Kalenda

Appointment booking,
fully under your control.

Kalenda is an open-source booking system with CalDAV integration. Run it on your own Swiss infrastructure or let us host it for you from our data centre in Gais. No US cloud, no third-party cookies, no lock-in.

Try the demoSee pricing
  • AGPL-3.0
  • CalDAV
  • RZO Gais
  • GDPR + Swiss DPA

Features

Everything included, no compromises.

CalDAV integration

Plugs into OpenDesk, Open-Xchange, Nextcloud, iCloud or any CalDAV-compatible server. No data silos.

iFrame embed

One line of HTML on your existing site. Language, theme and topic delivered via URL parameters.

GDPR + Swiss DPA

Data stays in Switzerland, no US cloud, no Google. Privacy policy ships in both German and English.

Multilingual

DE and EN out of the box, more languages via next-intl. Localisable URLs.

Exclusive slot locking

No race conditions, even on concurrent clicks. Valkey-based distributed locking.

Altcha instead of CAPTCHA

Proof-of-work spam protection without tracking, without Google reCAPTCHA, without cookies.

Pricing

Self-host or let us run it.

On-Premise from CHF 790/year — flat fee, unlimited calendars. Or managed SaaS for CHF 29/month — unlimited calendars included.

On-Premise

CHF 790per instance / year

≈ EUR 865

You operate Kalenda on your own infrastructure. A commercial licence for unlimited calendars per instance.

  • AGPL exception
  • Unlimited calendars
  • Email support
  • Updates included
Request licence
Empfehlung

SaaS

CHF 29per month — unlimited calendars

≈ EUR 31.60

Managed single-tenant deployment in the Eastern Switzerland data centre. Unlimited calendars, 20 % discount on annual billing.

  • Unlimited calendars
  • Single-tenant in RZO Gais
  • 99.9 % SLA
  • 20 % annual discount
Register interest

OEM lump-sum licensing for resellers and product integrators on request.

Trust & transparency

Open source means: no secrets.

Licence
AGPL-3.0
Location
RZO Gais, Appenzell
Compliance
GDPR + Swiss DPA
Source code
github.com/cloud-services-ag/kalenda

Get started

30-second demo, no login.

Click through the booking flow — no signup, no credit card, no CalDAV setup. See what your customers will see.

Open demoContact us

Contact

Let's talk about your appointment booking

Questions about self-hosting, SaaS, CalDAV integration or OEM licensing? Drop us a line — we usually respond within 1–2 business days.

E-mail
kalenda@cloud-services-ag.com
Address
cloud services ag Breitfeldstrasse 8 9015 St. Gallen
Live demo
Open the 30-second demo

Click through the booking flow without a login.