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Mailo vs Runbox: catalog facts
Mailo	Runbox
Freemium Free sign-up, with a paid Pro offer for businesses and organisations.	Paid Paid subscription after a free 30-day trial.
Android, Web	Web
Data stored on servers in France and not used or sold Choice of address domain	Data hosted in Norway under Norwegian privacy law and GDPR No advertising
Mainly aimed at French-speaking users No end-to-end encryption mentioned	No free plan after the trial Hosted service, so you rely on the provider for your mail
Downloadable app, 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 October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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