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Google Calendar vs Nextcloud Calendar: catalog facts
Google Calendar	Nextcloud Calendar
Free Free with a Google account.	Free Free app for Nextcloud servers.
Web	Web, Self-hosted
Free to use Syncs across devices	Calendars stay on your own server CalDAV sync with standard clients
Requires a Google account Data is stored on Google's servers	Requires a running Nextcloud server Not a standalone app
Web application, Hosted service	Self-hosted
Closed source	Open source
License not stated	License not stated
Account needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.