Microsoft Defender for Office 365 vs SpamTitan Gateway: side-by-side comparison (2026)

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

SpamTitan Gateway: Email security gateway appliance for spam/malware filtering and mail flow control. Built by SpamTitan (TitanHQ).

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

Microsoft Defender for Office 365 is made by Microsoft. SpamTitan Gateway is made by SpamTitan (TitanHQ). The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Often, yes. Microsoft Defender for Office 365 and SpamTitan Gateway are both Email Security Platforms products. Use the table above to see where features, deployment and company size fit differ.