Abnormal Inbound Email Security is a commercial email security platforms solution by Abnormal Security. KnowBe4 Cloud Email Security is a commercial email security platforms solution by KnowBe4. Features, integrations, deployment and the company behind each one, side by side.
What our shortlists say about the one we picked.
Best for: SOC teams wanting API-native BEC detection without gateway management
The limitation is scope. Abnormal is an inbound email security solution. It does not do DLP, archiving, DMARC enforcement, or awareness training. If you need a single platform to cover your entire email security program, you will need to pair it with other solutions. It also currently focuses on Microsoft email platforms, so Google Workspace coverage is more limited. For organizations that have already solved gateway filtering and are specifically struggling with BEC and VEC getting through, Abnormal is the most targeted solution in this list.
From Best Email Security Solutions for Business, Fall 2026
Reviewed by Nika (Nikoloz) Kokhreidze.
AI-powered email security platform detecting advanced threats via behavioral analysis
AI-driven email security platform for Microsoft 365 inbound/outbound threats
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Common questions when comparing Abnormal Inbound Email Security vs KnowBe4 Cloud Email Security for email security platforms.
Abnormal Inbound Email Security: AI-powered email security platform detecting advanced threats via behavioral analysis, built by Abnormal Security.
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.
Abnormal Inbound Email Security is made by Abnormal Security. 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.
Often, yes. Abnormal Inbound Email Security and KnowBe4 Cloud Email Security are both Email Security Platforms products. Use the table above to see where features, deployment and company size fit differ.
Need the answer fast? Best Email Security Solutions for Business picks Proofpoint Core Email Protection, Microsoft Defender for Office 365, Mimecast Advanced Email Security and 4 more.See the shortlist