Nextcloud Calendar is the scheduling module of the Nextcloud groupware suite, giving you a full-featured calendar that runs entirely on hardware you control. Because it speaks the open CalDAV standard, your events sync cleanly to Thunderbird, Apple Calendar, and Android clients like DAVx⁵ without routing anything through Google or Microsoft. It handles shared calendars, free/busy availability, appointment booking, and ICS import/export, and ties into Nextcloud contacts, mail, and file sharing. The trade-off is that you (or your host) are responsible for running and securing the server and events are stored unencrypted there rather than end-to-end encrypted. It is released under the AGPL and remains actively developed, with the 6.x series shipping through 2026.
Nextcloud Calendar
Self-hosted CalDAV calendar for your own Nextcloud server.
apps.nextcloud.comFreeOpen SourceWebGermany
PricingFree and open source; you supply the Nextcloud server yourself or pay a third-party Nextcloud hosting provider.
Strengths
- Fully open source and self-hosted so no vendor sees your schedule
- Standards-based CalDAV syncs with virtually any client
- Integrates with Nextcloud contacts, mail, and file sharing
- Free of subscription fees when self-hosted
Considerations
- Requires running and maintaining a Nextcloud server
- Data is stored unencrypted on the server, not end-to-end encrypted
- Web app responsiveness depends on your server hardware
Listed inCalendars
