tymeslot

Scheduling software that stays yours.

Booking pages, calendar sync, video rooms and automated emails — running on your server, under your control.
Built on Elixir/OTP, so it keeps running while you sleep.

Self-host with Docker →  ·  Try the Cloud →  ·  Live demo →  ·  Docs →  ·  Issues →

_{A real booking, start to finish: pick a duration, choose a time, done.  ·  Watch in HD →}

Open source, and staying that way. Calendly is closed SaaS. Cal.com relicensed away from open source in 2026. Tymeslot's source stays public and self-hostable under the GNU AGPLv3 — what you run today, you can keep running tomorrow.

Actively developed. Tymeslot is the engine behind tymeslot.app, our managed cloud — so the code you self-host is the same code we run in production for paying customers. New releases ship regularly; see the releases.

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Quick start

One command. Postgres is bundled, so there is nothing else to install.

docker run --name tymeslot \
  -p 4000:4000 \
  -e SECRET_KEY_BASE="$(openssl rand -base64 64 | tr -d '\n')" \
  -e PHX_HOST=localhost \
  -v tymeslot_data:/app/data \
  -v tymeslot_pg:/var/lib/postgresql/data \
  luka1thb/tymeslot:latest

Open http://localhost:4000 — your scheduling platform is live. The first account you create becomes the admin. For SMTP, TLS, a reverse proxy and external Postgres, see the Docker guide.

Keep tymeslot_pg as a named volume. Swapping it for a host path can fail on Docker Desktop, rootless Docker and SELinux hosts. If you need a specific location, use external Postgres instead.

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Everything you need to take bookings

No add-ons, no per-feature upsells. It all ships in the box.

One place to run your day

Upcoming meetings, quick actions and your whole setup on a single screen. No hunting through menus to change how you take bookings.

Availability that mirrors reality

Working hours, date-specific overrides, holiday blocks, per-meeting buffers, booking windows and minimum notice — set once, and your booking page reflects exactly when you are free.

Embed it anywhere

Inline on a page, a popup, or a floating button. Copy the snippet, paste it on your site. Tokens are signed and domain-locked, so your widget only runs where you put it.

Never double-booked

Every connected calendar is checked the moment someone books. One conflict anywhere blocks the slot everywhere — across Google, Outlook, CalDAV and the rest.

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And there's more under the hood

• Email that delivers — responsive templates, an .ics file on every send, configurable reminders, and signed cancel/reschedule links that need no login.
• Ask the right questions — add custom questions to any meeting type, so you walk into every call already briefed.
• SSO-first auth — email/password, Google, GitHub, plus generic OAuth/OIDC for Keycloak, Authentik, Okta and Azure AD. Disable registration or password login independently.
• Privacy by design — credentials encrypted at rest, no third-party trackers or analytics pixels, rate-limited public endpoints, HMAC-signed webhooks, CSRF and signed tokens throughout.
• Automate everything — meeting_created, meeting_cancelled and meeting_rescheduled webhooks plug straight into n8n, Zapier, Make or your own backend.
• Make it yours — two booking-page themes (Quill and Rhythm) with dark mode and white-label options.
• Speaks your language — English, German, Ukrainian, French and Italian, with Slack/Telegram notifications.
• Get paid to meet — optional paid bookings through Stripe Connect, off by default and fee-free for self-hosters.

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Works with your stack

Calendars — sync availability and write confirmed meetings back, both ways.

Google Calendar	Outlook	Apple iCloud	CalDAV
Nextcloud	Radicale	Zimbra	Baikal
mailbox.org

Video & location — auto-create a meeting room (or set a place) when a booking is confirmed.

Google Meet	Microsoft Teams	Zoom
MiroTalk P2P	In person / phone	Custom link

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Deploy your way

Method	Guide	Notes
Docker	README-Docker.md	Single container, Postgres included — recommended
Cloudron	README-Cloudron.md	One-click install, automatic updates
Railway	Deploy →	One-click cloud, no server to manage
Managed Cloud	tymeslot.app	Zero setup, free plan included

Full configuration reference — SMTP, OAuth, OIDC, reCAPTCHA, external Postgres, SSO-only mode — lives in the Docker guide. The first user to register on a fresh install becomes admin and gets /admin, where runtime settings (registration on/off, password auth, video transcoding) can be toggled without a redeploy. For promoting further admins on each target, see docs/ADMIN.md.

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Meeting payments

Optional. Charge attendees through Stripe at booking time. Off by default — self-hosters opt in by registering their own Stripe platform, and Tymeslot never holds the funds or takes a cut unless you set one.

Set up Stripe Connect

Prerequisites

1. Register a Stripe account for your instance and enable Stripe Connect.
2. Add Tymeslot as a Connect platform — your instance becomes the platform that hosts' Stripe accounts connect to.
3. Create a separate webhook endpoint in the Stripe dashboard for Connect events and copy its signing secret. Point it at https://<your-domain>/webhooks/stripe/connect, set it to listen to events on Connected accounts, and subscribe it to checkout.session.completed, checkout.session.expired, charge.refunded, charge.dispute.created, charge.dispute.closed, and account.updated.

Tymeslot pins its Stripe API calls to version 2025-11-17.clover. Create the webhook endpoint on that API version (or your account default, if newer); endpoints on older versions keep working, as both payload generations are read. Upgrading Tymeslot never rotates or invalidates webhook signing secrets — existing endpoints and secrets stay valid.

Environment variables

Variable	Purpose
STRIPE_SECRET_KEY	Your platform's Stripe secret key (sk_live_… or sk_test_…). Required when MEETING_PAYMENTS_ENABLED=true.
STRIPE_CONNECT_WEBHOOK_SECRET	Signing secret for the Connect webhook endpoint. Required to verify connected-account events.
MEETING_PAYMENTS_ENABLED	Set to true to expose the payments dashboard and the per-event payment toggle. Defaults to false.
MEETING_PAYMENTS_APPLICATION_FEE_BP	Optional platform fee in basis points (100 = 1%). Defaults to 0, so self-hosters never take a cut unless they opt in. Range 0–10000.

Once enabled, hosts connect their own Stripe account from Dashboard → Integrations → Payments, pick a currency, and switch on Require payment for any event type. Direct charges flow into the host's Stripe balance on their existing payout schedule.

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Built on

         

     

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Pricing

Self-hosted — free, forever

The full feature set, every integration, unlimited bookings. Yours under the GNU AGPLv3, with community support. Self-host with Docker →

Managed Cloud — free plan, €9/mo for Pro

Zero maintenance, automatic updates and priority support. Start free; upgrade to Pro when you grow. Try the Cloud → — 7-day Pro trial, no card required.

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Star us & contribute

If Tymeslot is useful to you, star the repo — it's the single biggest thing you can do to help others find it.

PRs and issues are welcome — start with CONTRIBUTING.md. Found a security issue? Please report it via the contact page rather than a public issue.

Tymeslot is better thanks to its contributors — see CONTRIBUTORS.md, with special thanks to @dani for generic OAuth, French localisation and a stream of CalDAV fixes.

Licence

Open source under the GNU AGPLv3 — free to use, self-host, modify and redistribute; if you run a modified version as a network service, share your changes under the same licence.

The licence covers the code. The Tymeslot name and logo are trademarks of Diletta Luna OÜ — forks are welcome, but must travel under their own name. See TRADEMARK.md.

_{Built with Elixir, Phoenix and LiveView · by the Tymeslot team at Diletta Luna OÜ · Tallinn, Estonia}