Polymarket vs. Kalshi
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See where the two biggest prediction markets disagree. Pick any two markets, or start from the biggest gaps below: prices, volume, history and the resolution rules, side by side.
Will Jon Ossoff win the 2028 South Carolina Democratic primary?
Vol $0 today · $1.4K total
Polymarket is 27 points higher than Kalshi (40% vs 13%). They resolve on different dates (Oct 24 vs Nov 7), so they may not be exactly the same bet.
History starts when we first saw each market, so a newly added market has a short line.
| Polymarket | Kalshi | |
|---|---|---|
| Probability (Yes) | 40% | 13% |
| Change (24h) | +0.0 pt | +0.0 pt |
| Volume today | $0 | $0 |
| Total volume | $0 | $1.4K |
| Liquidity | $3.1K | — |
| Open interest | — | $1.2K |
| Resolves | — | 25mo |
| Tracked for | 6 days | 19 days |
Resolution rules: read both before trusting a gap
Polymarket
In the second half of the college football game between Tennessee and South Carolina, scheduled for October 24 at 3:30 PM ET: This market will resolve to "South Carolina" if South Carolina outscore Tennessee by 3 or more points in the second half. Otherwise, this market will resolve to "Tennessee". Points scored in the second half and in any overtime count toward this market. First-half points are not included. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50.
Kalshi
If Jon Ossoff wins the 2028 South Carolina Democratic primary, then the market resolves to Yes.
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Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.