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 Democrats win the Ohio Senate race in 2026?
66%
▲ +2.0pt
Vol $33.8K today · $754.6K total
Possibly the same event, on the other platform
Kalshi
Will the Democratic party win the House, the Democratic party win the Senate, a…
49%
Kalshi
Will Republicans win the Senate race in Arizona?
25%
Kalshi
Will Democratics win the Senate race in Kansas?
26%
Kalshi
Will Democratics win the Senate race in Arizona?
74%
Kalshi
Will Republicans win the Senate race in Pennsylvania?
25%
Kalshi
Will Democratics win the Senate race in North Carolina?
64%
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.