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mailbox.org vs Proton Mail: catalog facts
mailbox.org	Proton Mail
Paid Subscription email and workspace service that can be tried before committing.	Freemium Free accounts work in the mobile and web apps; the desktop apps are offered as a free…
Web	Windows, macOS, Linux, Android, iOS, Web
Email, storage, meetings and office tools in one account Data hosted in Germany under GDPR	End-to-end encrypted email by default Apps for iOS, Android, macOS, Windows, Linux and the web
A hosted service, not software you run yourself Requires a paid subscription after the trial	Only works with a Proton account Desktop apps need a paid plan after the trial
Hosted service	Downloadable app, Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.