Launching today
ArbTrader
Kalshi & Polymarket arbitrage, found 0.3s after prices move
2 followers
Kalshi & Polymarket arbitrage, found 0.3s after prices move
2 followers
ArbTrader checks 40,000+ prediction-market events on Kalshi, Polymarket and Polymarket US and shows only the trades that still profit after every fee: buy every side for under $1, get $1 back whoever wins. Plus a whale tracker with copy trading, an AI analyst that researches any market from a screenshot, and free side-by-side Kalshi vs Polymarket odds. Free to watch; Quant is $1 for 3 days.
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Launch Team
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Promoted
Hi Product Hunt! ArbTrader started from a simple observation: Kalshi and Polymarket often list the same question at different prices. When buying opposite sides costs less than $1 after fees, you get $1 back whoever wins.
What it does:
- Matches the same market across Kalshi, Polymarket and Polymarket US (by title, dates and rules) across 40,000+ events
- Re-prices a spread about 0.3 seconds after the prices move, after every fee, at the size actually for sale
- Alerts by push, Discord or email, plus order tickets you confirm
- A whale tracker with copy trading, and an AI analyst that researches any market from a screenshot
- Free side-by-side odds pages: arbtrader.co/odds
The honest part: spreads are small and close fast, a leg can fail to fill, and two sites can settle a question differently. We show all of that instead of hiding it.
Free to watch; Quant is $1 for 3 days. Feedback we'd love: which markets or venues should we add next, and what would make you trust a spread enough to take it?