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 Donald Trump win the 2028 Republican presidential nomination?
2%
Polymarket
Will Eric Trump win the 2028 Republican presidential nomination?
0%
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 Donald Trump Jr. win the 2028 US Presidential Election?
1%
Change ×
Will Donald J. Trump Jr. be the nominee for the Presidency for the Republican party?
3%
– 0.0pt
Vol $1K today · $3M total
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.