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Posteo vs Mailfence: catalog facts
Posteo	Mailfence
Paid 1 euro per month, with paid upgrades for storage and aliases.	Freemium A free account is available, with paid plans for more features.
Web	Android, iOS, Web
Signup without personal details Low fixed monthly price	OpenPGP encryption and signing in the browser Standard IMAP, POP and SMTP access
No free tier 4 GB base storage	Hosted service only Advanced features sit on paid plans
Web application, Hosted service	Downloadable app, 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.