H1 is an AI-powered platform that helps identify and engage the right doctors for critical workflows across Pharma, health plan, health system, and technology companies. At the core of the platform is H1’s Doctor Graph—a structured representation of physician identity, expertise, relationships, and behavioral signals, creating a powerful network effect as it is continuously enriched by participants across the healthcare ecosystem. Built on one of the world’s largest and most comprehensive global datasets of healthcare professionals, H1 combines deep healthcare data with agentic AI workflows to power critical workflows across drug development, medical and commercial engagement, care navigation, and provider data and network intelligence. Founded in 2017, the company is based in New York, United States.