Cajal (YC W26) is massively scaling formal verification to accelerate scientific discovery. We deploy superhuman AI mathematicians to high-impact applied domains, starting with quantum computing and finance. We do this with Lean - a framework that allows us to formally verify any mathematical statement, grounding AI in truth and validating the tools discovered by our systems.
From the launch
Cajal is a Y Combinator backed startup using AI to scale scientific discovery beyond human limits. Cajal applies formal verification to domains like quantum computing and finance, deploying advanced AI systems to solve problems humans cannot solve alone. Cajal: YC Winter 2026: Cajal: Scaling Formal Verification for Scientific Discovery
