Where Kalshi and Polymarket disagree, right now.
Every market listed on both exchanges, matched outcome by outcome. Refreshed every 45 seconds.
A price is the market's chance the outcome happens: 62¢ means 62%. The gap is the difference between the two venues in points (pp): 50¢ vs 45¢ is a 5 pp gap. Switch to US odds above for bookmaker-style numbers.
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How to read it
Each line is one event priced on both exchanges. The track shows where each venue puts the favorite, Kalshi in teal, Polymarket in violet, and the gap between them in percentage points. Positive means Kalshi is higher. Expand a line for every outcome, the fee-adjusted cross-venue edge, and the price history.
What the edge means
Buy one side on one venue and the other side on the other, both at the ask. Edge is $1 minus total cost minus taker fees, Kalshi ⌈0.07·P·(1−P)⌉ per contract and Polymarket 0.05·P·(1−P) on sports. Resting orders on Kalshi sports markets are free, so real edges can be better than shown.
What this is not
Read-only. Nothing here places or routes orders and nothing is advice. Polymarket prices come from the live order book, Kalshi from its public API. Thin books and near-certain favorites are hidden by default because their gaps are rounding, not disagreement. Links to the exchanges may be referral links; that never affects what is shown. Full disclosures.