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 Republicans win the South Carolina Senate race in 2026?
82%
– 0.5pt
Vol $29.4K today · $369.8K total
Possibly the same event, on the other platform
Kalshi
Will Republicans win the Senate race in Ohio?
54%
Kalshi
Will Republicans win the Senate race in Idaho?
89%
Kalshi
Will Republicans win the Senate race in Wisconsin?
37%
Kalshi
Will Republicans win the Senate race in Arizona?
25%
Kalshi
Will Republicans win the Senate race in Kansas?
73%
Kalshi
Will Republicans win the Senate race in Utah?
83%
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.