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Mailfence vs Posteo: catalog facts
Mailfence	Posteo
Freemium A free account is available, with paid plans for more features.	Paid 1 euro per month, with paid upgrades for storage and aliases.
Android, iOS, Web	Web
OpenPGP encryption and signing in the browser Standard IMAP, POP and SMTP access	Signup without personal details Low fixed monthly price
Hosted service only Advanced features sit on paid plans	No free tier 4 GB base storage
Downloadable app, Web application, Hosted service	Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Not stated if it works offline	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.