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Mimecast vs Tessian
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Email Security Platforms
Overview
Focus
Email Security Platforms
Email Security
Product
Mimecast provides email security, archiving, and continuity solutions protecting organizations from phishing, ransomware, and business email compromise.
Tessian provides AI-powered email security that prevents accidental data loss, phishing attacks, and misdirected emails by understanding human communication patterns.
Headquarters
London, United Kingdom
London, United Kingdom
Company size
1,001-5,000 employees
201-500 employees
Founded
2003
2013
Pricing details
Source updated
Nov 2, 2026
Oct 29, 2026