# Fortinet FortiMail Email and Workspace Security vs KnowBe4 Cloud Email Security: 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). [KnowBe4 Cloud Email Security](https://cybersectools.com/tools/knowbe4-cloud-email-security) is a commercial [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution by [KnowBe4](https://cybersectools.com/companies/knowbe4). 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 | KnowBe4 Cloud Email Security | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Email Security Platforms | Email Security Platforms | | Verified | No | No | | Deployment type | Hybrid | Cloud | | Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | Fortinet | KnowBe4 | | Headquarters | – | – | ### Use cases and capabilities | | Fortinet FortiMail Email and Workspace Security | KnowBe4 Cloud Email Security | |---|---|---| | Microsoft 365 | Yes | Yes | | Ransomware Prevention | – | Yes | ### Core features **Fortinet FortiMail Email and Workspace Security** 10 features listed. Sign in on the page to see them. **KnowBe4 Cloud Email Security** 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. **KnowBe4 Cloud Email Security** 5 integrations listed. Sign in on the page to see them. ## 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. - [KnowBe4 Cloud Email Security](https://cybersectools.com/tools/knowbe4-cloud-email-security) fits if you want a cloud product. ## Fortinet FortiMail Email and Workspace Security vs KnowBe4 Cloud Email Security FAQ Common questions when comparing Fortinet FortiMail Email and Workspace Security vs KnowBe4 Cloud Email Security for email security platforms. ### What is the difference between Fortinet FortiMail Email and Workspace Security and KnowBe4 Cloud Email Security? **Fortinet FortiMail Email and Workspace Security**: AI-powered email security platform protecting against phishing, BEC, and ATO. Built by Fortinet. **KnowBe4 Cloud Email Security**: AI-driven email security platform for Microsoft 365 inbound/outbound threats. Built by KnowBe4. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Fortinet FortiMail Email and Workspace Security and KnowBe4 Cloud Email Security? **Fortinet FortiMail Email and Workspace Security** is made by Fortinet. **KnowBe4 Cloud Email Security** is made by KnowBe4. 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 KnowBe4 Cloud Email Security? Often, yes. Fortinet FortiMail Email and Workspace Security and KnowBe4 Cloud Email Security are both Email Security Platforms products, and both cover Microsoft 365. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [Fortinet FortiMail Email and Workspace Security vs ConnectWise Email Security](https://cybersectools.com/compare/connectwise-email-security-vs-fortinet-fortimail-email-security) - [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 ESET Cloud Office Security](https://cybersectools.com/compare/eset-cloud-office-security-vs-fortinet-fortimail-email-security) - [KnowBe4 Cloud Email Security vs ConnectWise Email Security](https://cybersectools.com/compare/connectwise-email-security-vs-knowbe4-cloud-email-security) - [KnowBe4 Cloud Email Security vs Cellopoint Cloud Email Security Solution](https://cybersectools.com/compare/cellopoint-cloud-email-security-solution-vs-knowbe4-cloud-email-security) - [KnowBe4 Cloud Email Security vs ESET Cloud Office Security](https://cybersectools.com/compare/eset-cloud-office-security-vs-knowbe4-cloud-email-security) ## Alternatives to each - [See all Fortinet FortiMail Email and Workspace Security alternatives](https://cybersectools.com/alternatives/fortinet-fortimail-email-security) - [See all KnowBe4 Cloud Email Security alternatives](https://cybersectools.com/alternatives/knowbe4-cloud-email-security) --- Source: https://cybersectools.com/compare/fortinet-fortimail-email-security-vs-knowbe4-cloud-email-security 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 KnowBe4 Cloud Email Security: 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