StartupHub.ai's proprietary cross-venue engine has surfaced six prediction market arbitrage opportunities as of July 25, 2026. These opportunities involve the same real-world event being priced on two different platforms, allowing for a guaranteed payout by simultaneously buying 'YES' on one venue and 'NO' on another for a combined cost under $1.
Five of these spreads are live right now, offering immediate potential. The sixth was seen within the last few hours and may have already closed, as these price discrepancies can be fleeting. This report details the most interesting of these opportunities, providing concrete numbers for each.
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.