Self-hosting guide

Best self-hosted scheduling software (2027)

Seven open-source tools you can run on your own server, side by side.

Tymeslot
Cal.diy
Easy!Appointments
Rallly
Nextcloud Calendar
Thunderbird Appointment
LibreBooking

Luka Breitig

Updated 2 November 2026

The short answer

Which one should you run?

Tymeslot

You want booking pages with two-way calendar sync and video rooms, with every feature free to self-host.

See the details

Cal.diy

You want Cal.com's integration catalogue for personal use, and can run a Next.js stack.

See the details

Easy!Appointments

You book customers into services with several staff members, on inexpensive PHP hosting.

See the details

Rallly

You need a group to agree on a date, not a booking page.

See the details

Nextcloud Calendar

You already run Nextcloud and need a basic appointment page.

See the details

Thunderbird Appointment

You want a minimal personal booking page with Google or CalDAV and Zoom.

See the details

LibreBooking

You book rooms and equipment rather than people's time.

See the details

Before you choose

A booking tool is not a calendar server

The booking tool publishes your free time. A calendar behind it stores the events and says when you're busy. To keep both on your own hardware, pair the tool with a CalDAV server, and make sure it syncs both ways.

Your guests

Pick a time on your page

Booking tool

Tymeslot, Cal.diy, Easy!Appointments…

Calendar server

Nextcloud, Radicale, Baïkal, or Google and Outlook

How to connect Tymeslot to Nextcloud

Side by side

Self-hosted scheduling tools compared

Facts checked on 2 November 2026 against each project's own site, repository and documentation.

Yes
Partly
No
Not documented

Tool	Booking page	Google & Outlook	CalDAV	Video rooms	Payments	Embed	Free for many users	Team scheduling	Group polls
Tymeslot AGPL-3.0	Booking page: Yes	Google & Outlook: Yes	CalDAV: Yes	Video rooms: Yes	Payments: Yes Stripe	Embed: Yes	Free for many users: Yes	Team scheduling: No	Group polls: Yes
Cal.diy MIT	Booking page: Yes	Google & Outlook: Yes	CalDAV: Yes	Video rooms: Yes	Payments: Yes	Embed: Yes	Free for many users: Partly Personal use only	Team scheduling: No Removed	Group polls: No
Easy!Appointments GPL-3.0	Booking page: Yes	Google & Outlook: Partly Google only	CalDAV: Yes	Video rooms: Partly Meet links	Payments: No	Embed: Partly CMS plugins	Free for many users: Yes	Team scheduling: Yes Providers	Group polls: No
Rallly AGPL-3.0	Booking page: No	Google & Outlook: Not documented	CalDAV: Not documented	Video rooms: Yes	Payments: No	Embed: Not documented	Free for many users: Partly Paid licence	Team scheduling: No	Group polls: Yes
Nextcloud Calendar AGPL-3.0	Booking page: Yes	Google & Outlook: Partly ICS only	CalDAV: Yes Built in	Video rooms: Partly Talk only	Payments: No	Embed: Not documented	Free for many users: Yes	Team scheduling: No	Group polls: No
Thunderbird Appointment MPL-2.0	Booking page: Yes	Google & Outlook: Partly Google only	CalDAV: Yes	Video rooms: Partly Zoom only	Payments: No	Embed: Not documented	Free for many users: Yes	Team scheduling: No	Group polls: No
LibreBooking GPL-3.0	Booking page: Partly Resources	Google & Outlook: Partly ICS export	CalDAV: No	Video rooms: No	Payments: Partly Credits	Embed: Yes	Free for many users: Yes	Team scheduling: Partly Roles and quotas	Group polls: No

Tool by tool

Where each one shines, and where it falls short

Tymeslot

Individuals and small businesses who want polished booking pages, two-way calendar sync and video rooms on their own server.

AGPL-3.0
Elixir
Docker
Cloudron
Railway

The complete product in every install: no licence key, no paid tier, no features held back.
Booking pages, the dashboard and every email in nine languages, with four booking page themes.
No team scheduling yet: no round-robin or collective events.
A younger project with a smaller community than Cal.com's.

How self-hosting Tymeslot works

Sources, checked on 2 November 2026: Tymeslot on GitHub · Tymeslot in the Cloudron App Store

Cal.diy

Developers who want the Cal.com codebase for personal use and are comfortable running a Next.js monorepo.

MIT
Next.js
Docker Compose

Read the full comparison with Tymeslot

The largest integration catalogue of any open-source scheduler.
A very large community: the repository has close to 50,000 GitHub stars.
Cal.com itself went closed source in April 2026; Cal.diy is the community edition it left behind.
No tagged release since the fork: the last versioned release is Cal.com v6.2.0 from March 2026.

Sources, checked on 2 November 2026: Cal.com is going closed source · The Cal.diy repository · Cal.diy app store

Easy!Appointments

Salons, clinics and practices that book customers into services with several staff members.

GPL-3.0
PHP
Docker
Cloudron
YunoHost
Any PHP host

Built around services and staff, which suits customer-facing businesses.
Runs on inexpensive shared PHP hosting.
No Outlook sync and no built-in online payments.
Video is limited to Google Meet links.

