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Fastmail vs mailbox.org: catalog facts
Fastmail	mailbox.org
Paid Paid subscription with a 30-day free trial that needs no credit card.	Paid Subscription email and workspace service that can be tried before committing.
Android, iOS, Web	Web
Email, calendar and contacts in one service Choice of EU or USA data residency	Email, storage, meetings and office tools in one account Data hosted in Germany under GDPR
No free plan after the trial Hosted service, so your mail lives on Fastmail's servers	A hosted service, not software you run yourself Requires a paid subscription after the trial
Downloadable app, Web application, Hosted service	Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Not stated if it works offline	Needs internet
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.