📅

Calendar & Contacts

Replaces: Google Calendar, iCloud

Free calendar and contact management with open standards like CalDAV and CardDAV. Independent alternatives to Google Calendar and iCloud.

🛡️ 4 Open Source Tools

Nextcloud Calendar

Integrated calendar management within the Nextcloud platform

AGPL-3.0 ● Easy Self-hostable
Google Calendar iCloud Calendar
Last: Feb 2026 1.1k
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Radicale

Lightweight CalDAV and CardDAV server

GPL-3.0 ●● Medium Self-hostable
Google Calendar iCloud Calendar
Last: Feb 2026 3.3k
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Baikal

Lean CalDAV and CardDAV server with web interface

GPL-3.0 ● Easy Self-hostable
Google Calendar iCloud Calendar
Last: Feb 2026 2.6k
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EteSync

End-to-end encrypted calendar and contact synchronization

AGPL-3.0 ●● Medium Self-hostable
Google Calendar iCloud Calendar
Last: Feb 2026 1.5k
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