Mimecast
Cloud email security platform with threat protection, archiving, and continuity
ToolEmail SecurityCloud
Pricing: Custom pricing / per-user licensing
Reviewed by the Cyber Vendor Guide editorial team against the public sources cited below · Last reviewed February 2026 · How we review listings
What is 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.
Best for: Mid-to-large enterprises wanting a unified email security, archiving, and continuity platform with strong API integrations
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
Things to check
- 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
Reported in public reviews and vendor documentation. See sources below.
Key Features
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Sources & references
Where the information on this listing comes from. Always verify pricing and capabilities against the vendor before a purchasing decision.
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Key facts
- Pricing
- Custom pricing / per-user licensing
- Model
- Per-user subscription
- Founded
- 2003
- Cloud
- Yes
- Self-hosted
- No
Mimecast Alternatives
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- Cisco Secure EmailEnterprise email security gateway with Cisco Talos threat in...
Where Mimecast appears
Guides
Shortlists
Certifications
ISO 27001, SOC 2 Type II, ISO 27701