Polymarket vs Other Platforms

Polymarket has the highest liquidity of any prediction market, with $100M+ in monthly volume — far ahead of Kalshi, PredictIt, or Manifold. Higher liquidity means tighter spreads, better fills, and easier entry/exit on trades. Kalshi is the closest second for US users, especially in sports markets, but is still 5-10x smaller than Polymarket overall.

It depends on your goals and where you can legally trade. Polymarket tends to win on global liquidity, market variety, on-chain transparency, and is the only ecosystem with copy trading via Polycopy. Kalshi wins on US-regulated cash event contracts in USD, and has scaled aggressively into sports markets since 2024. If you're a US user who wants regulated sports markets in dollars, Kalshi is the natural choice; if you want depth, breadth, or to follow other traders, Polymarket plus Polycopy.

There's no single 'best' app — it depends on your geography, asset rails, market selection, and whether you want copy trading. For global users with crypto wallets, Polymarket has the deepest liquidity and broadest market selection, and Polycopy is the only companion app that adds a copy-trading layer. For US users wanting regulated USD markets, Kalshi is the most credible option. For learning prediction markets without real-money risk, Manifold's play-money markets are the easiest entry point.

Manifold is primarily a play-money prediction market — users trade with 'Mana' that has no direct cash value, though Manifold has expanded cash-prize 'sweepstakes' markets. Polymarket is a full real-money platform with $100M+ monthly volume and on-chain settlement. Manifold is best treated as a learning environment or hobbyist platform; Polymarket is for serious trading. Manifold has more total markets (10,000+) but most are very low-volume.

No — Polycopy currently only supports Polymarket. Kalshi, PredictIt, and Manifold don't expose public trader performance data or the API infrastructure needed for copy trading. Polymarket's blockchain-based transparency (every trade is on Polygon and publicly attributable to a wallet) makes it the only prediction market where ranking traders by verified P&L is currently possible.

Polymarket is geo-restricted and not available to US users for direct trading, though US-based interest in the platform remains high. US users can legally access prediction markets through Kalshi (CFTC-regulated) or PredictIt (status varies — check current rulings). Polymarket's regulatory status outside the US varies by jurisdiction; always verify local rules. See our trust hub on whether Polymarket is legit for context.

Polymarket charges no platform fees — you only pay Polygon network gas (pennies per trade). Kalshi charges 7% on winnings, which is significant for active traders. PredictIt charges 10% on profits plus a 5% withdrawal fee, the highest of the major platforms. Manifold has no fees on play-money markets. On a long-term ROI basis, fees compound — Polymarket's 0% structure is a meaningful edge.

Polymarket is available globally with a few notable exclusions, including the United States, France, and a handful of other jurisdictions where prediction markets are restricted. The platform geo-blocks based on your IP. Specific country availability changes; always verify on Polymarket's official site before depositing. Using a VPN to access Polymarket from a restricted jurisdiction violates Polymarket's terms of service.