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
Kalshi
Will Cory Booker be the Democratic Presidential nominee in 2028?
1%
Kalshi
Will J.B. Pritzker be the Democratic Presidential nominee in 2028?
3%
Kalshi
Will James Talarico be the Democratic Presidential nominee in 2028?
3%
Kalshi
Will Gretchen Whitmer be the Democratic Presidential nominee in 2028?
1%
Kalshi
Will Gavin Newsom be the Democratic Presidential nominee in 2028?
18%
Kalshi
Will Kamala Harris be the Democratic Presidential nominee in 2028?
8%
Change ×
Will Cory Booker win the 2028 Democratic presidential nomination?
1%
– 0.1pt
Vol $177.1K today · $26.5M total
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.