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
Polymarket
Will Kamala Harris win the 2028 Democratic presidential nomination?
6%
Polymarket
Will Kamala Harris win the 2028 US Presidential Election?
4%
Polymarket
Will J.B. Pritzker win the 2028 Democratic presidential nomination?
1%
Polymarket
Will Elissa Slotkin win the 2028 Democratic presidential nomination?
0%
Polymarket
Will Andy Beshear win the 2028 Democratic presidential nomination?
3%
Polymarket
Will Zohran Mamdani win the 2028 Democratic presidential nomination?
0%
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Will Kamala Harris win the 2028 South Carolina Democratic primary?
24%
▼ 3.0pt
Vol $114 today · $2.5K total
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.