Polymarket vs. Kalshi
Compare markets
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 Kamala Harris win the 2028 South Carolina Democratic primary?
Vol $114 today · $2.5K total
Polymarket is 11 points higher than Kalshi (35% vs 24%). 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) | 35% | 24% |
| Change (24h) | +0.0 pt | -3.0 pt |
| Volume today | $0 | $114 |
| Total volume | $0 | $2.5K |
| Liquidity | $1.1K | — |
| Open interest | — | $1.5K |
| Resolves | — | 25mo |
| Tracked for | 4 days | 17 days |
Resolution rules: read both before trusting a gap
Polymarket
In the upcoming college football game between Tennessee and South Carolina, scheduled for October 24 at 3:30 PM ET: This market will resolve to "Over" if South Carolina record more than 3.5 total touchdowns in this game. This market will resolve to "Under" if South Carolina record 3.5 or fewer total touchdowns in this game. Where multiple lines are offered as a group, each line resolves independently. Overtime is included if played. 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 Kamala Harris wins the 2028 South Carolina Democratic primary, then the market resolves to Yes.
Share this comparison
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.