Will Ahmed pitched WHOOP to well over a hundred investors before one said yes. He was 22, captain of Harvard's squash team, and convinced that his own chronic fatigue was a data problem nobody had bothered to solve. The company came within weeks of running out of cash more than once. Fourteen years later, WHOOP closed a round that values it at $10.1 billion, with Cristiano Ronaldo, LeBron James and the Qatar Investment Authority writing checks alongside the Mayo Clinic and Ab

OpenEvidence started in 2021 essentially as a search engine built for doctors. It is trained on licensed medical literature and made available free to any licensed clinician in the US, with access verified by NPI number or a hospital email. Founder Daniel Nadler had already sold one AI company, Kensho, to S&P Global and he built this one on the same bet: a narrow model grounded in the right data beats a general one in a field where being wrong has heavy costs.