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 Donald Trump Jr. win the 2028 Republican presidential nomination?
2%
Polymarket
Will J.D. Vance win the 2028 Republican presidential nomination?
47%
Polymarket
Will Ivanka Trump win the 2028 Republican presidential nomination?
1%
Polymarket
Will Robert F. Kennedy Jr. win the 2028 Republican presidential nomination?
0%
Polymarket
Will Doug Burgum win the 2028 Republican presidential nomination?
0%
Polymarket
Will Elon Musk win the 2028 Republican presidential nomination?
0%
Change ×
Will JD Vance and Donald Trump Jr. be the 2028 Republican Presidential ticket?
4%
– 0.0pt
Vol $398 today · $3.8K total
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.