Vendor Profile

Mimecast

Mimecast is a cloud-based email security platform that provides comprehensive protection against advanced email threats including phishing, ransomware, impersonation attacks, and business email compromise. Its Targeted Threat Protection suite uses multiple detection layers including URL rewriting, attachment sandboxing, and impersonation detection to block threats before they reach the inbox. Mimecast also offers email continuity, archiving, and security awareness training, positioning it as a direct competitor to Proofpoint across the full email security lifecycle.

Last updated February 28, 2026

Founded

2003

Pricing

Custom pricing / per-user licensing

Verify with vendor

Deployment

Cloud

Enterprise Email Gateway

Key Features

+Targeted Threat Protection (URL, attachment, impersonation)

+Email continuity and failover

+Cloud-based email archiving

+Security awareness training

+DMARC management and brand protection

+Secure messaging and large file send

+API-based integrations with SIEM and SOAR

+Data loss prevention policies

Pros & Cons

Pros

+Email continuity keeps mail flowing during outages — unique differentiator
+Strong impersonation and brand protection capabilities
+Unified platform covering security, archiving, and continuity
+Good API ecosystem for SIEM and SOAR integrations
+Easier administration compared to Proofpoint for mid-market teams

Cons

–Detection efficacy slightly behind Proofpoint for advanced threats
–Email archiving search performance can be slow on large datasets
–Pricing is still premium and comparable to Proofpoint
–URL rewriting can break some legitimate links
–Security awareness training less mature than dedicated platforms

Best For

Mid-to-large enterprises wanting a unified email security, archiving, and continuity platform with strong API integrations

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