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Prediction Market Arb Scanner
Find risk-free spreads across Polymarket, Kalshi & PredictIt
Scans Polymarket, Kalshi, and PredictIt for the same market and flags price gaps where buying YES on one and NO on the other locks in guaranteed profit. Matching is frequency-weighted, not naive overlap, so it will not confuse candidates in the same race.
Hey Product Hunt 👋
I've been running prediction-market tools on Apify for a while now (a Polymarket scraper and a 2-platform arb finder), and kept noticing PredictIt was the obvious third leg nobody had wired in — it's US-only, no auth required, and often prices things differently than Polymarket or Kalshi.
The harder problem turned out to be matching: naive keyword overlap confidently matches the wrong candidate in a multi-way race, or the wrong side of a two-party question, and produces fake "arbitrage" that's really just a bad pairing. Fixed that with frequency-weighted matching so a candidate's actual name counts far more than words every market in that race shares.
Would love feedback, especially from anyone already trading across these platforms — tell me where the matching gets it wrong and I'll tighten it up.
About Prediction Market Arb Scanner on Product Hunt
“Find risk-free spreads across Polymarket, Kalshi & PredictIt”
Prediction Market Arb Scanner was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #134 on the daily leaderboard. Scans Polymarket, Kalshi, and PredictIt for the same market and flags price gaps where buying YES on one and NO on the other locks in guaranteed profit. Matching is frequency-weighted, not naive overlap, so it will not confuse candidates in the same race.
On the analytics side, Prediction Market Arb Scanner competes within API, Fintech and Artificial Intelligence — topics that collectively have 622.5k followers on Product Hunt. The dashboard above tracks how Prediction Market Arb Scanner performed against the three products that launched closest to it on the same day.
Who hunted Prediction Market Arb Scanner?
Prediction Market Arb Scanner was hunted by Max Galli. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Reviews
Prediction Market Arb Scanner has received 8 reviews on Product Hunt with an average rating of 5.00/5. Read all reviews on Product Hunt.
For a complete overview of Prediction Market Arb Scanner including community comment highlights and product details, visit the product overview.
Max Galli