Tessian vs Microsoft Defender for Office 365

Microsoft Defender for Office 365 and Tessian are both cloud email security solutions. Microsoft Defender for Office 365 microsoft's native email security for Microsoft 365 with XDR integration, while Tessian human layer security platform preventing inbound threats and outbound misdirected emails. The best choice depends on your organization's size, technical requirements, and budget.

Choose Microsoft Defender for Office 365 if deep native integration with Microsoft 365 and Defender XDR ecosystem is your priority and microsoft 365-centric organizations wanting native email security with XDR integration and cost efficiency through E5 licensing. Choose Tessian if unique misdirected email prevention addresses a gap no other tool covers well matters most and organizations concerned about both inbound email threats and accidental data loss from misdirected emails and human error.

Microsoft Defender for Office 365 starts at Plan 1 from $2/user/month / Plan 2 from $5/user/month / included in E5 (per-user subscription (bundled with microsoft 365 e5)). Tessian starts at Custom pricing / per-user licensing (per-user subscription). As always, the sticker price only tells part of the story. Factor in add-ons, implementation costs, and what's actually included at each tier.

It depends on how deeply Tessian is embedded in your stack. Most teams run both in parallel for a few weeks before cutting over. Check whether Microsoft Defender for Office 365 supports importing your existing configs or policies. That's usually the biggest time sink.