Microsoft Defender for Office 365 vs Tessian -- Cloud Email Security Compared
Microsoft Defender for Office 365 vs Tessian
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.
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The Verdict
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.
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Feature-by-Feature Comparison
| Feature | Tessian | Microsoft Defender for Office 365 |
|---|---|---|
| Pricing | Custom pricing / per-user licensing | Plan 1 from $2/user/month / Plan 2 from $5/user/month / included in E5 |
| Pricing Model | Per-user subscription | Per-user subscription (bundled with Microsoft 365 E5) |
| Open Source | No | No |
| Deployment | Cloud | Cloud |
| Best For | Organizations concerned about both inbound email threats and accidental data loss from misdirected emails and human error | Microsoft 365-centric organizations wanting native email security with XDR integration and cost efficiency through E5 licensing |
| Safe Links (URL detonation and rewrit... | Not available | Supported |
| Safe Attachments (sandbox analysis) | Not available | Supported |
| Anti-phishing with impersonation prot... | Not available | Supported |
When to Choose Each Tool
Choose Tessian when:
- +You value unique misdirected email prevention addresses a gap no other tool covers well
- +You value behavioral AI catches threats that gateway solutions miss
- +You value real-time coaching helps users make better security decisions
- +You want to avoid only protects Microsoft 365 — does not support Google Workspace or other platforms
- +You want to avoid detection efficacy for advanced threats historically behind Proofpoint and Mimecast
Choose Microsoft Defender for Office 365 when:
- +You value deep native integration with Microsoft 365 and Defender XDR ecosystem
- +You value included in Microsoft 365 E5 — significant cost savings for E5 customers
- +You value automated investigation and response reduces analyst workload
- +You want to avoid now part of Proofpoint — future as standalone product uncertain
- +You want to avoid not a full email gateway replacement
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Pros & Cons Comparison
Tessian
Pros
- +Unique misdirected email prevention addresses a gap no other tool covers well
- +Behavioral AI catches threats that gateway solutions miss
- +Real-time coaching helps users make better security decisions
- +Prevents both intentional exfiltration and accidental data loss
- +API-based deployment with no MX record changes required
Cons
- –Now part of Proofpoint — future as standalone product uncertain
- –Not a full email gateway replacement
- –Narrower threat coverage than comprehensive email security platforms
- –Behavioral models require learning period to reduce initial false positives
- –No email archiving or compliance capabilities
Microsoft Defender for Office 365
Pros
- +Deep native integration with Microsoft 365 and Defender XDR ecosystem
- +Included in Microsoft 365 E5 — significant cost savings for E5 customers
- +Automated investigation and response reduces analyst workload
- +Cross-domain detection correlates email threats with identity and endpoint signals
- +Continuous improvement from Microsoft's massive threat intelligence network
Cons
- –Only protects Microsoft 365 — does not support Google Workspace or other platforms
- –Detection efficacy for advanced threats historically behind Proofpoint and Mimecast
- –Configuration complexity across multiple Microsoft security portals
- –Plan 1 lacks important features like AIR and Threat Explorer
- –Less effective at catching novel social engineering attacks
Sources & References
- Microsoft Defender for Office 365 — Official Website & Documentation[Vendor]
- Tessian — Official Website & Documentation[Vendor]
- Microsoft Defender for Office 365 Reviews on G2[User Reviews]
- Tessian Reviews on G2[User Reviews]
- Microsoft Defender for Office 365 Reviews on TrustRadius[User Reviews]
- Tessian Reviews on TrustRadius[User Reviews]
- Microsoft Defender for Office 365 Reviews on PeerSpot[User Reviews]
- Tessian Reviews on PeerSpot[User Reviews]
- Gartner Market Guide for CNAPP 2024[Analyst Report]
- Forrester Wave: Cloud Workload Security 2024[Analyst Report]
- IDC MarketScape: CNAPP 2024[Analyst Report]
- Cloud Security Alliance: Cloud Controls Matrix[Industry Framework]
- Gartner Peer Insights: CNAPP[Peer Reviews]
Microsoft Defender for Office 365 vs Tessian FAQ
Common questions about choosing between Microsoft Defender for Office 365 and Tessian.
What is the main difference between Microsoft Defender for Office 365 and Tessian?
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.
Is Tessian better than Microsoft Defender for Office 365?
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.
How much does Tessian cost compared to Microsoft Defender for Office 365?
Tessian pricing: Custom pricing / per-user licensing. Microsoft Defender for Office 365 pricing: Plan 1 from $2/user/month / Plan 2 from $5/user/month / included in E5. Tessian's pricing model is per-user subscription, while Microsoft Defender for Office 365 uses per-user subscription (bundled with microsoft 365 e5) pricing.
Can I migrate from Microsoft Defender for Office 365 to Tessian?
Yes, you can migrate from Microsoft Defender for Office 365 to Tessian. The migration process depends on your specific setup and the features you use. Both platforms offer APIs that can facilitate automated migration. Consider running both tools in parallel during the transition to ensure zero downtime.
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