: Running email clients from portable drives can leave cached data or temporary files on the host computer. For maximum security, Proton's official encrypted infrastructure is best accessed via their verified, installed apps or a secure, private browser session. How to get started with the Proton Mail desktop app
Let’s clarify what’s available, what’s not, and how to get as close as possible to a truly portable Proton Mail desktop experience. proton mail desktop app portable
Design and Implementation of a Portable ProtonMail Desktop App : Running email clients from portable drives can
A true portable app must replicate all three of these on a USB stick. Standard portable launchers (like Cameyo or ThinApp) often fail because they cannot virtualize the operating system's cryptographic API calls required by Proton's OpenPGP implementation. Design and Implementation of a Portable ProtonMail Desktop
It offers a specific "Portable" version for Windows (usually a .zip or .7z file).