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Runbox vs Mailfence: catalog facts
Runbox	Mailfence
Paid Paid subscription after a free 30-day trial.	Freemium A free account is available, with paid plans for more features.
Web	Android, iOS, Web
Data hosted in Norway under Norwegian privacy law and GDPR No advertising	OpenPGP encryption and signing in the browser Standard IMAP, POP and SMTP access
No free plan after the trial Hosted service, so you rely on the provider for your mail	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 24, 2026	Official website Full listing and sources Checked September 23, 2026

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