Microsoft Defender for Office 365

How it plugs in

Signal on Email Spam Filtering Software5.3#4 of 11

Defender for Office 365 helps stop phishing, business email compromise, and malware before they reach a team.

Pricing

• Microsoft Defender for BusinessPaid yearly; annual subscription auto-renews. · Up to 300 users · Up to five devices per user · No minimum device requirement$3/mo
• Microsoft Entra Internet AccessAnnual subscription—auto renews · Secure employee access to internet, AI, and SaaS apps · Protect against internet threats$5/mo
• Microsoft Entra SuiteAnnual subscription—auto renews · Includes Secure Web and AI Gateway capabilities · Continuous, adaptive Conditional Access · Identity governance and real-time risk detection$12/mo
• Microsoft Defender for Office 365 (Plan 1)$2.00 user/month, paid yearly; annual commitment · Email, Teams, SharePoint, OneDrive protection · malicious links and QR codes · zero-day malware protection · internal email protection · real-time reporting$2
• Microsoft Defender for Office 365 (Plan 2)$5.00 user/month, paid yearly; annual commitment · Plan 1 features · cyberthreat hunting · attack simulation training · automated investigation and response · cross-domain XDR capabilities$5

As microsoft.com lists them, checked 20 Sept 2026.