Compare Odds

Cross-platform price comparison. Find the best odds across Polymarket and Kalshi after checking rules, fills, and fees.

Arbitrage Opportunities

Theoretical spread before fees, fills, limits, and settlement risk

74.1% profit Buy YES on Polymarket + NO on Kalshi before execution costs

Watchlist

Polymarket

18.4% Yes

81.7% No

Trade →

Kalshi

92.5% Yes

7.5% No

Trade →

21.5% profit Buy YES on Kalshi + NO on Polymarket before execution costs

Watchlist

Polymarket

24.4% Yes

75.5% No

Trade →

Kalshi

3.0% Yes

97.0% No

Trade →

7 matched markets

Market	P Polymarket	K Kalshi	Spread	Best Price
Will JD Vance win the 2028 US Presidential Election? Match: 79%	18.4% / 81.7% Trade	92.5% / 7.5% Trade	74.1pp	ARB 74.1%
Will Gavin Newsom win the 2028 Democratic presidential nomin... Match: 85%	24.4% / 75.5% Trade	3.0% / 97.0% Trade	21.4pp	ARB 21.5%
Will Donald Trump Jr. win the 2028 Republican presidential n... Match: 89%	3.0% / 97.0% Trade	1.5% / 98.5% Trade	1.6pp	~same
Will Jamie Dimon win the 2028 US Presidential Election? Match: 96%	1.5% / 98.6% Trade	0.4% / 99.6% Trade	1.1pp	~same
Will Thomas Massie win the 2028 Republican presidential nomi... Match: 85%	1.8% / 98.2% Trade	1.5% / 98.5% Trade	0.3pp	~same
Will Thomas Massie win the 2028 US Presidential Election? Match: 97%	1.4% / 98.7% Trade	1.0% / 99.0% Trade	0.3pp	~same
Will Wes Moore win the 2028 Democratic presidential nominati... Match: 63%	1.2% / 98.8% Trade	1.4% / 98.7% Trade	0.1pp	~same

Underlined = best price for that outcome

ARB = theoretical two-sided spread before fees and fills

5pp+ = significant spread worth exploiting

~same = prices are aligned (<2pp difference)