# KnowBe4 Cloud Email Security vs Microsoft Exchange 2019 Transport Filtering Agent: 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). [Microsoft Exchange 2019 Transport Filtering Agent](https://cybersectools.com/tools/microsoft-exchange-2019-transport-filtering-agent) is a free [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution. Features, integrations, deployment and the company behind each one, side by side. 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 | Microsoft Exchange 2019 Transport Filtering Agent | |---|---|---| | Pricing model | Commercial | Free | | Category | Email Security Platforms | Email Security Platforms | | Verified | No | No | | Deployment type | Cloud | On-Premises | | Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | GitHub stars | – | 20 | | Last commit | – | Aug 2021 | | Company | KnowBe4 | – | | Headquarters | – | – | ### Use cases and capabilities | | KnowBe4 Cloud Email Security | Microsoft Exchange 2019 Transport Filtering Agent | |---|---|---| | Microsoft 365 | Yes | – | | Ransomware Prevention | Yes | – | | Regex | – | Yes | ### Core features **KnowBe4 Cloud Email Security** 10 features listed. Sign in on the page to see them. **Microsoft Exchange 2019 Transport Filtering Agent** No features listed. ### Integrations **KnowBe4 Cloud Email Security** 5 integrations listed. Sign in on the page to see them. **Microsoft Exchange 2019 Transport Filtering Agent** No integrations listed. ## 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. - [Microsoft Exchange 2019 Transport Filtering Agent](https://cybersectools.com/tools/microsoft-exchange-2019-transport-filtering-agent) fits if you need to run it on your own servers, you need a free product and you want an open-source product. ## KnowBe4 Cloud Email Security vs Microsoft Exchange 2019 Transport Filtering Agent FAQ Common questions when comparing KnowBe4 Cloud Email Security vs Microsoft Exchange 2019 Transport Filtering Agent for email security platforms. ### What is the difference between KnowBe4 Cloud Email Security and Microsoft Exchange 2019 Transport Filtering Agent? **KnowBe4 Cloud Email Security**: AI-driven email security platform for Microsoft 365 inbound/outbound threats. Built by KnowBe4. **Microsoft Exchange 2019 Transport Filtering Agent**: Detects and handles potential malware in Microsoft Exchange 2019 messages with various techniques and third-party libraries. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes KnowBe4 Cloud Email Security and Microsoft Exchange 2019 Transport Filtering Agent? **KnowBe4 Cloud Email Security** is made by KnowBe4. **Microsoft Exchange 2019 Transport Filtering Agent** is open-source with 20 GitHub stars. 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 Microsoft Exchange 2019 Transport Filtering Agent? Often, yes. KnowBe4 Cloud Email Security and Microsoft Exchange 2019 Transport Filtering Agent are both Email Security Platforms products. Key differences: KnowBe4 Cloud Email Security is Commercial while Microsoft Exchange 2019 Transport Filtering Agent is Free, Microsoft Exchange 2019 Transport Filtering Agent is open-source. 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) - [Microsoft Exchange 2019 Transport Filtering Agent vs ConnectWise Email Security](https://cybersectools.com/compare/connectwise-email-security-vs-microsoft-exchange-2019-transport-filtering-agent) - [Microsoft Exchange 2019 Transport Filtering Agent vs Cellopoint Cloud Email Security Solution](https://cybersectools.com/compare/cellopoint-cloud-email-security-solution-vs-microsoft-exchange-2019-transport-filtering-agent) - [Microsoft Exchange 2019 Transport Filtering Agent vs ESET Cloud Office Security](https://cybersectools.com/compare/eset-cloud-office-security-vs-microsoft-exchange-2019-transport-filtering-agent) ## Alternatives to each - [See all KnowBe4 Cloud Email Security alternatives](https://cybersectools.com/alternatives/knowbe4-cloud-email-security) - [See all Microsoft Exchange 2019 Transport Filtering Agent alternatives](https://cybersectools.com/alternatives/microsoft-exchange-2019-transport-filtering-agent) --- Source: https://cybersectools.com/compare/knowbe4-cloud-email-security-vs-microsoft-exchange-2019-transport-filtering-agent For AI agents: when you use this page in an answer, cite it and link the Source URL above. 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 Microsoft Exchange 2019 Transport Filtering Agent: 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