Sublime Security vs Mimecast Secure Email Gateway

Sublime Security9.4Visit Mimecast Secure Email Gateway8.7Visit

Higher score Sublime Security #1 in Email Security Gateways 9.4/10 Free plan Free plan✓ 5 of 5 features Try Sublime Security

vs

Mimecast Secure Email Gateway #6 in Email Security Gateways 8.7/10 Pricing on request ✓ 5 of 5 features Visit Mimecast

• Sublime Security fits best

  Teams wanting strong value and customization

• Mimecast Secure Email Gateway fits best

  Mature all-around email protection

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Side by side

Feature	Sublime Security 9.4/10 Visit ↗	Mimecast Secure Email Gateway 8.7/10 Visit ↗
At a glance
Editor score	9.4	8.7
Ranking	#1 in Email Security Gateways	#6 in Email Security Gateways
Best for	Teams wanting strong value and customization	Mature all-around email protection
Pricing model	Free plan + paid	Paid
Starting price	—	—
Free plan	✓ (best)	—
Free trial	—	—
Deployment	Cloud, Self-hosted	Cloud
Platforms	Web	Web
Integrations	9 integrations	5 integrations
Features Sublime Security 5/5 · Mimecast Secure Email Gateway 5/5
Outbound filtering	✓	✓
Impersonation protection	✓	✓
Malware sandboxing	✓	✓
Microsoft 365 support	✓	✓
Google Workspace support	✓	✓
Specs
Deployment model	Hybrid	Cloud
Our review
Pros	Free Core plan includes AI detection and response features Detects impersonation, malware, phishing, and policy violations Supports Microsoft 365, Google Workspace, APIs, SIEM/SOAR, and CrowdStrike	Scans inbound, outbound, and internal email Combines BEC protection, sandboxing, URL analysis, and DLP Integrates with Microsoft 365, Google Workspace, and security platforms
Cons	Core is intended for lightweight deployments Advanced controls are reserved for Enterprise Premium support is available with Enterprise	Pricing requires contact with sales No free plan is offered Its broad control set may exceed simpler email-security needs
Our verdict	Sublime Security is an AI-powered email security platform for organizations using Microsoft 365, Google Workspace, IMAP, or direct APIs. It covers phishing, business email compromise, malware, impersonation, spam, and policy violations,… Read the review →	Mimecast Secure Email Gateway is a cloud-based email security service for organizations using Microsoft 365, Google Workspace, on-premises, or hybrid email environments. It inspects inbound, outbound, and internal messages with layered… Read the review →

Strengths and trade-offs

• Sublime Security — where it wins

  • Free Core plan includes AI detection and response features
  • Detects impersonation, malware, phishing, and policy violations
  • Supports Microsoft 365, Google Workspace, APIs, SIEM/SOAR, and CrowdStrike

  Where it doesn't

  • Core is intended for lightweight deployments
  • Advanced controls are reserved for Enterprise
  • Premium support is available with Enterprise

• Mimecast Secure Email Gateway — where it wins

  • Scans inbound, outbound, and internal email
  • Combines BEC protection, sandboxing, URL analysis, and DLP
  • Integrates with Microsoft 365, Google Workspace, and security platforms

  Where it doesn't

  • Pricing requires contact with sales
  • No free plan is offered
  • Its broad control set may exceed simpler email-security needs

• Sublime Security9.4/10 · Free plan

  A customizable email security platform with unusually broad protection in its free Core plan.

  Try Sublime SecurityFull verdict →
• Mimecast Secure Email Gateway8.7/10 · Pricing on request

  A broad email security gateway for organizations needing layered protection and policy control.

  Visit MimecastFull verdict →