Best Self-Hosted Google Calendar Alternatives in 2026
Google Calendar is a scheduling and calendar application with event planning, reminders, and Google Workspace integration.
10 Self-Hosted Alternatives to Google Calendar
Cal.com
41KCal.com is the open-source scheduling platform for individuals and teams — a fully customizable, self-hostable alternative to Calendly with round-robin, routing forms, and built-in video.
Radicale
4.5KRadicale is a self-hosted calendar & contacts replacement for Google Calendar and Google Contacts.
Baïkal
3.1KBaïkal is a PHP-based application that provides lightweight CALDAV and CARDDAV server based on sabre/dav.
EteSync
1.7KEteSync lets you run secure syncing for contacts, calendars, tasks, and notes entirely on your own server.
SabreDAV
1.7KFor calendar & contacts, SabreDAV is a self-hosted solution that provides CARDDAV, CALDAV, and WEBDAV framework and server.
FluidCalendar
937FluidCalendar is a TypeScript-based application that provides intelligent task scheduling and calendar management.
Keeper
770Keeper is a TypeScript-based application that provides calendar syncing and booking tool.
Manage My Damn Life
532Self-hosted calendar & contacts tool that provides (MMDL) is a front end for managing your CALDAV tasks and calendars.
DAViCal
106DAViCal handles calendar storage and sharing as a self-hosted solution.
HiveDAV
HiveDAV handles curlable /busy scheduler with CALDAV integration as a self-hosted solution.
Why Look for Google Calendar Alternatives?
Google Calendar is a scheduling and calendar application with event planning, reminders, and Google Workspace integration.
Self-hosted alternatives give you full data ownership, predictable costs, and zero vendor lock-in. You run the software on your own infrastructure and control everything.
10 Best Open-Source Alternatives to Google Calendar
Cal.com
Effortlessly schedule meetings without email hassles. — 40,581 GitHub stars. Licensed under AGPL-3.0.
Radicale
Simple CalDAV and CardDAV server — 4,474 GitHub stars. Licensed under GPL-3.0.
Baïkal
Calendar and contacts server — 3,099 GitHub stars. Licensed under GPL-3.0.
EteSync
Secure syncing for contacts, calendars, tasks, and notes — 1,734 GitHub stars. Licensed under AGPL-3.0.
SabreDAV
CalDAV, CardDAV, and WebDAV framework — 1,700 GitHub stars. Licensed under MIT.
FluidCalendar
Intelligent task scheduling and calendar management — 936 GitHub stars. Licensed under MIT.
Read full FluidCalendar review
Manage My Damn Life
A self-hosted frontend for managing your CalDAV tasks and calendars — 533 GitHub stars. Licensed under GPL-3.0.
Read full Manage My Damn Life review
Keeper
Calendar syncing and booking tool — 466 GitHub stars. Licensed under AGPL-3.0.
DAViCal
Calendar storage and sharing — 106 GitHub stars. Licensed under LGPL-2.1.
HiveDAV
Curlable free/busy scheduler with CalDAV integration. Licensed under MIT.
Why Self-Host Instead of Google Calendar?
- Data ownership. Your data stays on your server, not on Google Calendar’s infrastructure.
- Predictable costs. Pay a fixed VPS cost instead of growing per-user or per-usage fees.
- No vendor lock-in. Export and migrate your data anytime. You control the database.
- GDPR and compliance. Hosting your own tools simplifies data residency and compliance requirements.
Why teams switch from Google Calendar
- → Data ownership. Your data stays on your server -- not on Google Calendar's infrastructure.
- → Predictable costs. Pay a fixed VPS cost instead of growing per-user or per-usage fees.
- → No vendor lock-in. Export and migrate your data anytime. You control the database.
- → GDPR and compliance. Hosting your own tools simplifies data residency and compliance requirements.
Head-to-Head Comparisons
Both are booking & scheduling tools. Cal.com has 3 unique features, FluidCalendar has 4.
Both are booking & scheduling tools. Cal.com has 4 unique features, Flexprice has 2.
Both are booking & scheduling tools. Cal.com has 3 unique features, Seatsurfing has 2.
Cal.com wins for teams that want scheduling flexibility and data ownership. Calendly is better for individuals and small teams who want a polished, zero-maintenance experience.
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