Kalshi and Polymarket vs sportsbooks: the weekly report
Every week, every game an exchange and a sportsbook both price: who paid more on the moneyline, after Kalshi’s and Polymarket’s fees.
Week of Oct 27 – Nov 2, 2026: Kalshi paid more than every regulated sportsbook on 39 of 164 moneyline bets (24%) after its trading fee so far.
Week of Oct 27 – Nov 2, 2026: Polymarket paid more than every regulated sportsbook on 31 of 158 moneyline bets (20%) after its trading fee so far.
Every week
| Week | Games | Kalshi best / bets | Polymarket best / bets |
|---|---|---|---|
| Oct 27 – Nov 2, 2026 (in progress) | 131 | 39 of 164 (24%) | 31 of 158 (20%) |
How this report is built
Each game is priced once, within a day of its start, from the same feed the live Oddy board uses: every regulated US sportsbook we carry, plus Kalshi and Polymarket. For each moneyline side we take the best sportsbook price and compare it with each exchange’s price after its trading fee, because the fee is part of what you pay. A “win” means the exchange paid more than the best sportsbook on that side; ties count as no win. Only sides priced from −500 to +500 at the best sportsbook count: longer shots trade at a few cents on the exchanges, where a one-cent tick swings the comparison more than the markets do. Prices move, so this measures how the markets stood before each game, not a guarantee for the next one.
Cite this report: Oddy, “Kalshi and Polymarket vs sportsbooks: the weekly report”, https://getoddy.com/reports/kalshi-polymarket-vs-sportsbooks. Free to quote with a link.
Related: Kalshi vs sportsbooks, live · Polymarket vs sportsbooks, live · Kalshi fee calculator
Other weeks: Oct 27 – Nov 2, 2026
What is Oddy?
Oddy shows what every regulated sportsbook and prediction market pays for the same bet, ranked, with a link to the best price. Prices refresh about every minute. Free, no account, and we never sell picks.