Sources, checked on 2 November 2026: Easy!Appointments website · Easy!Appointments 1.6.1 release notes

Rallly

Finding a date that suits a whole group, Doodle-style, rather than publishing a booking page.

AGPL-3.0
Next.js
Docker Compose
Cloudron
YunoHost

The most polished open-source group poll.
Participants vote without creating an account.
Not a booking page: guests can't pick a slot from your availability.
Self-hosting for more than one user needs a paid licence.

Sources, checked on 2 November 2026: Rallly self-hosting licences · Rallly video conferencing setup

Nextcloud Calendar

People who already run Nextcloud and need a simple appointment page.

AGPL-3.0
PHP
Inside Nextcloud
Cloudron
YunoHost

Nothing extra to run if you already have Nextcloud.
Buffers, minimum notice and a daily booking limit.
Guests have to contact the organiser to cancel.
No payments, and Google or Outlook calendars only through ICS subscriptions.

Sources, checked on 2 November 2026: Nextcloud Calendar user manual · Nextcloud Calendar on GitHub

Thunderbird Appointment

Individuals who want a minimal personal booking page from the team behind Thunderbird.

MPL-2.0
Python
Docker Compose

Backed by MZLA, the company behind Thunderbird, and the code behind its hosted service.
Active development with regular releases.
Thin documentation for running it yourself.
No Outlook sync, and Zoom is the only video integration.

Sources, checked on 2 November 2026: Thunderbird Appointment on GitHub

LibreBooking

Booking shared resources such as rooms, desks and equipment, rather than people's time.

GPL-3.0
PHP
Docker
YunoHost

Built for resources, with quotas, approval rules and waiting lists.
A long-lived codebase: it continues Booked Scheduler as open source.
Run 7.1.0 or later: earlier versions let an attacker sign in as another user, and security fixes are not backported.
No calendar sync and no video integration.

Sources, checked on 2 November 2026: LibreBooking on GitHub · LibreBooking administration guide

The fine print

What self-hosting really takes

The licence is free; running it is not quite. Whichever tool you pick, budget for these four.

A server

A small VPS or a home server with a domain and HTTPS. A booking page has to be reachable from the internet, so a laptop that sleeps won't do.

Updates

Anything facing the internet needs security releases applied promptly. Cloudron and YunoHost can apply them for you.

Email delivery

Confirmations and reminders need a proper SMTP service, or they land in spam. Setting up email for Tymeslot

Backups

Your bookings live in your database. Back it up, and try a restore before you need one.

If that is more than you want to look after, the managed Tymeslot at tymeslot.app runs the same open-source code, with a free plan. See the plans

FAQ

Common questions about self-hosted scheduling

Is there a free, self-hosted alternative to Calendly?

Yes. Tymeslot (AGPLv3), Cal.diy (MIT, for personal use), Easy!Appointments (GPL-3.0) and Thunderbird Appointment (MPL-2.0) all give you a public booking page on your own server with no licence fee. They differ in calendar sync, video and how much setup they need; the table above compares them.

Is Cal.com still open source?

Not since April 2026. Cal.com moved its production code to a private repository, and the public repository became Cal.diy: an MIT-licensed community edition without teams, workflows or SSO, which the vendor recommends for personal, non-production use.

Can I use a self-hosted scheduler with Nextcloud?

Yes, in two ways. Nextcloud Calendar has a basic appointments feature built in. Or you can connect a dedicated booking tool to Nextcloud over CalDAV: Tymeslot reads your busy times from Nextcloud, writes new bookings back to it, and can create a Nextcloud Talk room for each meeting.

Which self-hosted scheduling tools work with Jitsi or MiroTalk?

Tymeslot creates rooms on both Jitsi and MiroTalk, as well as Google Meet, Teams, Zoom, kMeet and Nextcloud Talk. Cal.diy's app store includes Jitsi. None of the other tools in this guide integrates with either.

What do I need to run a self-hosted scheduling tool?

A small server or VPS with a domain and HTTPS, an SMTP service so confirmation emails reach inboxes, and regular database backups. Platforms such as Cloudron and YunoHost take care of updates, certificates and backups for you.

How often is this guide updated?

We recheck every fact against each project's own site, repository and documentation at least once a year, and whenever one of these projects ships a major change. The date at the top shows the last update, and the changelog at the bottom lists what changed.

How we compared, and what changed

Tymeslot is our product, so read this guide with that in mind. We included every actively maintained, open-source tool that lets people book time or agree on a date, and left out calendar interface libraries, desk-only booking systems and projects without a release in the last year.

Every fact comes from the project's own website, repository or documentation, and links to it. Where something isn't documented, we say so rather than guess. We recheck the whole guide at least once a year, and whenever one of these projects ships a major change.

2 November 2026 : First published, covering seven tools.

From the blog

All posts

product open-source

Why I built Tymeslot

I put out the first version of Tymeslot two days ago. I built it because the scheduling tools I tried were either dated or too heavy to run myself.

Luka Breitig 4 January 2026 · 3 min read

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