Hey Product Hunt 👋 I'm the founder of Opipoly — here's the honest story of why this exists. I trade on prediction markets. Polymarket and Opinion both list the same events but don't always agree on the price. That gap is the edge. My old workflow to find it: → Open Polymarket → Find a market → Open Opinion in a new tab → Search for the same event → Compare manually → Spread already closed Every single time. So I built Opipoly. Live feed, both venues side by side, ranked by spread size. One click takes you directly to the market on either exchange. v1 is rough — 8 markets, basic UI, no filters yet. But the feed is live, the spreads are real, and I'm already using it myself every day. More markets, more venues, and better filtering are all coming fast. Happy to answer anything — how it's built, how cross-venue arbitrage works, or what's on the roadmap. Ask me anything 👇

Opipoly

Live spread scanner for Polymarket and Opinion

Live spread scanner for Polymarket and Opinion