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.
Possibly the same event, on the other platform
Kalshi
Will Reform win the next U.K. election?
28%
Kalshi
Will Conservative win the next U.K. election?
20%
Kalshi
Will Labour win the next U.K. election?
42%
Kalshi
Will the Republican party win the House in 2030?
48%
Kalshi
Will the Democratic party win the House in 2030?
52%
Kalshi
Will the Republican party win the Senate in 2030?
42%
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.