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Chestnut Forty: The AI forecasting company for global macro events.
Chestnut Forty is a Y Combinator-backed company that the AI forecasting company for global macro events. The company participated in the Summer 2025 batch of Y Combinator.
We build forecasting agents for global macro events.
Chestnut Forty was part of Y Combinator's Summer 2025 cohort, has a team of approximately 1 employees, and is actively operating.