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Outlook4Gmail vs Proton Mail

Professional comparison and analysis to help you choose the right software solution for your needs.

Outlook4Gmail icon
Outlook4Gmail
Proton Mail icon
Proton Mail

Outlook4Gmail vs Proton Mail: The Verdict

⚡ Summary:

Outlook4Gmail: Outlook4Gmail is a browser extension that allows you to access your Gmail account from within Microsoft Outlook. It syncs your Gmail emails, contacts, and calendar into Outlook for convenient access.

Proton Mail: Proton Mail is an encrypted email service based in Switzerland that emphasizes privacy and security. It offers end-to-end encryption, anonymous sign up, self-destructing messages, and more features to protect user data and communications.

Both tools serve their respective audiences. Compare the features, pricing, and user ratings above to determine which best fits your needs.

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature Outlook4Gmail Proton Mail
Sugggest Score — —
Category Office & Productivity Security & Privacy
Pricing — Open Source

Product Overview

Outlook4Gmail
Outlook4Gmail

Description: Outlook4Gmail is a browser extension that allows you to access your Gmail account from within Microsoft Outlook. It syncs your Gmail emails, contacts, and calendar into Outlook for convenient access.

Type: software

Proton Mail
Proton Mail

Description: Proton Mail is an encrypted email service based in Switzerland that emphasizes privacy and security. It offers end-to-end encryption, anonymous sign up, self-destructing messages, and more features to protect user data and communications.

Type: software

Pricing: Open Source

Key Features Comparison

Outlook4Gmail
Outlook4Gmail Features
  • Sync Gmail emails, contacts and calendar to Outlook
  • Access Gmail from within Outlook
  • Schedule meetings and share calendars
  • Search emails stored locally
  • Offline support
Proton Mail
Proton Mail Features
  • End-to-end encryption
  • Anonymous sign-up
  • Self-destructing messages
  • Encrypted calendar and contacts
  • Custom email domains
  • Secure file storage and sharing
  • Two-factor authentication
  • Encrypted message search
  • Encrypted video calls
  • Secure email forwarding

Pros & Cons Analysis

Outlook4Gmail
Outlook4Gmail

Pros

  • Seamless integration with Outlook
  • Syncs emails, contacts and calendar
  • Works offline
  • Free version available

Cons

  • Requires manual syncing
  • Limited customization options
  • No support for tasks or notes
Proton Mail
Proton Mail

Pros

  • Strong focus on privacy and security
  • Based in privacy-friendly Switzerland
  • Open-source code for transparency
  • User-friendly interface
  • Variety of pricing plans to choose from
  • Supports multiple devices and platforms

Cons

  • Limited free storage space
  • Paid plans can be expensive for some users
  • Potential compatibility issues with some email clients
  • Limited customization options
  • Slower email delivery compared to some other providers

Pricing Comparison

Outlook4Gmail
Outlook4Gmail
  • Not listed
Proton Mail
Proton Mail
  • Open Source

Related Comparisons

Learn More About Each Product

Outlook4Gmail
Outlook4Gmail
Reviews, pricing & alternatives →
Proton Mail
Proton Mail
Reviews, pricing & alternatives →

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