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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Will Jon Ossoff and Marco Rubio be the 2028 Democratic and Republican presidential nominees?
4%
– 0.0pt
Vol $17 today · $17K total
Possibly the same event, on the other platform
Polymarket
Will Jon Ossoff win the 2028 Democratic presidential nomination?
14%
Polymarket
Will Marco Rubio win the 2028 Republican presidential nomination?
15%
Polymarket
Will Jon Stewart win the 2028 Democratic presidential nomination?
1%
Polymarket
Will J.D. Vance win the 2028 Republican presidential nomination?
44%
Polymarket
Will J.B. Pritzker win the 2028 Democratic presidential nomination?
1%
Polymarket
Will Tim Scott win the 2028 Republican presidential nomination?
0%
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.