Have you tried the ProtonMail Windows app? Share your experience in the comments below (or securely via Proton Mail, of course).
| Metric | Web Version (Chrome) | Windows App | |--------|----------------------|--------------| | RAM idle | ~180MB | ~220MB | | RAM with large mailbox | ~350MB | ~310MB | | CPU background sync | 0-1% | 0-2% | | Launch time (cold) | 2.1s (browser first) | 1.3s | | Search speed (10k emails) | 1.2s | 0.9s | protonmail app for windows
proton.me/mail/download
High CPU usage during sync. Fix: This usually happens on first sync of a large mailbox (over 20,000 emails). Let it complete; subsequent syncs are incremental and lightweight. Have you tried the ProtonMail Windows app
In late 2023 and through 2024, Proton finally addressed this gap by releasing a full-fledged . Built using modern Electron technology (the same framework behind apps like Discord, Slack, and Visual Studio Code), this app brings Switzerland’s most famous encrypted email service directly to your taskbar. Fix: This usually happens on first sync of
For years, privacy-conscious Windows users had a frustrating workaround: accessing ProtonMail exclusively through a web browser. While functional, this method lacked deep OS integration, offline capabilities, and the seamless feel of a dedicated application.