About Kalendarius
Kalendarius is an appointment booking tool for European teams that would rather not send booking data to a US-hosted service. This page says who runs it, where the data is kept, which other companies receive data and how to reach us.
Kalendarius is run by Ugur Akcelik, a sole proprietor in Turin, Italy (VAT IT12938420010). The application and database run on Hetzner servers in Nuremberg and Falkenstein, Germany. Questions go to info@kalendarius.com or through the contact form.
Who runs Kalendarius
Kalendarius is run by Ugur Akcelik, a sole proprietor based in Turin, Italy (VAT IT12938420010). He operates the service under our terms of service and is the data controller named in the privacy policy.
News about the product is posted on LinkedIn.
Why it exists
Healthcare practices, law firms, public administration and HR teams across Europe want online appointment booking. Many of them would rather not send their booking data to a tool hosted in the US, or they have clients who ask where that data is kept.
Kalendarius is built for them: booking links, calendar sync with Google, Microsoft and Zoho, collective and round-robin team links, and email reminders, with the application and database hosted in Germany.
Where the data is hosted
The application and database run on Hetzner servers in Nuremberg and Falkenstein, Germany. Daily database backups are kept on the same infrastructure for 7 days.
Hetzner's data centres hold ISO/IEC 27001 certification. That certificate is Hetzner's; Kalendarius itself holds no certification.
Public booking pages load no advertising or analytics trackers. Sentry error monitoring runs there so we can find and fix bugs.
Sub-processors and other recipients
Hetzner Online GmbH (Germany) hosts the application and database. Register S.p.A. (Register.it, Italy) sends our emails. Sentry (Functional Software, Inc.) stores error reports from the browser and the API in its EU region in Germany for up to 90 days; Sentry is a US company, so access from outside the EU can't be ruled out. Paddle.com Market Ltd (United Kingdom) processes payments as merchant of record.
Google, Microsoft and Zoho receive data only when you connect their calendars or meeting tools, under their own terms. Google Ads and Meta load only on marketing pages after you accept marketing cookies, and never on booking pages. The full details are in our privacy policy.
Data processing agreement
When your organization takes bookings through Kalendarius, you are the controller and we process guest booking data on your behalf under Article 28 GDPR. A Data Processing Agreement (DPA) for the Business and Enterprise plans is in legal review; contact info@kalendarius.com.
How to reach us
Write to info@kalendarius.com or use the contact form. If you'd rather look at the product first, start free on the Personale plan.
Frequently asked questions
Who is behind Kalendarius?
Ugur Akcelik, a sole proprietor in Turin, Italy (VAT IT12938420010). He runs the service and is the data controller named in the privacy policy.
Where is my booking data stored?
On Hetzner servers in Nuremberg and Falkenstein, Germany. If you connect Google, Microsoft or Zoho calendars, those providers also hold the events we write into them, under their own terms.
Can I get a data processing agreement?
A Data Processing Agreement (DPA) for the Business and Enterprise plans is in legal review; contact info@kalendarius.com.
Related guides
Compare scheduling software for GDPR readiness: review hosting, calendar integrations, booking data, DPAs, subprocessors, retention and deletion.
A Calendly alternative hosted in Germany. Team costs €9.90 per organizer a month, and interviewers who only connect a calendar don't pay.
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Personale is free for one organizer, one event type and 15 bookings a month.
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