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
Polymarket
Will J.D. Vance win the 2028 Republican presidential nomination?
39%
Polymarket
Will Elon Musk win the 2028 Republican presidential nomination?
1%
Polymarket
Will John Thune win the 2028 Republican presidential nomination?
0%
Polymarket
Will Vivek Ramaswamy win the 2028 Republican presidential nomination?
0%
Polymarket
Will Marco Rubio win the 2028 Republican presidential nomination?
18%
Polymarket
Will JD Vance win the 2028 US Presidential Election?
18%
Change ×
Will the Republican candidate win the 2028 presidential election by 1 to 10 Electoral College votes?
4%
– 0.0pt
Vol $2 today · $2.9K total
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.