Polymarket vs. Kalshi
Compare markets
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.
Possibly the same event, on the other platform
Kalshi
Will Marco Rubio be the nominee for the Presidency for the Republican party?
18%
Kalshi
Will Marco Rubio be the nominee for the Vice Presidency for the Republican part…
27%
Kalshi
Will Alexandria Ocasio-Cortez and Marco Rubio be the 2028 Democratic and Republ…
8%
Kalshi
Will JD Vance and Marco Rubio be the 2028 Republican Presidential ticket?
30%
Kalshi
Will Republican win the Presidency in 2028?
41%
Kalshi
Will J.D. Vance be the nominee for the Presidency for the Republican party?
43%
Change ×
Will Marco Rubio win the 2028 Republican presidential nomination?
13%
– 0.2pt
Vol $1.6K today · $10.8M total
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.