Proton Desktop App 〈PRO〉

Not officially released as a stable desktop app. You can:

Here's a step-by-step overview of how the Proton desktop app works: proton desktop app

The ecosystem represents a major shift for the privacy-focused Swiss company, moving beyond web browsers to provide a more secure, integrated, and high-performance experience on Windows, macOS, and Linux. While Proton initially focused on web-based and mobile access, 2024 and 2026 have seen a massive expansion of native desktop clients designed to replace traditional tools like Outlook and Gmail. The Evolution: Why a Native Desktop App? Not officially released as a stable desktop app

The app is fast, responsive, and reliable, with no noticeable lag or crashes. It's clear that the Proton team has put a lot of effort into optimizing the app for performance. and high-performance experience on Windows