EU Sovereignty Score
Self-hosted / open sourceScheduling & BookingHeadquarters: CH

newdle: sovereignty score and 8 European alternatives

newdle is a web tool that simplifies finding the best time for a meeting or event. Organisers propose several possible slots and share a link; participants mark the times that suit them, without needing an account. The tool can fetch free/busy information directly from Exchange servers, so everyone sees at a glance who is available when. According to the project, support for further calendar providers and a link for creating the final event in Indico are in development. newdle is server software that you run yourself.

It is developed by the Indico team at CERN, the European intergovernmental organisation for nuclear research near Geneva, as part of the MALT project. CERN holds the copyright, and the code is available under the MIT licence. Because newdle can be installed on your own infrastructure, calendar data and participants' answers stay with your own organisation. There is no vendor cloud that processes the data. The project is listed in openCode, the German public sector's software directory.

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Sovereignty score
94 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-2100
    Headquartered in Switzerland: Swiss law, recognised by the EU as adequate
  • Data residency SOV-3100
    Hosting in Switzerland only (recognised by the EU as adequate)
  • Cryptographic key sovereignty SOV-390
    Self-hostable: encryption keys under your own control
  • Freedom from lock-in SOV-680
    Open source: low switching costs
  • Source & runtime sovereignty SOV-4 · SOV-6100
    Source code auditable, forkable and self-hostable

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 14, 2026
Headquarters
CH (EU)Verified by hand
Sovereignty model
Open-source, distributedVerified by hand
Data hosting
CHVerified by hand
Open-source
YesVerified by hand
GDPR-compliant
YesVendor-stated
Category
Scheduling & Booking
Type
Product
Website
newdle.cern.ch ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to newdle

The European alternatives to newdle come from our knowledge base of over 9,300 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

91 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 newdle

newdle is headquartered in Switzerland and falls under Swiss law, including the revised Swiss data protection act. Switzerland is not an EU member, but the European Commission recognises its level of data protection as adequate. Its Swiss headquarters does not by itself bring it under US legislation such as the CLOUD Act.

newdle hosts data in Switzerland only. Switzerland is not part of the EU or the EEA, so the GDPR does not apply there directly; the European Commission does recognise Swiss data protection as adequate, so personal data can go there without extra safeguards. Our model therefore scores it between EU hosting and hosting outside Europe. If you require strictly EU hosting, take this into account.

newdle is open source. You can audit the source code, self-host the software and keep the encryption keys under your own control. Switching is easier because data and software are not tied to a single party.

What this means for your organisation depends on your whole stack and context. The free assessment weighs newdle 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 newdle?

It depends on your use case. Strong EU alternatives to newdle include agenda.ch, Agendize and Aïkku PLANN. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to newdle?

Yes. Open-source EU alternatives to newdle include Aïkku PLANN and Baïkal. These keep your data fully under your own control and let you self-host if you want to.

Is newdle GDPR-compliant and where is the data hosted?

newdle is headquartered in CH (EFTA) and hosts data in CH. It is also open-source, so you can self-host it. That makes newdle an EU-sovereign choice in its own right; the EU alternatives on this page are comparable European tools.

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 14, 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

In the changelog

Earlier changes to this page, as listed in the public changelog.

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 newdle — GDPR-compliant & EU-hosted · EU Sovereignty Score