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
Who will win the 2028 United States vice presidential election?
4%
Kalshi
Will Marco Rubio be the nominee for the Presidency for the Republican party?
18%
Kalshi
Will Kamala Harris be first this list to declare for 2028 United States preside…
3%
Kalshi
Will Pete Buttigieg be first this list to declare for 2028 United States presid…
33%
Kalshi
Will Donald Trump endorse Marco Rubio in the 2028 presidential election before …
26%
Kalshi
Will Marco Rubio be the nominee for the Vice Presidency for the Republican part…
27%
Change ×
Will Marco Rubio win the 2028 US Presidential Election?
9%
▼ 0.6pt
Vol $7.8K today · $13M total
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.