Runbox is an email service from Runbox Solutions AS in Oslo, Norway, for individuals and organisations. Besides webmail, it offers access via POP, IMAP, SMTP, CardDAV and CalDAV, use of your own domain name, aliases, file storage, and tools for importing email, contacts and calendars. Security measures include two-factor authentication, TLS encryption in transit and full disk encryption; end-to-end PGP encryption is possible in the browser. Runbox is delivered as a hosted service.
According to the company, Runbox is independent and employee-owned. It says its servers are in Norway, in a data centre originally built for the Norwegian government, and are subject to Norwegian law. Norway is not an EU member state but belongs to the EEA. The company says its servers run on renewable electricity, which is its own claim. The code of the Runbox 7 webmail client is published on GitHub under GPLv3; the full backend is not open source.