# Microsoft Defender for Office 365 vs Proton Mail - 2026 Comparison - Software Advice

> Microsoft Defender for Office 365 vs Proton Mail - See how these products stack up against each other with real user reviews, product feature comparisons and screenshots. Find out which one is best for your organization.

Source: https://www.softwareadvice.com/anti-spam/microsoft-defender-for-office-365-profile/vs/protonmail

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Microsoft Defender for Office 365 vs Proton Mail

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# Microsoft Defender for Office 365 vs Proton Mail: Which is best for you?

Updated June 2, 2026

[Microsoft Defender for Office 365](https://www.softwareadvice.com/anti-spam/microsoft-defender-for-office-365-profile/)

4.6 [(238)](https://www.softwareadvice.com/anti-spam/microsoft-defender-for-office-365-profile/reviews/)

[Proton Mail](https://www.softwareadvice.com/email-security/protonmail-profile/)

4.5 [(122)](https://www.softwareadvice.com/email-security/protonmail-profile/reviews/)

Add to Compare

Starting Price

Pricing available upon request

$6.99

per month

Free Trial

Free Version

Screenshots  
and Demo

See all

See all

Top Rated  
  Features

Real-Time Monitoring

4.67

Whitelisting/Blacklisting

4.63

Policy Management

4.60

See All

Encryption

4.61

Threat Protection

4.56

Email Attachment Protection

4.50

See All

Integrations

See All

Microsoft Outlook

Thunderbird

Rambox

See All

Pros / Cons

-   It significantly reduces spam, phishing attempts, and malicious email threats while providing administrators with useful visibility into security events.
    
-   The one thing I don’t like the most is file syncing. While syncing files a very slow performance with file version conflicting.
    

Read more

-   Encrypted, elegant, effective email and all in a trusted ecosystem.
    
-   It was decent experience when operating a single account but as soon as I opened more and more accounts the experience turned real annoying, as I needed to keep switching the mail accounts and refresh every single time.
    

Read more

Ease-of-Use

Highest performing feature  
in the comparison

4.5/ 5

4.4/ 5

Value for Money

Highest performing feature  
in the comparison

4.5/ 5

4.3/ 5

Customer Support

Highest performing feature  
in the comparison

4.3/ 5

4/ 5

Functionality

Highest performing feature  
in the comparison

4.5/ 5

4.3/ 5

Support Options

Email/Help Desk

FAQs/Forum

Knowledge Base

Phone Support

24/7 (Live Rep)

Chat

Email/Help Desk

FAQs/Forum

Knowledge Base

Phone Support

24/7 (Live Rep)

Chat

Training Options

In Person

Live Online

Webinars

Documentation

Videos

In Person

Live Online

Webinars

Documentation

Videos

FrontRunners

FrontRunners 2022

N/A

Advisor  
  Recommendations

N/A

N/A

Ideal Customer Size

Small

Medium

Large

Small

Medium

Large

Deployment Options

Cloud, SaaS, Web-Based

Desktop - Mac

Desktop - Windows

Desktop - Linux

Desktop - Chromebook

On-Premise - Windows

On-Premise - Linux

Mobile - Android

Mobile - iPhone

Mobile - iPad

Cloud, SaaS, Web-Based

Desktop - Mac

Desktop - Windows

Desktop - Linux

Desktop - Chromebook

On-Premise - Windows

On-Premise - Linux

Mobile - Android

Mobile - iPhone

Mobile - iPad

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