Colanode
GroupwareCollaboration suite with real-time messaging, rich text pages, file
Best Free Groupware for self-hosting
The 16 best Free groupware you can self-host, ranked by community traction.
Twake Workplace
GroupwareOpen-source digital workplace and collaboration suite
Replaces Microsoft Teams, Slack
Nextcloud Deck
GroupwareKanban-style project planning inside Nextcloud
Replaces Trello
Cozy
GroupwarePersonal cloud platform with contacts and calendar
Replaces Google Workspace
Twake Drive
GroupwareOpen-source collaborative file storage and workspace
Replaces Google Drive, Microsoft OneDrive
Openmeetings
GroupwareVideo conferencing, instant messaging, whiteboard, collaborative
Horde Groupware
GroupwarePHP groupware suite with webmail and calendaring
Replaces Microsoft Exchange
DAViCal
GroupwareServer for sharing calendars and address books via DAV
Replaces Google Calendar, Microsoft Exchange
Kontact
GroupwareIntegrated personal information manager for KDE
Replaces Microsoft Outlook
Kolab Groupware
GroupwareOpen-source groupware server with mail and calendaring
Replaces Microsoft Exchange, Zimbra
Feng Office
GroupwareWeb-based collaboration and project management suite
Replaces Basecamp, Microsoft Project
Citadel
GroupwareAll-in-one groupware, mail and collaboration server
Replaces Microsoft Exchange, Microsoft 365
Cozy Contacts
GroupwareContacts management app for the Cozy personal server
Replaces Google Contacts
Digiwall
GroupwareCreate multimedia collaborative walls for in-person or remote work
Cozy Cloud
GroupwarePersonal cloud where you can manage and sync your files, notes,
Zimbra Collaboration
GroupwareEmail, calendar, collaboration server with Web interface and lots of
No apps match these filters.
Every option here is open-source and self-hostable, tagged Free within the groupware category. Compare them on the individual app pages for setup difficulty and resource requirements.