Office 365 E3 vs E5

Office 365 E3 and E5 share the same core productivity apps—Word, Excel, PowerPoint, Outlook, Teams, Exchange Online, and SharePoint—but the $15/month gap between them unlocks a fundamentally different security and compliance stack. E3 at $23/user/month is the workhorse plan most enterprises standardize on: full desktop apps, 50 GB mailboxes, unlimited OneDrive storage, and baseline data loss prevention.

E5 at $38/user/month adds 32 features concentrated in three areas: advanced threat protection (Defender for Office 365 Plan 2, Safe Attachments, Safe Links), compliance automation (advanced eDiscovery, Communication Compliance, Information Barriers, Records Management), and analytics (Power BI Pro, MyAnalytics Full). It also includes Audio Conferencing and Teams Phone at no additional cost.

The deciding factor is usually security posture. If your organization needs Defender for Office 365 Plan 2 ($5/user/month as an add-on), Safe Attachments, Attack Simulation Training, or any two of the advanced compliance features, E5 bundles them at a lower total cost than buying E3 plus individual add-ons.

E3 is the right fit for organizations that need the full Microsoft 365 desktop apps, Exchange Online, SharePoint, and Teams without advanced threat protection or compliance automation. If your security requirements are met by basic anti-spam, anti-malware, and standard DLP policies, E3 delivers excellent value at $23/user/month. Many organizations start with E3 and selectively upgrade security-critical users to E5 as compliance requirements grow.

E5 is built for organizations that need advanced email security, compliance tooling, or both. If you would otherwise buy E3 plus Defender for Office 365 Plan 2, Advanced eDiscovery, or Power BI Pro as add-ons, E5 is almost certainly cheaper. It is particularly compelling for regulated industries (finance, healthcare, legal) that need Communication Compliance, Information Barriers, Customer Lockbox, or Privileged Access Management. The inclusion of Audio Conferencing and Teams Phone adds further value for organizations consolidating their telephony stack.

If you need advanced threat protection or more than one premium compliance feature, E5 at $38/user/month is the better deal compared to E3 ($23) plus individual add-ons. For organizations with straightforward security needs and no regulatory compliance pressure, E3 remains the cost-effective choice at $15/month less per user.

What is the difference between Office 365 E3 and E5?

Both plans include the full suite of Office desktop apps, Exchange Online, SharePoint, OneDrive, and Teams. E5 adds 32 additional features focused on advanced security (Defender for Office 365 Plan 2, Safe Attachments, Safe Links, Attack Simulation Training), compliance (advanced eDiscovery, Communication Compliance, Information Barriers, Records Management, Customer Lockbox), analytics (Power BI Pro), and communication (Audio Conferencing, Teams Phone).

Is Office 365 E5 worth the extra $15 per month?

If your organization needs Defender for Office 365 Plan 2 and at least one advanced compliance feature, E5 is cheaper than buying them as E3 add-ons. Defender for Office 365 Plan 2 alone costs $5/user/month, and Power BI Pro is another $10/user/month. Those two add-ons on E3 would cost $38/month total, the same price as E5 which includes both plus 30 more features.

What security features does Office 365 E5 add over E3?

E5 adds Microsoft Defender for Office 365 Plan 2 (advanced anti-phishing, automated investigation and response), Safe Attachments (sandboxed file scanning), Safe Links (real-time URL scanning), Attack Simulation Training, Threat Explorer, Threat Trackers, Campaign Views, Compromised User Detection, and Office 365 Cloud App Security.

Does Office 365 E5 include Teams Phone?

Yes. Office 365 E5 includes Teams Phone (formerly Phone System), which enables PBX capabilities like call queues, auto attendants, voicemail, and PSTN connectivity. E3 does not include Teams Phone. E5 also includes Audio Conferencing for dial-in to Teams meetings, which is only available as a free add-on with E3.

What is the difference between Office 365 E5 and Microsoft 365 E5?

Office 365 E5 ($38/user/month) focuses on cloud productivity, security, and compliance for Office 365 services. Microsoft 365 E5 ($57/user/month) includes everything in Office 365 E5 plus Windows 11 Enterprise, Microsoft Intune (device management), Microsoft Defender for Endpoint Plan 2, and Microsoft Defender for Identity. Choose Office 365 E5 if you already manage Windows and endpoints separately; choose Microsoft 365 E5 for a unified platform.

Can I upgrade from Office 365 E3 to E5?

Yes. You can upgrade individual users or your entire organization from E3 to E5 through the Microsoft 365 admin center. The transition is seamless with no data loss or service interruption. You can also mix E3 and E5 licenses within the same tenant, assigning E5 to users who need advanced security or compliance features while keeping others on E3.