EU sovereignCloud IaaSHeadquarters: FR

S3NS: sovereignty score and 8 European alternatives

S3NS is a French company that offers PREMI3NS, a public cloud built on Google Cloud technology. The service includes compute, containers, databases, storage, analytics and identity services from the Google Cloud portfolio. It is delivered as a cloud operated by S3NS, with qualification still in progress for some services. S3NS also offers CRYPT3NS, aimed at helping customers meet sovereignty, security and compliance requirements.

S3NS describes itself as a company under French law controlled by Thales, and its website lists both Thales and Google Cloud as parent companies. PREMI3NS is qualified SecNumCloud 3.2 by the French cybersecurity agency ANSSI. According to S3NS, data is located in France, in a region of three independent data centres. Because the technology is based on Google Cloud and Google Cloud is named as a parent company, a European organisation should assess the legal and technical separation from Google. The platform is proprietary and not open source.

See the 8 European alternatives ↓Assess your stack with S3NS pre-selected

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Sovereignty score

71 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-2100
Headquartered in the EU: European law applies
Data residency SOV-3100
EU-only hosting
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 September 8, 2026

Headquarters	FR (EU)Verified by hand
Sovereignty model	Vendor-hosted (EU)Verified by hand
Data hosting	EUVerified by hand
Open-source	NoVerified by hand
GDPR-compliant	YesVendor-stated
Compliance documents	1 published, see belowVendor-stated
Hosting signal	GOOGLE-CLOUD-PLATFORM - Google LLC, US (US)Technically measured
Category	Cloud IaaS
Type	Product
Website	s3ns.io ↗

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 S3NS

The European alternatives to S3NS 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

84 European Cloud IaaS 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 S3NS

S3NS is headquartered in FR and therefore falls under European law: the GDPR, NIS2 and the Data Act. No foreign legislation can compel access to your data.

Data is hosted exclusively in the EU, so S3NS scores best on data residency.

S3NS 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 S3NS 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 S3NS?

It depends on your use case. Strong EU alternatives to S3NS include 1984 Hosting, acens and Aiven. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to S3NS?

Our list of EU alternatives to S3NS is mostly commercial options. Browse the category on the map for open-source choices.

Is S3NS GDPR-compliant and where is the data hosted?

S3NS is headquartered in FR (EU) and hosts data in EU. That makes S3NS 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 September 8, 2026.

Sources

This record was checked via the vendor's website and legal notice when it was added on September 8, 2026. Source links have been recorded per record since 20 September 2026.

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".

Data Processing Agreement (DPA): s3ns.io/en/offers/premi3ns-trusted-cloud

Provenance of the links above:Vendor-stated

Links checked on September 21, 2026.

Digital sovereignty in Cloud IaaS

Cloud IaaS: Infrastructure as a Service — virtual machines, storage, networking. 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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