Prediction markets let you buy YES or NO shares on an outcome, each priced between $0 and $1. When the same event is listed on both Polymarket and Kalshi, the prices sometimes differ. If you buy YES on one platform and NO on the other, and your total cost is under $1.00, you’re guaranteed a profit — because no matter what happens, one of your positions pays out $1. For example: YES costs 52¢ on Polymarket and NO costs 44¢ on Kalshi. Your total cost is 96¢. Regardless of the outcome, you receive $1 back — a guaranteed 4¢ profit per share.

We scan Polymarket and Kalshi in real time, match equivalent markets using AI-powered text analysis, and calculate the price spread. When we find a mismatch, we show you exactly where to buy on each platform.

Pro subscribers get 15-second updates sourced directly from each platform's API. Free tier data refreshes every 15 minutes.

Whale tracking monitors large trades across both platforms in real time. Each trade gets a whale score based on its size relative to typical activity. Repeat whales (same wallet, multiple large trades) are flagged so you can follow smart money.

No. Polshi is an informational tool that displays publicly available price data. Nothing on this site constitutes financial, investment, or trading advice. Always do your own research.

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