Verdict: Polymarket dominates in terms of trading volume and breadth of available markets. Kalshi offers the only CFTC-authorised pathway for US-based participants. Manifold provides a play-money environment suited to recreational forecasters and community-driven speculation. Across Europe and beyond, Polymarket accessed through PolyGram represents the optimal choice.
Prediction markets have surged dramatically throughout 2024 and into 2025. This guide examines how the sector's leading venues stack up.
Polymarket — The Liquidity Leader
| Liquidity | Over $1.5B in yearly turnover. Most competitive pricing in political and digital-asset categories |
| Markets | 1,000+ live opportunities spanning elections, blockchain, athletics, research, entertainment |
| Fees | No house take. Typical bid-ask gap ranges from 1–3 cents |
| Currency | USDC via Polygon network (blockchain wallet mandatory) |
| Access | Worldwide except United States. Identity verification required |
| Best for | Professional forecasters possessing analytical advantages |
Kalshi — US-Regulated Alternative
Kalshi stands as America's sole CFTC-authorised prediction venue. It welcomes US residents excluded from Polymarket and has expanded considerably. Trade-offs include narrower market selection relative to Polymarket, plus regulatory constraints that restrict certain contract categories.
Manifold Markets — Social Prediction
Manifold operates using virtual currency ("mana") instead of actual funds. It serves as an excellent platform for honing forecasting abilities and engaging in crowd-sourced prediction — though unsuitable for those seeking monetary returns. The ecosystem hosts more than 10,000 user-generated prediction contracts.
Metaculus — Forecasting Platform
Metaculus aggregates probability estimates from its specialist community. Monetary stakes are absent, yet it excels at establishing forecasting credentials and addressing international affairs questions. Academic institutions frequently reference its accuracy benchmarks.
Betfair — The Legacy Exchange
Betfair pioneered the betting exchange model, processing substantial annual volumes across athletics and electoral markets. Strengths include traditional currency support, FCA authorisation, and robust sports-market depth. Limitations encompass 2–5% commission structure on net gains, absence of blockchain-based offerings, and comparatively sparse election-related markets versus Polymarket.
Our Recommendation for 2025
For participants outside the US seeking maximum trading depth and comprehensive market selection: Polymarket via PolyGram. PolyGram streamlines the blockchain interface while granting full participation in Polymarket's comprehensive liquidity pool. Start trading on PolyGram →