Microsoft Defender for Office 365 pricing
3 plans read from microsoft.com
Microsoft Defender for Business$3 a month Paid yearly; annual subscription auto-renews.Up to 300 users · Up to five devices per user · No minimum device requirement Read 20 Sep 2026 · microsoft.com
Microsoft Entra Internet Access$5 a month Annual subscription—auto renewsSecure employee access to internet, AI, and SaaS apps · Protect against internet threats Read 22 Sep 2026 · microsoft.com
Microsoft Entra Suite$12 a month Annual subscription—auto renewsIncludes Secure Web and AI Gateway capabilities · Continuous, adaptive Conditional Access · Identity governance and real-time risk detection Read 22 Sep 2026 · microsoft.com
In short
- Microsoft Defender for Office 365 lists no free plan.
- Paid plans published: 3, from $3 a month.
What the alternatives costAll alternatives →
| Tool | From | Free plan | Free trial |
|---|---|---|---|
| Darktrace / EMAIL | — | No | No |
| SpamTitan Gateway | — | No | Yes |
| Cloudflare | $7/mo | Yes | No |
| Abnormal Security | — | No | No |
| Hornetsecurity 365 Total Protection | — | No | No |
| Check Point Harmony Email & Collaboration | — | No | No |
| Mimecast Email Security | — | No | No |
| Sophos Email | — | No | No |