BT Blue (Blue) is a French technology company founded in 2005, operating highly connected, resilient, and sustainable data centers in Rennes and Nantes. The company provides cloud hosting, cybersecurity, and data center services to enterprises and public sector organisations, with over 10,000 servers in production. Blue holds ISO 27001 and HDS (Hébergeur de Données de Santé) certifications, and provides business continuity and disaster recovery through its two sites located less than 100 km apart.