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 Who will win the 2028 United States vice presidential election? 11% Kalshi Will Thomas Massie be the nominee for the Presidency for the Republican party? 1% Kalshi Will Pete Buttigieg be first this list to declare for 2028 United States presid… 33% Kalshi Will Gretchen Whitmer be first this list to declare for 2028 United States pres… 1% Kalshi Will Gavin Newsom be first this list to declare for 2028 United States presiden… 13% Kalshi Will Kamala Harris be first this list to declare for 2028 United States preside… 3%

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Polymarket Politics

Will Thomas Massie win the 2028 US Presidential Election?

1% – 0.0pt

Vol $44 today · $8.6M total

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