Rankings

Best for: Bettors who want visible pricing and a CFTC-overseen venue

Kalshi sells yes/no contracts that pay $1, including on sports. We checked how its fee formula compares with a sportsbook's margin, and where the legal footing is still unsettled.

Best for: Cost-aware traders who can make limit orders and read an order book

Polymarket charges takers 5% of p x (1-p) on sports and nothing on makers. We ran the fee maths against Kalshi and a standard -110 sportsbook line to see who really pays less.

Best for: Price-sensitive bettors who already compare lines across books

Novig trades sports contracts bettor-to-bettor on an order book instead of selling you a priced line. We checked what the CFTC designation changes, what it does not, and where the savings depend on liquidity.

Best for: Existing Robinhood users who want occasional event contracts

Robinhood puts event contracts, including sports, next to your stocks. We work through the reported $0.01 plus $0.01 per-contract fee and show where it beats a sportsbook margin and where it does not.

Best for: Existing Crypto.com users who want sports contracts in one account

Crypto.com Predict lists sports event contracts through a CFTC-regulated exchange. We worked through the fee formula, the cost of exiting early and who benefits if they already hold a Crypto.com account.

Best for: Existing DraftKings users who want a few event contracts in one app

DraftKings Predictions sells yes/no event contracts inside the DraftKings app. Comparison sites disagree on its fees and state map, so we set out what each claims and where Kalshi is cheaper.