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 there be a Hormuz agreement by October 23, oil below $80, and the Democrats win the Senate?

3% ▼ 0.9pt

Vol $6.7K today · $65.4K total

Market B

Possibly the same event, on the other platform

Kalshi Will the Democratic party win the Senate in 2028? 54% Kalshi Will the Democratic party win the House, the Democratic party win the Senate, a… 48% Kalshi Will Democrats win the Senate race in Pennsylvania? 69%

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