A "portable" application is software that does not require installation on a computer's operating system. Instead, it runs from a USB drive or a dedicated folder, leaving no trace (like registry entries or configuration files) on the host computer.
Launch the portable browser and clear all history, setting it to always open to mail.proton.me .
Portability introduces unique physical and digital risks. Guard your data with these essential security steps: 1. Encrypt Your USB Hardware proton mail desktop app portable
For users specifically needing a portable solution (e.g., to run from a USB drive), third-party open-source projects exist. However, these are not endorsed by Proton , and users should exercise caution regarding security. ElectronMail
Uses Proton’s full web interface; perfectly secure; no third-party software. Cons: Slower than a native app; consumes more RAM. A "portable" application is software that does not
Proton Mail’s primary interface is a web app (mail.proton.me). To create a desktop app, Proton Technologies AG offers two official solutions:
Currently, Proton Mail offers the "Bridge," an application that acts as a local server, encrypting and decrypting emails on the fly so they can be used with standard desktop clients like Outlook, Apple Mail, or Thunderbird. While the Bridge is powerful, it is inherently heavy and system-dependent. It requires installation, configuration of system ports, and integration with the operating system’s security certificates. Portability introduces unique physical and digital risks
Using a portable configuration provides several distinct advantages for security-conscious users on the move:
Since the native portable app doesn't exist, here is how to achieve the functionality of a portable Proton Mail client.
Note: You must manually update this container regularly to patch underlying Chromium vulnerabilities. Security and Privacy Trade-offs of Portable Apps