Arbitrage Scanner
Real-time cross-platform spread detection across Kalshi, Polymarket, PredictIt, Limitless, and Futuur.
Cross-Platform Arbitrage Scanner
Real, live contracts matched across Kalshi, Polymarket, PredictIt, Limitless, and Futuur, ranked by net edge after each platform's real trading fees — a wide raw spread that costs more in fees than it pays isn't a real opportunity.
How this works
Matches US election races by state and race type, BTC/ETH threshold markets by strike price and close time, Fed rate-decision markets by meeting and direction, season-long sports championship futures, single-game moneylines by real team identity (both the team and its opponent, not just a shared keyword) and close time, and Oscar nominee win markets by category and nominee. Manifold Markets is shown for comparison but excluded from the money math — it's play-money, not a real financial edge. Coverage is inherently limited to contracts confidently matched as the same real-world event — a short list reflects real current overlap, not a broken feature.
Real Executable Edge, shown when both legs have a live order-book quote, is the actual cost of buying Yes on the cheaper platform and No on the dearer one right now — the raw spread and net edge use each platform's single quoted price, which can look wider than what the real bid/ask spread would actually let you capture.
Futuur charges a real per-market fee (its own API reports 4-6%, verified live) this app doesn't yet have a field to read per contract — rather than guess a number, any match with a Futuur leg is shown without the "real opportunity" mark, even when Net Edge is positive, and its own row is flagged. Smarkets has the same gap.