Fortinet FortiMail Email and Workspace Security is a commercial email security platforms solution by Fortinet. Sublime Security Sublime Rules is a free detection engineering solution by Sublime Security. Features, integrations, deployment and the company behind each one, side by side.
What our shortlists say about the one we picked.
Best for: Fortinet customers and on-premises mail servers
It belongs here because inbound and outbound protection, DLP and encryption come in one product that runs as a gateway or through an API, which suits companies that still host their own mail servers. Multi-tenancy and a managed incident response service help if a provider runs your email security. If you use no other Fortinet products, weigh how much of its value depends on that ecosystem.
From Best Email Security Solutions for Business, Fall 2026
Reviewed by Nika (Nikoloz) Kokhreidze.
AI-powered email security platform protecting against phishing, BEC, and ATO
Open-source detection rules for email attacks like BEC, phishing, and malware
See more solutions in this category, or build a security stack from your picks.
Based on what each listing shows: deployment, company size, price and open source.
Fortinet FortiMail Email and Workspace Security fits if you need both cloud and on-premises options.
Sublime Security Sublime Rules fits if you need to run it on your own servers, you are a startup, you need a free product and you want an open-source product.
Common questions when comparing Fortinet FortiMail Email and Workspace Security vs Sublime Security Sublime Rules for email security platforms.
Fortinet FortiMail Email and Workspace Security: AI-powered email security platform protecting against phishing, BEC, and ATO, built by Fortinet.
Sublime Security Sublime Rules: Open-source detection rules for email attacks like BEC, phishing, and malware, built by Sublime Security.
The table above shows where their features, integrations, deployment and company size fit differ.
Fortinet FortiMail Email and Workspace Security is made by Fortinet. Sublime Security Sublime Rules is open-source. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.
In part. Fortinet FortiMail Email and Workspace Security and Sublime Security Sublime Rules are not in the same category on CybersecTools. Key differences: Fortinet FortiMail Email and Workspace Security is Commercial while Sublime Security Sublime Rules is Free. Use the table above to see where features, deployment and company size fit differ.
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