Polymarket vs. Kalshi
Compare markets
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?
7%
Polymarket
Will J.B. Pritzker win the 2028 Democratic presidential nomination?
1%
Polymarket
Will James Talarico win the 2028 Democratic presidential nomination?
3%
Polymarket
Will Ruben Gallego win the 2028 Democratic presidential nomination?
0%
Polymarket
Will Mark Kelly win the 2028 Democratic presidential nomination?
2%
Polymarket
Will Josh Shapiro win the 2028 Democratic presidential nomination?
6%
Change ×
Will Kamala Harris be the Democratic Presidential nominee in 2028?
8%
– 0.3pt
Vol $47.3K today · $8.6M total
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.