productivity

Hostpoint E-Mail & Cloud Office

Switzerland

Swiss custom-domain email and Open-Xchange Cloud Office (calendar, Drive, docs) from Hostpoint AG, with mailboxes and data hosted in Switzerland.

LibreOffice

Germany

Free open-source desktop office suite from The Document Foundation (Berlin): Writer, Calc, Impress, Draw, Base, and Math, with native ODF and strong OOXML interoperability.

Mailfence

Belgium

Belgian secure email suite with browser-side OpenPGP encryption, digital signatures, calendar, documents, and optional custom domains under ContactOffice Group SA.

Mailo

France

French freemium webmail and Mail&Cloud suite (MAILO SAS): email, calendar, cloud disk, Mailo Junior for children, and Pro custom domains—hosted in France, proprietary SaaS.

Nextcloud

Germany

Open-source, self-hosted content collaboration Hub from Nextcloud GmbH (Germany): Files, Talk, Groupware, Office, local AI Assistant, and Flow—an on-prem alternative to Microsoft 365-style suites.

mailbox (formerly mailbox.org)

Germany

German paid digital workplace from Heinlein Hosting GmbH: secure email with PGP/S/MIME, Drive, browser Office, Meet, and business Admin on dual Berlin data centres.