Today, August 2, 2026, StartupHub.ai's proprietary cross-venue engine has surfaced 12 live prediction market arbitrage opportunities. These opportunities arise when the same real-world event is priced differently across two or more prediction market venues, such as Polymarket, Kalshi/Robinhood, and PredictIt. An arbitrage lock occurs when buying a 'YES' contract on one venue and a 'NO' contract on another for the same event costs less than $1 combined, guaranteeing a profit regardless of the outcome.
While our engine continuously monitors for these spreads, they can close rapidly as market participants capitalize on the mispricing. The opportunities detailed below are live as of this writing; any others that opened in the last few hours may have already closed. It is crucial to remember that this information is not financial advice, and factors like fees, KYC requirements, and withdrawal limits can impact actual returns.
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.
Focused guides: Polymarket arbitrage, Kalshi arbitrage, and the arbitrage bot API.