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.

Market A

Possibly the same event, on the other platform

Kalshi Will Josh Shapiro be the Democratic Presidential nominee in 2028? 5% Kalshi Who will win the 2028 United States vice presidential election? 4% Kalshi Will Josh Shapiro and JD Vance be the 2028 Democratic and Republican presidenti… 2% Kalshi Will Kamala Harris be first this list to declare for 2028 United States preside… 3% Kalshi Will Pete Buttigieg be first this list to declare for 2028 United States presid… 33% Kalshi Will Matthew McConaughey announce a run for President of the United States in 2… 5%

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Polymarket Politics

Will Josh Shapiro win the 2028 US Presidential Election?

3% – 0.0pt

Vol $469 today · $7.6M total

Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.