Prediction markets turn many individual judgments into forecasts that can be tested against real outcomes. That makes them worth studying. But the public data underneath them is scattered, inconsistent, and difficult to reproduce.
We started Mostly Right because we kept rebuilding the same plumbing: reconciling public feeds, interpreting contract rules, and discovering that a backtest no longer matched live because a source had quietly changed.
Mostly Right is the layer we wanted: a local-first Python and TypeScript SDK that keeps sources and timestamps clear, and gives historical research and live decisions the same data contract. Not another exchange—the public-data infrastructure underneath.
We focus on outcomes you can verify: weather, markets, economic releases, financial events, and other questions grounded in public data. We want prediction markets to become trusted research infrastructure, not another engine for outrage.
Mostly Right is built by Vu Hoang Anh, Robert Tarabcak, and Vojtech Havlicek, working between Prague and New York.
The Mostly Right team
