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Microsoft Defender for Office 365 vs Proton Mail

Updated January 30, 2026

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

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Starting Price

Pricing available upon request

$6.99

per month

Free Trial
Free Version
Screenshots
and Demo
Product Screenshot
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Product Screenshot
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Top Rated
  Features
Real-Time Monitoring
4.71
Whitelisting/Blacklisting
4.63
Policy Management
4.60
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Encryption
4.63
Threat Protection
4.52
Email Attachment Protection
4.50
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Integrations
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Microsoft Outlook
Microsoft Outlook
Thunderbird
Thunderbird
Rambox
Rambox
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Pros / Cons
  • It’s often praised for giving organizations confidence that inboxes are protected with real-time scanning and advanced threat intelligence.
  • The process for logging into different devices is a bit complicated and time consuming.
Read more
  • I like that ProtonMail doesn’t track me or read my emails, which is important when I’m dealing with lead lists or supplier conversations.
  • There’s no real integration with tools like ActiveCampaign (my email solution) or Google Sheets (my data solution), which makes it harder for me to slip it into my broader marketing stack.
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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
4.2/ 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