Self-Hosted Index

Alternatives

Google Calendar

Calendaring tied to a Google account, free because it anchors the account.

4 self-hosted replacements in this index, ranked by GitHub stars in the dataset.

Replacements

  • Nextcloud

    Access and share your files, calendars, contacts, mail and more from any device, on your terms.

    37,389 stars Active

    2 Nov 2026 v35.0.2

  • Radicale

    Simple calendar and contact server with extremely low administrative overhead.

    5,170 stars Active

    1 Nov 2026 v3.9.0

  • SOGo

    SOGo offers multiple ways to access the calendaring and messaging data. CalDAV, CardDAV, GroupDAV, as well as ActiveSync, including native Outlook compatibility and Web interface.

    2,182 stars Active

    1 Nov 2026 SOGo-5.12.12

  • DAViCal

    Server for calendar sharing (CalDAV) that uses a PostgreSQL database as a data store.

    112 stars Active

    27 May 2026

Popular comparisons

The most-starred pairings among these replacements, ranked by combined GitHub stars in the dataset.