’re coming from a sportsbook, our best apps for sports bettors rundown is the natural next read.