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 Republicans win the Senate race in Arizona?
36%
Kalshi
Will Republicans win the Senate race in Alaska?
63%
Kalshi
Will Republicans win the Senate race in Kansas?
77%
Kalshi
Will Republicans win the Senate race in Iowa?
63%
Kalshi
Will Republicans win the Senate race in Louisiana?
87%
Kalshi
Will Republicans win the Senate race in Arkansas?
93%
Change ×
Will the Republicans win the Maine Senate race in 2026?
38%
▼ 1.0pt
Vol $35.2K today · $1.3M total
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.