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Best Single-User Calendar & Contacts for self-hosting

The 5 best Single-User calendar & contacts you can self-host, ranked by community traction.

khal

Calendar & Contacts

Command-line calendar built on CalDAV

Replaces Google Calendar

★ 3k Medium setup MIT

ETAR

Calendar & Contacts

Open-source calendar server companion for events

Replaces Google Calendar

★ 2.6k Medium setup GPL-3.0

calcurse

Calendar & Contacts

Text-based calendar and scheduling application

Replaces Google Calendar

★ 1.3k Easy setup BSD-2-Clause

Xandikos

Calendar & Contacts

Git-backed CalDAV and CardDAV server

Replaces Google Calendar, iCloud

★ 593 Medium setup GPL-3.0

GNOME Calendar

Calendar & Contacts

Simple desktop calendar with CalDAV support

Replaces Google Calendar

★ 300 Easy setup GPL-3.0

Every option here is open-source and self-hostable, tagged Single-User within the calendar & contacts category. Compare them on the individual app pages for setup difficulty and resource requirements.