EU Sovereignty Score
EU sovereignTelephony & VoIPHeadquarters: CH

Salt: sovereignty score and 8 European alternatives

Salt Mobile SA is a Swiss telecommunications operator with its seat in the canton of Vaud. Private customers can take mobile subscriptions, home internet, TV and fixed telephony. For companies, Salt offers business packages with fixed telephony and a solution called Corporate Voice. Services are sold online and through shops and delivered as network services rather than as software that the customer hosts itself.

Since its 2015 acquisition, Salt has been held through NJJ Holding, a French holding company, which places a foreign owner above this Swiss operator. The website does not state where customer data is stored. Switzerland is outside the EU, so a European organisation should check in the contract where data is stored and which company is the contracting party, rather than assume hosting in the EU or in Switzerland.

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Sovereignty score
67 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-2100
    Headquartered in Switzerland: Swiss law, recognised by the EU as adequate
  • Data residency SOV-380
    Hosting in Switzerland only (recognised by the EU as adequate)
  • Cryptographic key sovereignty SOV-360
    Key management with a European vendor
  • Freedom from lock-in SOV-640
    Closed source: switching requires data migration
  • Source & runtime sovereignty SOV-4 · SOV-655
    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 11, 2026
Headquarters
CH (EU)Verified by hand
Ultimate parent company
FRVerified by hand
Sovereignty model
Vendor-hosted (EU)Verified by hand
Data hosting
CHVerified by hand
Open-source
NoVerified by hand
GDPR-compliant
NoVendor-stated
Category
Telephony & VoIP
Type
Product
Website
salt.ch ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Salt

The European alternatives to Salt 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

66 European Telephony & VoIP 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 Salt

Salt 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. The ultimate owner is based in FR, also within Europe.

Salt 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.

Salt 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 Salt 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 Salt?

It depends on your use case. Strong EU alternatives to Salt include A1 Telekom Austria, Adversus and Auerswald. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Salt?

Our list of EU alternatives to Salt is mostly commercial options. Browse the category on the map for open-source choices.

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

Salt is headquartered in CH (EFTA) and hosts data in CH. That makes Salt 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 11, 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 Telephony & VoIP

Telephony & VoIP: Business telephony, VoIP platforms, CPaaS and communication APIs. 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.

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8 European alternatives to Salt — GDPR-compliant & EU-hosted · EU Sovereignty Score