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.
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Will the Republican Party control the Senate after the 2026 Midterm elections?
33%
– 0.0pt
Vol $112.1K today · $3.7M total
Possibly the same event, on the other platform
Kalshi
Will Republicans win the Senate race in Kansas?
75%
Kalshi
Will Republicans win the Senate race in Pennsylvania?
28%
Kalshi
Will the Republican party win the House, the Republican party win the Senate, a…
13%
Kalshi
Will Republicans win the Senate race in Arizona?
26%
Kalshi
Will Republicans win the Senate race in Utah?
83%
Kalshi
Will Republicans win the Senate race in Georgia?
34%
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.