Polymarket vs. Kalshi
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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 Florida?
85%
Kalshi
Will Republicans win the Senate race in Iowa?
63%
Kalshi
Will Republicans win the Senate race in North Carolina?
35%
Kalshi
Will Republicans win the Senate race in North Dakota?
85%
Kalshi
Will the Republican party win the Senate in 2028?
45%
Kalshi
Will the Republican party win the House, the Republican party win the Senate, a…
13%
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Will the Republicans win the Idaho Senate race in 2026?
97%
▲ +7.3pt
Vol $52.8K today · $253.4K total
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.