Compare software

Tuta Desktop vs Fastmail: catalog facts
Tuta Desktop	Fastmail
Freemium A free account with limited storage and one address. Paid plans add custom domains…	Paid Paid subscription with a 30-day free trial that needs no credit card.
Windows, macOS, Linux	Android, iOS, Web
End-to-end encrypts mail bodies, subject lines, calendar and contacts Password-protected messages to recipients who are not Tuta users	Email, calendar and contacts in one service Choice of EU or USA data residency
No IMAP or SMTP, so third-party mail clients cannot be used A Tuta account is required; it is not a general mail client	No free plan after the trial Hosted service, so your mail lives on Fastmail's servers
Downloadable app	Downloadable app, Web application, Hosted service
Open source	Closed source
License: GPL-3.0	License not stated
Account needed	Account needed
Needs internet	Not stated if it works offline
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.