Sublime Security
Sublime Security: A customizable email security platform with unusually broad protection in its free Core plan. Ranked #1 of 34 in Email Security Gateways by our editors (9.4/10); pricing: Free plan; best for teams wanting strong value and customization.
At a glance
- Editor score9.4 / 10
- PricingFree plan
- Best forTeams wanting strong value and customization
- Free planYes
- Outbound filteringYes
- Founded2019
- Facts checked20 Sep 2026
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
Our verdict on Sublime Security
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, while also supporting user-reported email triage, threat hunting, custom detection rules, remediation, and outbound data-loss prevention. Its combination of managed SaaS, self-managed, and API-based deployment options suits security teams that want control over how email protection fits into their environment.
Pricing is structured around Core and Enterprise. Core is free for individual security practitioners and lightweight deployments, with the first 100 mailboxes free. Its published capabilities include AI-powered detection, impersonation protection, dynamic link analysis, attachment and file analysis, custom rules, historical search, automated triage, mailbox remediation, quarantine, warning banners, campaign-level automation, and outbound email DLP. Enterprise adds the full platform, premium support, and advanced controls, with access beginning through a demo request. Teams needing those Enterprise-specific capabilities should not treat Core as the complete offering.
The platform stands out for the depth of its detection and response controls. Dynamic link analysis uses headless browsers, while attachment, URL, OCR, and computer-vision analysis extend coverage beyond basic message scanning. Custom MQL detection rules include backtesting, and CrowdStrike Falcon Sandbox can provide submission and detonation results. Integrations span Microsoft 365, Google Workspace, IMAP, REST API, webhooks, Amazon S3, SIEM, SOAR, and CrowdStrike Falcon Sandbox. Sublime Security is a strong fit for teams that value customization, threat hunting, and flexible deployment; smaller teams seeking only a basic email filter may find its broader security scope unnecessary.
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Sublime Security pricing
All 2 Sublime Security plans and prices →
Sublime Security fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| Outbound filtering | Yes |
| Impersonation protection | Yes |
| Malware sandboxing | Yes |
| Deployment model | Hybrid |
| Microsoft 365 support | Yes |
| Google Workspace support | Yes |
| Deployment | Cloud, Self-hosted |
| Platforms | Web |
| Integrations | 9 integrations: Microsoft 365, Google Workspace, IMAP, REST API, webhooks, Amazon S3 … |
| Pricing | Free plan (source) |
| Website | sublime.security |
| Facts checked | 20 Sep 2026 |
Sublime Security integrations
Sublime Security lists 9 integrations on its own site.
- Microsoft 365
- Google Workspace
- IMAP
- REST API
- webhooks
- Amazon S3
- SIEM
- SOAR
- CrowdStrike Falcon Sandbox
Alternatives to Sublime Security
- Sophos EmailA broad cloud gateway for Microsoft 365 and Google Workspace email protection.9.2
- Cloudflare Email SecurityA flexible email gateway for organizations needing layered inbound and outbound protection.9.0
- Darktrace / EMAILBehavioral AI protection across email, collaboration tools, and connected security systems.8.9
See all Sublime Security alternatives →
Sublime Security vs the competition
- Sublime Security vs Sophos Email
- Sublime Security vs Cloudflare Email Security
- Sublime Security vs Darktrace / EMAIL
- Sublime Security vs Check Point Email Security
- Sublime Security vs Mimecast Secure Email Gateway
- Sublime Security vs Libraesva Email Security
Compare Sublime Security with any tool side by side →
Also Ranked In
Sublime Security is ranked in 3 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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