ESET Cloud Office Security vs Microsoft Defender for Office 365: side-by-side comparison (2026)

ESET Cloud Office Security: Cloud email security for Microsoft 365 and Google Workspace applications. Built by ESET.

Microsoft Defender for Office 365: Email and collaboration security for Microsoft 365 environments. Built by Microsoft.

The table above shows where their features, integrations, deployment and company size fit differ.

ESET Cloud Office Security is made by ESET. Microsoft Defender for Office 365 is made by Microsoft. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Often, yes. ESET Cloud Office Security and Microsoft Defender for Office 365 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.