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.
1st Half Exact Score: New York City FC 0 - 1 Atlanta United FC?
Vol $0 today · $0 total
Who will win the next New York City mayoral election?
Vol $16 today · $6.1K total
Both markets price this about the same, around 8%. They resolve on different dates (Oct 28 vs Nov 6), 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) | 8% | 9% |
| Change (24h) | -42.0 pt | +0.0 pt |
| Volume today | $0 | $16 |
| Total volume | $0 | $6.1K |
| Liquidity | $646 | — |
| Open interest | — | $4.1K |
| Resolves | 15h | 49mo |
| Tracked for | 7 hours | 19 days |
Resolution rules: read both before trusting a gap
Polymarket
In the upcoming MLS game between New York City FC and Atlanta United FC, scheduled for October 28, 2026 at 7:30 PM ET: This market will resolve based on the halftime score of the New York City FC vs. Atlanta United FC match originally scheduled for October 28, 2026 at 7:30 PM ET, considering only goals scored within the first 45 minutes of regular play plus first-half stoppage time; second-half goals, extra time, and penalty shoot-outs are excluded. If the actual halftime score is not one of the explicitly listed outcomes, the market resolves to "Any Other Score." If the match is postponed, the market will remain open until it is completed; if it is canceled with no make-up game, the market resolves to "0-0." The primary resolution source for this market is the official statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 2 hours after the event's conclusion, data from Flashscore may be used; if Flashscore data is unavailable, data from Sofascore may be used; if neither is available, a consensus of credible reporting may be used instead. All markets will settle based on the official final result as recognized by the governing body or event organizers. Revisions to officially declared final scores made after market resolution will not be accounted for …
Kalshi
If Jessica Tisch wins the next New York City mayoral election, 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.