Infonaligy Proofpoint Email Security vs Microsoft Defender for Office 365: side-by-side comparison (2026)

Infonaligy Proofpoint Email Security: Managed Proofpoint email security service for phishing & BEC protection. Built by Infonaligy.

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.

Infonaligy Proofpoint Email Security is made by Infonaligy. 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. Infonaligy Proofpoint Email Security and Microsoft Defender for Office 365 are both Email Security Platforms products. Use the table above to see where features, deployment and company size fit differ.