Cal.diy
Calendar & ContactsOnline appointment scheduling system
Best Free Calendar & Contacts for self-hosting
The 36 best Free calendar & contacts you can self-host, ranked by community traction.
OpnForm
Calendar & ContactsBeautiful open-source form builder
khal
Calendar & ContactsCommand-line calendar built on CalDAV
Replaces Google Calendar
Open Event Server
Calendar & ContactsSelf-hosted event management and ticketing backend
Replaces Eventbrite, Sched
Tasks.org CalDAV Sync
Calendar & ContactsOpen-source calendar and task sync client for Android
Replaces Google Calendar Sync, iCloud sync
ETAR
Calendar & ContactsOpen-source calendar server companion for events
Replaces Google Calendar
vdirsyncer
Calendar & ContactsSynchronize calendars and contacts via CalDAV/CardDAV
Replaces iCloud sync
Bracket
Calendar & ContactsFlexible tournament system to build a tournament setup, add teams,
Alf.io
Calendar & ContactsTicket reservation system
calcurse
Calendar & ContactsText-based calendar and scheduling application
Replaces Google Calendar
OpenCalendar Sync
Calendar & ContactsSelf-hosted shared calendar with public event pages
Replaces Calendly, Google Calendar
AgenDAV
Calendar & ContactsCalDAV web client with an Ajax interface
Replaces Google Calendar
Meeting scheduler nono Booked
Calendar & ContactsResource scheduling and reservation system
Replaces Skedda, Acuity Scheduling
Claper
Calendar & ContactsThe ultimate tool to interact with your audience (alternative to
DavMail
Calendar & ContactsPOP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway allowing users to
Nextcloud Tasks
Calendar & ContactsCalDAV task list app for Nextcloud
Replaces Google Tasks, Todoist
Decsync Calendar Sync
Calendar & ContactsFile-based calendar and contacts synchronization
Replaces Google Calendar
OpenSlides
Calendar & ContactsPresentation and assembly system for managing and projecting agenda,
Manage My Damn Life
Calendar & ContactsManage my Damn Life (MMDL) is a self-hosted front end for managing
Framadate
Calendar & ContactsOnline polling and meeting scheduling tool
Replaces Doodle
Thunderbird Appointment
Calendar & ContactsSelf-hostable scheduling tool for booking meetings
Replaces Calendly, Doodle
Scheduling poll nono Nuages
Calendar & ContactsSelf-hosted meeting poll and availability finder
Replaces When2meet, Doodle
Tasks.org Server alt nono Calendarserver
Calendar & ContactsStandards-compliant calendar and scheduling server
Replaces Google Calendar, Exchange
hitobito
Calendar & ContactsManage complex group hierarchies with members, events and a lot more
ClearFlask
Calendar & ContactsCommunity-feedback tool for managing incoming feedback and
Christmas Community
Calendar & ContactsCreate a simple place for your entire family to use to find gifts that
EteSync DAV
Calendar & ContactsLocal CalDAV bridge for EteSync encrypted accounts
Replaces iCloud Calendar
Bitpoll
Calendar & ContactsConduct polls about dates, times or general questions
Seatsurfing
Calendar & ContactsWebbased app to book seats, desks and rooms for offices
GNOME Calendar
Calendar & ContactsSimple desktop calendar with CalDAV support
Replaces Google Calendar
Meetable
Calendar & ContactsMinimal events aggregator
Revel
Calendar & ContactsCommunity-focused event management and ticketing platform
KOrganizer
Calendar & ContactsCalendar and scheduling component of KDE Kontact
Replaces Outlook Calendar
InfCloud
Calendar & ContactsWeb client for CalDAV and CardDAV servers
Replaces Google Calendar web
Horde Kronolith
Calendar & ContactsCalendar application from the Horde groupware suite
Replaces Google Calendar, Exchange
Digistorm
Calendar & ContactsCreate collaborative surveys, quizzes, brainstorms, and word clouds
No apps match these filters.
Every option here is open-source and self-hostable, tagged Free within the calendar & contacts category. Compare them on the individual app pages for setup difficulty and resource requirements.