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Tuta Desktop vs mailbox.org: catalog facts
Tuta Desktop	mailbox.org
Freemium A free account with limited storage and one address. Paid plans add custom domains…	Paid Subscription email and workspace service that can be tried before committing.
Windows, macOS, Linux	Web
End-to-end encrypts mail bodies, subject lines, calendar and contacts Password-protected messages to recipients who are not Tuta users	Email, storage, meetings and office tools in one account Data hosted in Germany under GDPR
No IMAP or SMTP, so third-party mail clients cannot be used A Tuta account is required; it is not a general mail client	A hosted service, not software you run yourself Requires a paid subscription after the trial
Downloadable app	Hosted service
Open source	Closed source
License: GPL-3.0	License not stated
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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