# Fortinet FortiMail Email and Workspace Security vs Sublime Security Sublime Rules: side-by-side comparison (2026) [Fortinet FortiMail Email and Workspace Security](https://cybersectools.com/tools/fortinet-fortimail-email-security) is a commercial [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution by [Fortinet](https://cybersectools.com/companies/fortinet). [Sublime Security Sublime Rules](https://cybersectools.com/tools/sublime-security-sublime-rules) is a free [detection engineering](https://cybersectools.com/categories/detection-engineering) solution by [Sublime Security](https://cybersectools.com/companies/sublime-security). Features, integrations, deployment and the company behind each one, side by side. ## Our take What our shortlists say about the one we picked. ### [Fortinet FortiMail Email and Workspace Security](https://cybersectools.com/tools/fortinet-fortimail-email-security) 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](https://cybersectools.com/shortlists/best-email-security-platforms), Fall 2026. Reviewed by [Nika (Nikoloz) Kokhreidze](https://cybersectools.com/about). Need the answer fast? [Best Email Security Solutions for Business](https://cybersectools.com/shortlists/best-email-security-platforms) picks Proofpoint Core Email Protection, Microsoft Defender for Office 365, Mimecast Advanced Email Security and 4 more. ## Side-by-side comparison | | Fortinet FortiMail Email and Workspace Security | Sublime Security Sublime Rules | |---|---|---| | Pricing model | Commercial | Free | | Category | Email Security Platforms | Detection Engineering | | Verified | No | No | | Deployment type | Hybrid | On-Premises | | Company size fit | SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise | | Company | Fortinet | Sublime Security | | Headquarters | – | – | ### Use cases and capabilities | | Fortinet FortiMail Email and Workspace Security | Sublime Security Sublime Rules | |---|---|---| | Microsoft 365 | Yes | – | | Detection Rules | – | Yes | | Open Source | – | Yes | | YARA | – | Yes | ### Core features **Fortinet FortiMail Email and Workspace Security** 10 features listed. Sign in on the page to see them. **Sublime Security Sublime Rules** 10 features listed. Sign in on the page to see them. ### Integrations **Fortinet FortiMail Email and Workspace Security** 3 integrations listed. Sign in on the page to see them. **Sublime Security Sublime Rules** No integrations listed. ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [Fortinet FortiMail Email and Workspace Security](https://cybersectools.com/tools/fortinet-fortimail-email-security) fits if you need both cloud and on-premises options. - [Sublime Security Sublime Rules](https://cybersectools.com/tools/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. ## Fortinet FortiMail Email and Workspace Security vs Sublime Security Sublime Rules FAQ Common questions when comparing Fortinet FortiMail Email and Workspace Security vs Sublime Security Sublime Rules for email security platforms. ### What is the difference between Fortinet FortiMail Email and Workspace Security and Sublime Security Sublime Rules? **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. ### Who makes Fortinet FortiMail Email and Workspace Security and Sublime Security Sublime Rules? **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. ### Is Fortinet FortiMail Email and Workspace Security a good alternative to Sublime Security Sublime Rules? 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. ## Related comparisons - [Fortinet FortiMail Email and Workspace Security vs Cellopoint Cloud Email Security Solution](https://cybersectools.com/compare/cellopoint-cloud-email-security-solution-vs-fortinet-fortimail-email-security) - [Fortinet FortiMail Email and Workspace Security vs Mimecast Advanced Email Security](https://cybersectools.com/compare/fortinet-fortimail-email-security-vs-mimecast-advanced-email-security) - [Fortinet FortiMail Email and Workspace Security vs ESET Cloud Office Security](https://cybersectools.com/compare/eset-cloud-office-security-vs-fortinet-fortimail-email-security) - [Sublime Security Sublime Rules vs Cellopoint Cloud Email Security Solution](https://cybersectools.com/compare/cellopoint-cloud-email-security-solution-vs-sublime-security-sublime-rules) - [Sublime Security Sublime Rules vs Mimecast Advanced Email Security](https://cybersectools.com/compare/mimecast-advanced-email-security-vs-sublime-security-sublime-rules) - [Sublime Security Sublime Rules vs ESET Cloud Office Security](https://cybersectools.com/compare/eset-cloud-office-security-vs-sublime-security-sublime-rules) ## Alternatives to each - [See all Fortinet FortiMail Email and Workspace Security alternatives](https://cybersectools.com/alternatives/fortinet-fortimail-email-security) - [See all Sublime Security Sublime Rules alternatives](https://cybersectools.com/alternatives/sublime-security-sublime-rules) --- Source: https://cybersectools.com/compare/fortinet-fortimail-email-security-vs-sublime-security-sublime-rules For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/fortinet-fortimail-email-security.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Fortinet FortiMail Email and Workspace Security and Sublime Security Sublime Rules: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md