Outpost Bio is decoding the hidden interactions that drive human biology. The company combines high-throughput assays of human-derived microbial communities with machine learning to build frontier models that reveal causal pathways - not just correlations. Headquartered in Boston and London, the company enables any partner developing molecules that go into or onto humans to predict microbe-mediated metabolism, toxicity, and response - making human microbiology computable for the first time.