Mimecast / mimecast.com
AI-powered email security and cyber resilience providing advanced threat protection, impersonation defence, security awareness training, and DMARC management for 40,000+ organisations.
Pricing
Free
Free plan
No
Category
Developer Tools
Platforms
3
Free plan
No
API access
No
Open source
No
Platforms
3
Mimecast protects against email-borne threats — phishing, malware, impersonation, and BEC — alongside security awareness training and continuity services. AI Threat Intelligence ML detects sophisticated phishing and malware through URL, attachment, sender behaviour, and content analysis, aggregating signals from 40,000+ customer organisations. Impersonation Detection AI identifies executive and brand impersonation for BEC prevention. Security Awareness Training delivers phishing simulation campaigns with AI-personalised training — employees who click simulations receive targeted training based on their demonstrated vulnerability. DMARC Analyser manages email authentication to prevent domain impersonation. Email continuity maintains access during outages.
Mimecast AI runs as ml platform software built around text and data workflows. Users typically start with a prompt, upload, or connected data source, and the underlying model handles the heavy lifting before returning a result you can refine or export. It's available on web, microsoft 365 integration, and google workspace integration.
The capabilities that matter most for teams evaluating Mimecast AI.
ML detecting sophisticated phishing and malware aggregating signals from 40,000+ organisations — improving detection accuracy for novel threats beyond signatures.
AI identifying executive and brand impersonation patterns — detecting display name spoofing, lookalike domains, and header manipulation before employees are deceived.
Phishing simulation with AI-personalised training targeting each employee's demonstrated vulnerability — improving effectiveness beyond generic security education.
Annual subscription. Per-seat pricing. Private company (Permira). Demo available.
Model
Subscription
Starting price
Free
Free trial
Yes
Proofpoint (covered) is the primary direct competitor. Abnormal Security provides AI-native email security. Microsoft Defender for Office 365 is included in Microsoft 365. Tessian provides AI-powered email DLP.
A side-by-side look at the closest alternative in this category.
Key facts about model providers, platforms, and team support.
Model Provider
Mimecast
Platforms
Web, Microsoft 365 integration, Google Workspace integration
Deployment
SaaS
Integrations
Microsoft 365, Google Workspace, SIEM systems, API
Team Collaboration
No
Launch Year
2022
Compliance signals and data-handling notes as reported by the vendor.
SOC 2 Type II. ISO 27001. GDPR compliant. Enterprise data handling agreements.
Email content and metadata processed on Mimecast cloud for threat analysis. Attachment sandboxing uses isolated analysis environments.
Editorial Verdict
Mimecast is a strong AI email security platform for organisations wanting advanced phishing protection, executive impersonation defence, integrated awareness training, and DMARC management.
Last verified July 24, 2026.
Annual subscription. Per-seat pricing. Private company (Permira). Demo available.
Enterprise licensing. No public pricing. Annual contracts. Owned by Thoma Bravo. Demo available.
SOC 2 Type II. ISO 27001. GDPR compliant. Enterprise data handling agreements.
SOC 2 Type II. ISO 27001. GDPR compliant. FedRAMP authorised. HIPAA eligible. Enterprise data handling agreements.
Email content and metadata processed on Mimecast cloud for threat analysis. Attachment sandboxing uses isolated analysis environments.
Email content and threat intelligence data processed on Proofpoint cloud. FedRAMP for US government email security deployments.
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