OpenDesk booking
OpenDesk from the Centre for Digital Sovereignty (ZenDiS) is the public sector's sovereign answer to US office suites. Kalenda is the matching online appointment booking — same spirit, same stack, same privacy promise.
OpenDesk gives you Open-Xchange for email and calendar, NextCloud for files, Element for chat — all in federally certified German or Swiss data centres. What's missing: an elegant, publicly shareable appointment booking. Kalenda fills exactly this gap. We speak the CalDAV protocol that Open-Xchange exposes natively, without you having to run an additional connector.
First: fetch the CalDAV endpoint from Open-Xchange (Profile → Accounts → copy CalDAV URL). Second: enter the endpoint with service account credentials in PROVIDERS JSON (encrypted in Keeper Secrets Manager). Third: test the booking page — demo mode if not yet productive. Fourth: embed the iFrame in your website, done.
At cloud services ag we run OpenDesk + Kalenda as an integrated stack at the Eastern Switzerland Data Centre (RZO Gais — Tier IV, ISO 27001). If you run your own OpenDesk (e.g. at BWI or an accredited hoster), Kalenda runs alongside without trouble — either self-hosted or as managed SaaS that connects via CalDAV to your instance.
We invoice OpenDesk operation separately on request. Kalenda on top: CHF 790/year On-Premise (if you self-host) or CHF 29/month SaaS (unlimited calendars, CHF 23.20/month on annual). One flat rate for the whole organisation, regardless of how many users have calendars.
Book 30 minutes with Martin — free, no commitment, technically concrete.