Save your credentials inside the portable browser's encrypted password manager if desired.
Running the mail client on a corporate laptop where you lack administrative rights to install software.
Open VeraCrypt, mount your encrypted container as a local virtual drive letter (e.g., Drive X:). proton mail desktop app portable
is an open-source, unofficial desktop client for Proton Mail and Tutanota. It can be configured to run in portable mode.
A portable Proton Mail desktop app setup gives you the ultimate combination of world-class security and total digital mobility. By leveraging PortableApps with either Thunderbird Bridge or a sandboxed portable web browser, you can access your encrypted inbox from any Windows PC on earth without leaving a single trace of your private data behind. is an open-source, unofficial desktop client for Proton
Proton Mail has dedicated desktop applications for Windows, macOS, and Linux (Linux version is currently in beta). This app provides the full Proton Mail and Calendar experience. However, it requires a standard installation on your computer. It is not designed to be run from a USB drive. The app is available for paid Proton plans, with a 14-day free trial for free accounts.
Proton Mail, however, is not a traditional email client. It is a web-based encrypted service. This creates unique technical hurdles. By leveraging PortableApps with either Thunderbird Bridge or
Click the browser's main menu button (three vertical dots in the top right corner).
No, Proton does not currently distribute an official portable executable ( .exe or .app ) for its desktop client.
Some third-party tools attempt to repackage the official Proton Mail desktop app into a portable format using launchers like or Enigma Virtual Box . However:
This method is secure, functional, and doesn't rely on unofficial software or complex setups.