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
Polymarket
Will the Republicans win the Mississippi Senate race in 2026?
1%
Polymarket
Will the Democrats win the Mississippi Senate race in 2026?
99%
Polymarket
Will J.D. Vance win the 2028 Republican presidential nomination?
32%
Polymarket
Will Mary Peltola win the Alaska Senate race in 2026?
98%
Polymarket
Will Tulsi Gabbard win the 2028 Republican presidential nomination?
0%
Polymarket
Will Dan Sullivan win the Alaska Senate race in 2026?
2%
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.