Mailfence

Mailfence is a secure, encrypted email and groupware service operated by ContactOffice Group, an independent Belgian company active in online collaboration tools since 1999 and based in Brussels. The product bundles encrypted mail, calendar, contacts, documents and groups, with built-in OpenPGP end-to-end encryption, digital signatures and IMAP/POP/CalDAV/CardDAV access. Servers run in Belgium under strict Belgian privacy law and are powered by 100% green energy. There is a free 500 MB plan; paid personal plans start at EUR 2.50/month and business plans at EUR 3.50/user/month.