# KnowBe4 Cloud Email Security vs Mimecast Advanced Email Security: side-by-side comparison (2026) [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). [Mimecast Advanced Email Security](https://cybersectools.com/tools/mimecast-advanced-email-security) is a commercial [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution by [Mimecast](https://cybersectools.com/companies/mimecast). Features, integrations, deployment and the company behind each one, side by side. ## Our take What our shortlists say about the one we picked. ### [Mimecast Advanced Email Security](https://cybersectools.com/tools/mimecast-advanced-email-security) Best for: Companies wanting a full gateway with clear tracking It earns its place because you can run it as a gateway or through an API, and archiving and continuity sit in the same platform, which suits a company with a mixed mail setup. Social graphing and computer vision aim at impersonation, not only malware. Weigh whether you need the archive and continuity parts, since they change how much of your mail flow depends on one vendor. 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 | | KnowBe4 Cloud Email Security | Mimecast Advanced Email Security | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Email Security Platforms | Email Security Platforms | | Verified | No | No | | Deployment type | Cloud | Hybrid | | Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | KnowBe4 | Mimecast | | Headquarters | – | – | ### Use cases and capabilities | | KnowBe4 Cloud Email Security | Mimecast Advanced Email Security | |---|---|---| | Microsoft 365 | Yes | Yes | | Ransomware Prevention | Yes | – | ### Core features **KnowBe4 Cloud Email Security** 10 features listed. Sign in on the page to see them. **Mimecast Advanced Email Security** 10 features listed. Sign in on the page to see them. ### Integrations **KnowBe4 Cloud Email Security** 5 integrations listed. Sign in on the page to see them. **Mimecast Advanced Email Security** 31 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. - [KnowBe4 Cloud Email Security](https://cybersectools.com/tools/knowbe4-cloud-email-security) fits if you want a cloud product. - [Mimecast Advanced Email Security](https://cybersectools.com/tools/mimecast-advanced-email-security) fits if you need both cloud and on-premises options. ## KnowBe4 Cloud Email Security vs Mimecast Advanced Email Security FAQ Common questions when comparing KnowBe4 Cloud Email Security vs Mimecast Advanced Email Security for email security platforms. ### What is the difference between KnowBe4 Cloud Email Security and Mimecast Advanced Email Security? **KnowBe4 Cloud Email Security**: AI-driven email security platform for Microsoft 365 inbound/outbound threats, built by KnowBe4. **Mimecast Advanced Email Security**: Email security platform protecting M365 & Google Workspace from threats, built by Mimecast. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes KnowBe4 Cloud Email Security and Mimecast Advanced Email Security? **KnowBe4 Cloud Email Security** is made by KnowBe4. **Mimecast Advanced Email Security** is made by Mimecast. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is KnowBe4 Cloud Email Security a good alternative to Mimecast Advanced Email Security? Often, yes. KnowBe4 Cloud Email Security and Mimecast Advanced 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 - [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) - [Mimecast Advanced Email Security vs ConnectWise Email Security](https://cybersectools.com/compare/connectwise-email-security-vs-mimecast-advanced-email-security) - [Mimecast Advanced Email Security vs Cellopoint Cloud Email Security Solution](https://cybersectools.com/compare/cellopoint-cloud-email-security-solution-vs-mimecast-advanced-email-security) - [Mimecast Advanced Email Security vs ESET Cloud Office Security](https://cybersectools.com/compare/eset-cloud-office-security-vs-mimecast-advanced-email-security) ## Alternatives to each - [See all KnowBe4 Cloud Email Security alternatives](https://cybersectools.com/alternatives/knowbe4-cloud-email-security) - [See all Mimecast Advanced Email Security alternatives](https://cybersectools.com/alternatives/mimecast-advanced-email-security) --- Source: https://cybersectools.com/compare/knowbe4-cloud-email-security-vs-mimecast-advanced-email-security For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/knowbe4-cloud-email-security.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on KnowBe4 Cloud Email Security and Mimecast Advanced 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