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 Democratic Party win the popular vote in the 2026 U.S. House of Representatives midterm elections by between 14% and 16%?
19%
▼ 1.4pt
Vol $16.5K today · $43.1K total
Possibly the same event, on the other platform
Kalshi
Will the Democratic Party win the 2028 Washington House District 14, Position 1…
73%
Kalshi
Will the Democratic Party win the 2028 Washington House District 14, Position 2…
73%
Kalshi
Will the Democratic Party win the 2028 Washington House District 16, Position 1…
11%
Kalshi
Will the Democratic Party win the 2028 Washington House District 16, Position 2…
11%
Kalshi
Will the Democratic Party win the 2028 West Virginia House of Delegates Distric…
4%
Kalshi
Will the Democratic Party win the 2028 West Virginia House of Delegates Distric…
4%
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.