eigen

Eigen is a self-hosted alternative to Google Workspace. It runs as a single server with integrated apps for email, file storage, documents, spreadsheets, presentations, drawings, kanban boards, calendar, contacts, and real-time chat — all sharing one API, one auth system, and one UI.

Why not Nextcloud?

Nextcloud is the established self-hosted workspace. It is mature, has a huge ecosystem, and if you need something proven today, it is the safer choice. Eigen is pre-1.0 and built by one person.

Eigen makes different choices:

• One codebase. Nextcloud is a core with apps and plugins. Eigen's apps are built together: one API, one auth system, one UI. Everything is designed to work with everything else.
• Collaboration is built in. In Nextcloud, collaborative editing comes from an external office server (Collabora or OnlyOffice). In Eigen, every app is collaborative through CRDTs (Yjs). Two people on the same document, sheet, or board works out of the box.
• Simple to run. One server, one compose file, SQLite per user. No PHP, no MySQL, no Redis. A backup is a file copy.

If Nextcloud works for you, keep using it. Eigen exists for people who want a workspace that feels like one product instead of a platform with plugins.