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 Republicans win the Senate race in South Carolina?
Vol $0 today · $5.5K total
Kalshi is 48 points higher than Polymarket (81% vs 33%). 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) | 33% | 81% |
| Change (24h) | -5.5 pt | +0.0 pt |
| Volume today | $0 | $0 |
| Total volume | $0 | $5.5K |
| Liquidity | $3.5K | — |
| Open interest | — | $1.9K |
| Resolves | — | 37mo |
| Tracked for | 5 days | 18 days |
Resolution rules: read both before trusting a gap
Polymarket
In the upcoming college football game, scheduled for October 24 at 3:30 PM ET: This market will resolve to "Over" if Tennessee and South Carolina combine to score 58 or more points in this game. If the combined total is less than 58, this market will resolve to "Under". 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 a representative of the Republican party is sworn in as a Senator of South Carolina for the term beginning in 2029, 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.