KnowBe4 Cloud Email Security vs Microsoft Exchange 2019 Transport Filtering Agent: side-by-side comparison (2026)

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.

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.

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.