StartupHub.ai's proprietary cross-venue engine has surfaced 10 live prediction market arbitrage opportunities as of July 19, 2026. These opportunities involve the same real-world event being priced on two different venues, such as Polymarket, Kalshi/Robinhood, or PredictIt, where buying a 'YES' contract on one venue and a 'NO' contract on another totals less than $1. This strategy effectively locks in a guaranteed payout, regardless of the event's outcome.
For newcomers, an arbitrage lock means you can buy both sides of a bet for a combined cost less than the potential payout, guaranteeing a profit. It's important to note that spreads can close very quickly, and factors like fees, KYC requirements, and withdrawal limits on individual platforms can impact actual returns. This information is for informational purposes only and is not financial advice.
Track these live, or poll the free API
The board above refreshes on its own, so this page stays current long after today. The full cross-venue feed lives on the arbitrage board, and every match is also a free JSON API and an MCP tool, so a trading agent can poll live Polymarket, Kalshi and PredictIt arbitrage opportunities and act on them.
curl https://www.startuphub.ai/api/v1/arbitrage?arbs_only=1Read the arbitrage API reference or open the live JSON endpoint.
Informational feed, not financial advice. Live arbitrages are often fleeting, and fees, gas, KYC and withdrawal limits eat into the spread. Verify each market’s resolution rules and costs before trading.
