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ProtonClient Luca Steccanella

bridge client cross-platform electron electron-plugins email encryption mail multiplatform nativefier privacy proton protonmail security swiss
Use this command to install ProtonClient:
winget install --id=Steccas.ProtonClient -e

ProtonClient is an unofficial desktop client for ProtonMail built using Electron Nativefier. Designed to provide a seamless and secure email experience, it allows users to access their ProtonMail accounts directly from a dedicated application without relying on a browser or intermediary software like Proton Bridge.

Key Features:

  • Desktop Notifications: Receive real-time alerts when new emails arrive.
  • Persistent Login: Maintains login credentials across app restarts and OS reboots, ensuring uninterrupted access.
  • Proton Calendar & Contacts Integration: Access ProtonMail’s built-in calendar and contacts directly from the client.
  • Zero-Access Encryption: Ensures your data remains securely encrypted, aligning with ProtonMail's privacy-first approach.
  • Cross-Platform Support: Available for Windows, Linux, and macOS 64-bit systems.
  • No Local Email Storage: Functions like a browser-based client, storing only login cookies.

Audience & Benefit: Ideal for individuals who prioritize privacy and security, such as journalists, activists, or anyone seeking secure communication. ProtonClient offers a user-friendly alternative to browser access or buggy intermediary software, enabling direct, encrypted email management with desktop convenience.

Available via winget for easy installation, ProtonClient is a reliable choice for those seeking a dedicated, privacy-focused email client.

README

ProtonClient

An unofficial desktop client for ProtonMail done with electron nativefier. I just did it because I didn't want to open the browser every time I wanted to check my protonmail, I don't like to use Proton Bridge which is buggy, and I prefer to access protonmail without an intermediary software while keeping desktop notifications and a dedicated app.

Go here for further information about ProtonMail.

GitHub repo size GitHub language count GitHub top language GitHub last commit

Community and support

It is a very new project, but it can grow and get way better, if you want to help please leave a star 🌟 and share it with your friends. You can also start contributing now! If you wish to do so please feel free to fork the project and propose modifications that we can merge. The more we are the better!

You can also consider a donation and remember to check my links.

A coffee is always a gesture of LOVE ❤️

About the app

The app is currently released for Windows, Linux, and Mac 64bit. Unfortunately, I can't test the Mac version, so feel free to notify any problems.

The app will remain opened in the system tray and will prompt a notification when you will receive a new mail.

From the app you will be able to use Proton Calendar and Proton Contacts.

Most notably, the account login is persistent between app restart, including OS reboots. Of course, if you don't log off before closing it.

The client, unlike when using the bridge and so SMTP client, will not work with the mail locally; this means that it is like using Proton Mail from the browser.

screenshot-Linux

About ProtonMail

What is ProtonMail?

ProtonMail is the first service that introduced email encryption to the public, it is a project born directly from CERN members that wanted to allow people like dissidents, journalists, independent reporter, or anyone subject to censorship to have access to a secure email service, potentially protecting democracy. ProtonMail has evolved then and has become one of the best e-mail providers for anyone, like me, that pays attention to his privacy and enjoys end-to-end encryption in his communications.

Versions
1.2.3
1.2.2
1.2.1
1.2.0
Website
github.com
License
Last updated
5/15/2025
Download latest version

ProtonMail uses end-to-end encryption and zero-access encryption to protect user data. If a server only contains encrypted messages, users have a much higher level of security in the event of a data breach. The use of encryption also prevents ProtonMail from being able to decrypt, read, or share user emails with third parties. ProtonMail does not receive funding through advertising, so we have no incentive to spy on users or build detailed user profiles. ProtonMail’s security extends beyond just strong encryption and includes features designed to mitigate human vulnerabilities, such as two-factor authentication and anti-phishing safeguards.

Furthermore, the Swiss Laws protects your data from anyone who will want to access your data, including governments, it just prohibits them to do so.

Most importantly, they don't use ads, so they aren't selling your data. They simply make money with their convenient paid plans, don't worry there is also a free plan for starters.

Recently they created a VPN service (ProtonVPN) which may be even more when useful paired with a secure mail provider.

Anyways if you need further information or need to subscribe (in fact you need to subscribe to use this client lol) go here.

Security notice about this client

You can verify via the building process and source that I am using the legit ProtonMail link, regarding any other security concern ProtonMail is one of the most trusted and secure mail providers; furthermore, this client is just like having ProtonMail in a Chrome window. This means that you are not going to store any mail on your PC. Like in browser, you're going to storage your login cookies anyways that's why I always recommend encrypting your disk because every software will leave some traces! Unlike many others unofficial clients, it doesn't ask for your 2FA secrets which shouldn't be never gave away.

Install

Please head to the release section to find ready to use installers for Windows, Linux distros and Mac.

Build

To build this client you need to set up and install Node.js and Nativefier. Once Node.js is installed, simply run the npm install command in the repository's root folder to install Nativefier. Once that's done, you will be able to run the build scripts below.

You can build it from Windows, Linux, or Mac, but you will need wine or Windows to build it for Windows. Please refer to Nativefier's documentation for more information.

Windows

When everything has been set up, run from PowerShell:

node .\proton_client_win.js

Once it finishes, you will have a build folder ready to use.

You can also build for Linux or Mac using:

node .\proton_client_linux.js

or

node .\proton_client_mac.js

Linux

I created a small bash script for Linux to make the build faster. Just run build.sh from your shell with one of these arguments:

--win

To build for Windows

--linux

To build for Linux

--mac

To build for Mac

--all

To build for all the platforms.

Mac

I don't own a Mac but using node via terminal you should be able to build exactly like in Windows or Linux.

License

MIT

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