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 Republicans win the Alaska, Iowa, Kansas, Maine, Michigan, Ohio, and Texas…
12%
Polymarket
Will Republicans lose the Alaska, Iowa, Kansas, Maine, Michigan, Ohio, and Texa…
24%
Polymarket
Will the Republican Party control the Senate after the 2026 Midterm elections?
34%
Polymarket
Will the Republicans win the Texas Senate race in 2026?
33%
Polymarket
Will J.D. Vance win the 2028 Republican presidential nomination?
39%
Change ×
Will Chuck Grassley be the Republican nominee for the Senate in Iowa?
38%
– 0.5pt
Vol $23 today · $662 total
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.