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 US Presidential Election?
4%
Polymarket
Will Ted Cruz win the 2028 US Presidential Election?
1%
Polymarket
Will Gavin Newsom win the 2028 US Presidential Election?
9%
Polymarket
Will Thomas Massie win the 2028 US Presidential Election?
1%
Polymarket
Will Kamala Harris win the 2028 Democratic presidential nomination?
7%
Polymarket
Will Marco Rubio win the 2028 US Presidential Election?
9%
Change ×
Will Kamala Harris be first this list to declare for 2028 United States presidential election before Nov 7, 2028?
3%
▼ 1.9pt
Vol $5 today · $15.7K total
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.