EU Sovereignty Score
Non-EU vendorScheduling & BookingHeadquarters: US

Cal.com: sovereignty score and 8 European alternatives

Cal.com is a scheduling and booking platform that presents itself as scheduling infrastructure for businesses, products and public services. It offers booking links that can grow into multi-team systems, routing, recurring events, workflows, payments, video conferencing, embedding in your own products and an App Store of integrations. It is delivered as SaaS. A self-hostable version now exists only as a community edition.

In April 2026 Cal.com moved its production code from a public to a private repository, so the software is no longer open source. The public repository calcom/cal.diy now holds the community version, Cal.diy, under the MIT licence, without commercial features such as organisations and teams, routing forms, workflows and SAML/SSO. The company says it has no physical headquarters and works fully distributed. Its separate EU-hosted service, Cal.eu, closes on 1 November 2026; for the international platform, Cal.com does not state a hosting region.

See the 8 European alternatives ↓Assess your stack with Cal.com pre-selected
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Sovereignty score
37 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-210
    Headquartered in the US: CLOUD Act and FISA 702
  • Data residency SOV-3100
    EU-only hosting
  • Cryptographic key sovereignty SOV-320
    Key management with a non-European vendor
  • Freedom from lock-in SOV-640
    Closed source: switching requires data migration
  • Source & runtime sovereignty SOV-4 · SOV-615
    Closed source, runtime with the vendor

SOV codes: the matching objective in the European Commission's Cloud Sovereignty Framework. Official source

How the score is calculated

Facts and evidence

Last checked October 1, 2026
Headquarters
US (US)Verified by hand
EU adequacy decision
Only for companies individually certified under the EU-US Data Privacy FrameworkVerified by hand
Sovereignty model
Vendor-hosted (non-EU)Verified by hand
Data hosting
EUVerified by hand
Open-source
NoVerified by hand
GDPR-compliant
YesVendor-stated
Hosting signal
CLOUDFLARENET - Cloudflare, Inc., US (US)Technically measured
Category
Scheduling & Booking
Type
Product
Website
cal.com ↗

The hosting signal shows the network that serves the vendor's website, often a CDN, and not necessarily where the service or your data is hosted. How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Cal.com

The European alternatives to Cal.com come from our knowledge base of over 6,800 vendors. We only list vendors headquartered in the EU or the EEA; fully European-owned vendors rank before vendors with a foreign owner. For each alternative you see the country, the open-source status and a short description.

Score per alternative: 0 = high exposure, 100 = sovereign

39 European Scheduling & Booking vendors are in the catalogue. View the whole category · Submit an alternative · View category on the map

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Why digital sovereignty matters with Cal.com

Cal.com is headquartered in the United States. US vendors fall under the CLOUD Act and FISA 702: US authorities can compel access to data, even when that data sits in a European data centre. That is the core of the jurisdictional exposure in our model.

Data is hosted exclusively in the EU, so Cal.com scores best on data residency.

Cal.com is closed source and hosted by the vendor. The encryption keys and the runtime sit with the vendor and switching requires data migration. Ask about bring-your-own-key, export options and open standards.

What this means for your organisation depends on your whole stack and context. The free assessment weighs Cal.com together with your other vendors and gives a total score, a heatmap and the main risk drivers.

Frequently asked questions

What is the best European alternative to Cal.com?

It depends on your use case. Strong EU alternatives to Cal.com include Easy!Appointments, Doodle and Shore. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Cal.com?

Yes. Open-source EU alternatives to Cal.com include Easy!Appointments and Pretix. These keep your data fully under your own control and let you self-host if you want to.

Is Cal.com GDPR-compliant and where is the data hosted?

Cal.com is headquartered in US and hosts data in EU. The vendor states it is GDPR-compliant, but the data falls under non-EU jurisdiction. For full EU data residency the EU alternatives on this page usually offer more certainty.

Details and sources

Verified by handHeadquarters, owner, hosting locations and licence have been checked by us against public sources. Free of charge and for every vendor, not a paid label. Nothing in this knowledge base is taken over automatically. Last checked on October 1, 2026.

Sources

Public sources used in the latest check of this record.

Compliance evidence

The links below point to the vendor's own public documents. We only record what we found: a missing link means "not found publicly", not "not compliant".

No public compliance evidence has been recorded for this vendor yet. Do you know its DPA or subprocessor list? Something wrong? Suggest a correction

Digital sovereignty in Scheduling & Booking

Scheduling & Booking: Appointment scheduling, online booking systems and calendar management. In this category the choice of vendor determines who has legal access to your data, where that data lives and how easily you can switch later.

Also in this category

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8 European alternatives to Cal.com — GDPR-compliant & EU-hosted · EU Sovereignty Score