Castor

Castor is a health-technology company that builds a cloud-based eClinical platform for running clinical trials - from electronic data capture (EDC) and eConsent to eCOA/ePRO and real-world evidence. Founded in 2012 in Amsterdam by physician-researcher Dr. Derk Arts, Castor set out to replace clunky, expensive trial software with a self-service, researcher-friendly system. Today it supports more than 15,000 studies across 90+ countries and is used by leading CROs and biopharma companies, while pushing decentralized trials and practical AI (Castor Catalyst, built with Google Cloud) into mainstream research.