Best Polymarket Arbitrage Bot in 2026
Cross-venue arbitrage between Polymarket, Kalshi, and Limitless consistently produces 1-5% edges on the same underlying event. PredictEngine's arbitrage scanner monitors all three venues in real time, flags mispricings above your minimum-edge threshold, and auto-executes both legs simultaneously — locking in the spread before the market re-prices.
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Frequently Asked Questions
What is prediction market arbitrage?
It's buying YES on one venue and NO on another (or the same outcome at different prices) so that any resolution returns more than your combined cost. Risk-free profit when executed simultaneously.
How big are arbitrage edges between Polymarket, Kalshi, and Limitless?
Typical edges range from 1% to 5%, with larger spreads (10%+) appearing during fast-moving news events when one venue's liquidity lags the others.
Do I need accounts on all three venues to arbitrage?
PredictEngine handles the venue accounts for you — funded custodial wallets on each platform, single deposit at PredictEngine funds them all proportionally.
How fast does the arb bot execute?
Sub-second leg placement. PredictEngine maintains live WebSocket connections to all venues, so when a spread appears the bot fires both legs before slow takers can pick it off.
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