Same event, two platforms, different prices. Buy cheap, sell expensive. Profit locked in — whatever the outcome.
Polymarket and Kalshi both let you trade on real-world events — elections, interest rates, crypto prices, geopolitics. But they are independent markets, so the same event often trades at different prices on each. PolyArbitrage finds those gaps and lets you buy on the cheap side and sell on the expensive side — locking in profit guaranteed by math, regardless of what actually happens.
Prediction markets often disagree. By taking opposite positions on two platforms, you lock in a guaranteed payout regardless of the event outcome.
Live market data from Polymarket's API — sorted by volume. Tap any market to see cross-platform details.
Opportunities built from live Polymarket prices vs. estimated Kalshi counterparts. Net edges after fees.
Calculate net profit with separate buy-side and sell-side fees.