Play-money and free-to-use prediction market platforms for practicing and learning.
You do not need to risk real money to participate in prediction markets. Play-money platforms let you practice forecasting, test strategies, and contribute to collective intelligence without any financial downside. They are also some of the most innovative platforms in the space, often experimenting with new market types and resolution mechanisms that real-money exchanges cannot easily offer.
Play-money prediction markets serve several important purposes beyond practice. Academic researchers use them to study information aggregation and crowd forecasting. Organizations use internal prediction markets to surface employee knowledge about project timelines, product launches, and strategic decisions. And for individual forecasters, they provide a track record that demonstrates skill.
Perhaps most surprisingly, play-money markets can be remarkably accurate. Studies have shown that well-designed play-money platforms produce forecasts that rival real-money markets in accuracy, particularly when they attract a large and engaged user base. The motivation to be right — to climb leaderboards, build reputation, and demonstrate expertise — can be nearly as powerful as financial incentives.
Manifold Markets is the most active play-money prediction market, with thousands of user-created markets covering everything from geopolitics to pop culture. Anyone can create a market on any topic, which means you will find questions here that no real-money exchange would ever list. Manifold also serves as an excellent testing ground before moving to platforms where real money is at stake.
Metaculus takes a different approach. Rather than a trading market, Metaculus uses a calibration-based scoring system where forecasters submit probability estimates and earn points based on accuracy over time. This makes it more of a forecasting tool than a market, but the result is a deeply engaged community of skilled forecasters whose track records are publicly verifiable.
Metaculus has become a trusted source for long-range forecasts on AI development, biosecurity, climate change, and other topics where traditional prediction markets lack liquidity. Its community predictions are regularly cited in academic papers and policy discussions.
If you are new to prediction markets, starting with a play-money platform is the smartest move. You will learn how probability pricing works, develop intuitions about calibration, and discover which topics you forecast well — all without risking a dollar. Begin with Manifold Markets to get hands-on trading experience, then explore Metaculus to sharpen your calibration skills. Once you feel confident, transitioning to real-money platforms like Kalshi or Polymarket will feel natural.
