Polymarket
Best overall · Largest by volume · Global · Crypto-native
Strengths
- • $100M+ monthly trading volume — by far the largest
- • 1000+ active markets across politics, sports, crypto, geopolitics
- • On-chain settlement (Polygon, USDC) — every trade is publicly verifiable
- • No platform fees (only network gas, ~$0.01 per trade)
- • Mobile-optimized web app at polymarket.com
- • UMA oracle resolution with public dispute window
Weaknesses
- • Geo-blocked from US, France, and several other jurisdictions
- • Crypto-only deposits (USDC on Polygon) — no bank rails
- • No native iOS or Android app (web only)
- • Resolution disputes occasionally controversial (e.g., Ukraine peace deal)
Best for: Anyone outside the US who wants the deepest, most liquid prediction market with the broadest selection. If you're comfortable holding USDC on Polygon, this is the platform. Pair it with Polycopy for trader leaderboards and copy trading.