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.

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Polymarket Politics

Will Javier Milei win the 2027 Argentina presidential election?

45% ▼ 4.0pt

Vol $3.4K today · $304K total

Market B

Possibly the same event, on the other platform

Kalshi Will Michelle Bolsonaro win the 2030 Brazilian presidential election? 33% Kalshi Will Reform win the next U.K. election? 28% Kalshi Will Conservative win the next U.K. election? 20% Kalshi Will Labour win the next U.K. election? 42%

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