Skip to content
EN

Software · Office & notes

Proton Mail Bridge

Seamlessly encrypts and decrypts your mail as it enters and leaves your computer.

  • Limited free plan
  • Windows and Linux
  • Open source
  • No account

Overview

Features described on its official website and in its Winget manifest: end-to-end encryption.

Services and protocols mentioned: IMAP and SMTP.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Our Bridge app allows you to add our end-to-end encryption to popular email apps, including Outlook, Thunderbird, and Apple Mail.” — official website, 10 November 2026

At a glance

Proton Mail Bridge offers a limited free plan; advanced features or heavier use are paid.

Its licence (GPL-3.0) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Plans and conditions

  • Free plan: basic features are free; others are reserved for paid plans.
  • Paid subscriptions from 3,99 $ per month (price read on the official page).

Strengths

  • Open source code
  • No account needed
  • No credit card asked
  • Commercial use allowed

Weaknesses

  • Limited free plan

About

The Proton Mail Bridge is an application for paid users that runs on your computer in the background and seamlessly encrypts and decrypts your mail as it enters and leaves your computer. It allows for full integration of your Proton Mail account with any program that supports IMAP and SMTP such as Microsoft Outlook, Mozilla Thunderbird and Apple Mail.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from Official plan pages (pricing, licence, terms) (limits, free status, commercial use) —
  • Facts collected from Winget (Windows Package Manager) (credit card, account, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 6 November 2026
  • Description from Flathub — AppStream (Flathub)

How listings are built →

Do you develop Proton Mail Bridge?

Correct this listing with the report form, or cite it with this optional badge (it shows the verified free status and changes nothing in the ranking):

<a href="https://licitpro.fr/en/resource/proton-mail-bridge"><img src="https://licitpro.fr/badge/proton-mail-bridge.svg?l=en" alt="Listed on LicitPro" height="20"></a>

Developers and publishers →

In the same category

ONLYOFFICE Desktop Editors

Software · Open source

ONLYOFFICE Desktop Editors is an office suite, available on Windows, macOS, Linux, Android and iOS: word processing, spreadsheets and presentations (slide shows).

Completely freeWinMacLinuxAndroidiOS

LibreOffice

Software · Open source

LibreOffice is an office suite, available on Windows, macOS, Linux and Android: word processing, spreadsheets and presentations (slide shows).

Completely freeWinMacLinuxAndroid

Obsidian

Software

Obsidian is a note-taking program, available on Windows and Linux: Markdown support, plugins and add-ons, hardware acceleration.

Completely freeWinLinux

WPS Office

Software

WPS Office is an office suite, available on Windows and Linux.

Limited free planWinLinux

PDF Arranger

Software · Open source

PDF Arranger is a PDF toolkit, available on Windows and Linux: PDF merging, PDF splitting and page extraction.

Completely freeWinLinux

Foliate

Software · Open source

Foliate is an e-book reader, available on Linux.

Completely freeLinux