📊 Full opportunity report: AI Sovereignty Certification Limitations And The 24% Rule Perspective on ThorstenMeyerAI.com — validation score, market gap, and execution plan.
TL;DR
European AI sovereignty standards, notably SecNumCloud, include a unique ownership rule capping foreign control at 24%. This limits US cloud providers’ eligibility, shaping the future of AI and data sovereignty in Europe.
European cybersecurity standards for AI and cloud services now include a specific ownership control cap of 24%, which significantly restricts foreign control over providers seeking sovereignty certifications like SecNumCloud. This development impacts major US cloud vendors aiming to operate within the European legal framework, emphasizing ownership and jurisdictional sovereignty.
SecNumCloud, created by France’s ANSSI in 2016 and now at version 3.2, is a qualification that certifies compliance with technical, organizational, operational, and legal requirements. Unlike traditional certifications, it explicitly tests legal sovereignty by requiring providers to demonstrate EU-only data storage, EU domicile, and immunity from non-EU extraterritorial laws. The key criterion is the ownership cap: foreign-controlled companies cannot hold more than 24% of voting rights individually, or 39% collectively.
As of 2026, approximately nine to ten providers, including OVHcloud and Scaleway, hold an active SecNumCloud qualification. The rule effectively bars US hyperscalers like AWS from obtaining this certification unless they restructure ownership control, which some are doing through joint ventures with controlled entities.
The 24% rule: why most “sovereign cloud” certifications don’t test sovereignty
ISO 27001. SOC 2. BSI C5. Gaia-X. Every badge real, audited, correctly displayed — and not one answers the question that decides the deal: can a foreign government compel your data? Exactly one European framework tests that. It does it with a number.
C5 does cover place of jurisdiction, data location & disclosure obligations. It requires you to declare which law reaches you. C5 tells you the gun is in the room.
Requires that no non-EU law can reach you at all — enforced by the ownership cap. SecNumCloud requires there be no gun. That’s the whole difference.
The proposed Cloud and AI Development Act (COM(2026) 502) would set four Union assurance levels for public procurement. Its own recitals concede the point: Cybersecurity Act certification “is not suited for addressing sovereignty concerns.” National labels won’t be banned — but a SecNumCloud provider would still need separate Article 17 recognition. If it passes, the badge on the vendor’s website stops mattering and the assurance level starts. Meanwhile ANSSI + BSI have jointly committed to common criteria specifying where failure is disqualifying.
Microsoft showed the gap better than any critic: May 2025 — encryption makes access “technically impossible.” One month later — cannot guarantee immunity from US authorities. Thirty days between the marketing and the law. SecNumCloud doesn’t ban American technology — it forces a change of control over it (hence S3NS = Thales+Google, Bleu = Capgemini+Orange on Azure). Is it also protectionism? Partly, yes — and that critique is exactly why EUCS High+ died. Both things are true. Don’t ask if a provider is “sovereign” — the word has been marketed into meaninglessness. Ask the arithmetic: who owns you, and what law reaches you? Then check whether the answer is above or below 24% — including for the European champions nobody has asked.
Implications of the 24% Control Limit for Cloud Providers
This ownership rule directly affects the access of US-based cloud giants to the European market for sensitive data hosting. It underscores the shift towards legal sovereignty as a core component of European cloud security, potentially reshaping how international providers operate in Europe. The rule also emphasizes the importance of ownership structures over mere technical compliance, impacting global cloud provider strategies and investments.
European cloud sovereignty certification
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Background on European Cloud Sovereignty Frameworks
European governments and regulators have increasingly prioritized data sovereignty and security standards in recent years. The creation of frameworks like SecNumCloud by France’s ANSSI and the German BSI C5 standard reflects efforts to ensure legal control over data and cloud services. While certifications like ISO 27001 and SOC 2 focus on security practices, SecNumCloud and C5 introduce legal and jurisdictional considerations into the certification process. The 24% ownership cap is a novel approach, explicitly quantifying control and sovereignty.
Historically, US cloud providers have relied on certifications to demonstrate security, but these do not address jurisdictional sovereignty. The European approach now seeks to limit foreign influence through ownership restrictions, a move driven by geopolitical and legal considerations.
“SecNumCloud is designed to guarantee legal sovereignty and data control within the EU, and the ownership cap is a critical component of that.”
— ANSSI spokesperson
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Unresolved Questions About Implementation and Impact
It remains unclear how many foreign-controlled providers will successfully restructure ownership to meet the 24% cap, and how this will influence the overall market share of US cloud giants in Europe. Additionally, the long-term effect of these sovereignty measures on innovation and competition is still developing, with some providers exploring joint ventures or legal restructuring to comply.EU data sovereignty certification
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Next Steps in European Cloud Sovereignty Policy
Expect increased adoption of ownership restructuring strategies by US cloud providers seeking to qualify under SecNumCloud. Regulatory agencies may refine or expand the 24% rule, and more providers are likely to pursue joint ventures or local control arrangements. Monitoring how the market responds and how compliance efforts evolve will be crucial over the coming months and years.
ownership control compliance software
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Key Questions
What is the significance of the 24% ownership control rule?
The 24% rule explicitly limits foreign control over providers seeking European sovereignty certification, effectively barring US giants unless they restructure ownership. It emphasizes legal sovereignty over technical security standards.
How does SecNumCloud differ from other certifications?
SecNumCloud is a qualification that tests legal sovereignty, requiring EU domicile, data storage, and immunity from non-EU laws. It includes an ownership control test, unlike standard security certifications like ISO 27001.
Will US cloud providers be able to qualify under SecNumCloud?
Many US providers are exploring joint ventures or restructuring to limit foreign ownership to under 24%. Success depends on their ability to reorganize ownership structures accordingly.
What impact will these rules have on the European cloud market?
They could restrict US providers’ access to certain sensitive data hosting, encouraging local or European-controlled providers and possibly reducing US market share in strategic sectors.
Are these sovereignty standards legally binding?
Yes, especially for providers hosting sensitive public-sector data in France and potentially other EU countries, as compliance is mandated by national regulations and directives like NIS2.
Source: ThorstenMeyerAI.com
