Rallly
GroupwareSelf-hosted meeting and event scheduling polls
Replaces Doodle, When2meet
Best Lightweight Groupware for self-hosting
The 6 best Lightweight groupware you can self-host, ranked by community traction.
Radicale
GroupwareSimple, lightweight CalDAV and CardDAV server
Replaces Google Calendar, iCloud
Easy!Appointments
GroupwareOpen-source web appointment scheduler
Replaces Calendly, Acuity Scheduling
Baïkal
GroupwareLightweight CalDAV and CardDAV server with web admin
Replaces Google Calendar, iCloud
Davis
GroupwareModern admin interface for sabre/dav CalDAV server
Replaces Google Calendar, iCloud
Citadel
GroupwareAll-in-one groupware, mail and collaboration server
Replaces Microsoft Exchange, Microsoft 365
No apps match these filters.
Every option here is open-source and self-hostable, tagged Lightweight within the groupware category. Compare them on the individual app pages for setup difficulty and resource requirements.