Mimecast, a privately owned company headquartered in the UK, was founded in 2003. With approximately 2,140 employees, the company operates in the computer and network security sector, specializing as a fraud prevention provider.
On April 21, 2026, Mimecast aligned its services with the UK National Cyber Security Centre's (NCSC) Cyber Assessment Framework (CAF), a government standard designed for organizations operating essential services. This framework emphasizes true cyber resilience, focusing on maintaining service operations before, during, and after an attack, rather than solely on perimeter threat blocking, and is structured around four objectives and 14 principles of security capability.
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