Magazine
European Cloud
GDPR Compliance

CLOUD Act vs GDPR Compliance: A Guide to Sovereign EU Cloud Storage

04.09.2025

11

Minutes
Christian Kaul
Founder & COO Impossible Cloud
How European businesses can eliminate regulatory risk by choosing a cloud provider that is sovereign by design.

Key Takeaways

  • The US CLOUD Act creates a direct legal conflict with the EU's GDPR, as it can compel US-based companies to provide data stored in the EU to US authorities.
  • Using a US-owned cloud provider, even in an EU data center, does not guarantee GDPR compliance due to the provider's obligations under US law, a risk highlighted by the Schrems II ruling.
  • A 'sovereign-by-design' cloud provider—EU-owned, operated, and governed—is the only way to fully eliminate CLOUD Act exposure and ensure GDPR compliance.

For IT leaders in the UK and across Europe, navigating the complexities of cloud data storage has become a high-stakes challenge. The core of the problem is a direct legal clash: the US CLOUD Act compels US-based tech companies to provide data to US authorities, regardless of where it is stored. This stands in stark opposition to the EU’s General Data Protection Regulation (GDPR), which strictly governs data transfers. The landmark Schrems II ruling further complicated matters by invalidating the EU-US Privacy Shield, highlighting that even US-owned data centers in the EU do not guarantee compliance. This guide deconstructs the CLOUD Act vs GDPR compliance dilemma and presents a clear, actionable strategy for achieving true digital sovereignty.

Deconstruct the Core Conflict: CLOUD Act vs GDPR

The US CLOUD Act of 2018 grants US law enforcement far-reaching authority. It can compel any US-headquartered company to produce data upon request, even if that data resides in a European data center. This creates an unavoidable jurisdictional conflict with the GDPR, which is designed to protect EU citizens' data privacy. Article 48 of the GDPR explicitly states that court orders from third countries are only valid if based on an international agreement, which the CLOUD Act bypasses.

This legal impasse is not theoretical; it carries substantial financial risk for businesses. A single violation of GDPR's data transfer rules can result in fines of up to 4% of a company's global annual turnover. For any company storing sensitive customer or business data, relying on a US-based provider introduces a permanent state of regulatory jeopardy. You can learn more about GDPR-compliant cloud storage and its foundational principles. This fundamental conflict requires a new approach to data residency and control.

Identify Why US-Based Clouds Introduce Unavoidable Risk

Storing data within an EU-based data center is a critical first step, but it is insufficient if the provider is a US company. The CLOUD Act's extraterritorial reach means that the provider's legal obligation is to the US government, creating a backdoor to your EU data. This issue was central to the 2020 'Schrems II' ruling by the Court of Justice of the European Union, which invalidated the Privacy Shield data transfer framework. The court found that US surveillance laws do not provide adequate protection for EU citizens' data.

This creates several layers of risk for European businesses:

  • Forced Data Disclosure: A US provider can be legally compelled to hand over your data, directly violating GDPR principles.
  • Lack of Legal Recourse: EU data subjects lack actionable judicial redress in the US regarding government surveillance.
  • Intellectual Property Exposure: Sensitive corporate data, not just personal data, is subject to access requests.
  • Conflicting Legal Demands: Companies face a dilemma between complying with a US warrant and breaching GDPR, risking penalties on both sides.

Simply put, the provider's country of origin is as important as the data center's location. True data sovereignty is only possible when the entire operational and legal framework is exclusively European, which leads to a more resilient strategy.

Implement a Sovereign-by-Design Storage Strategy

To solve the CLOUD Act vs GDPR compliance puzzle, businesses must adopt a 'sovereign-by-design' approach. This means selecting a cloud storage partner that is not only located in the EU but is also owned, operated, and governed exclusively under EU law. Impossible Cloud is built on this principle, ensuring that US jurisdiction and the CLOUD Act do not apply. Our services operate exclusively in certified European data centers, providing complete legal certainty.

We offer country-level geofencing, allowing you to restrict data storage to specific EU nations to meet even the strictest regulatory requirements. This guarantees your data stays where you put it, under the protection of EU privacy laws. Furthermore, our platform is built with full S3-API compatibility, meaning your existing applications, scripts, and backup tools work without modification. This ensures a seamless migration with zero operational disruption, protecting your past IT investments while securing your future compliance.

Leverage Sovereign Architecture for Resilience and Predictability

A sovereign cloud offers more than just legal compliance; it delivers superior operational resilience and economic predictability. Our architecture provides robust protection against modern threats like ransomware through features like Immutable Storage. Using S3 Object Lock, you can make backups unchangeable for a set period, ensuring a clean recovery copy is always available. This proactive security posture is a core component of a resilient IT strategy.

We also eliminate the unpredictable costs that plague traditional cloud models. Our pricing is transparent, with no egress fees, no API call costs, and no minimum storage duration. This allows for predictable budgeting and protects your margins, a critical advantage for our MSP partners. An enterprise-ready sovereign cloud should deliver on these key promises:

  1. Full S3 Compatibility: Ensure all your existing tools and workflows function without code rewrites, minimizing migration risk.
  2. 'Always-Hot' Architecture: All data is immediately accessible without the delays or surprise fees of complex storage tiers.
  3. Granular IAM Controls: Implement role-driven policies with MFA and support for external identity providers via SAML/OIDC.
  4. Immutable Backups: Utilize Object Lock as a non-negotiable defense against ransomware attacks and data tampering.

This combination of security and cost-effectiveness prepares your organization for future regulatory demands.

Prepare for Upcoming EU Data Regulations: NIS-2 and the Data Act

The EU regulatory landscape continues to evolve, and a sovereign cloud strategy is essential for future-readiness. The EU Data Act, fully applicable from September 2025, mandates greater data portability and makes it easier for customers to switch cloud providers without technical or contractual lock-in. Our model, with its open S3 standard and zero egress fees, is already aligned with this vision of a fair data economy. We provide a real exit path, ensuring you always control your data.

Simultaneously, the NIS-2 Directive imposes stricter cybersecurity risk management and reporting obligations on critical sectors, including data center and cloud providers. NIS-2 emphasizes supply-chain security, requiring you to ensure your providers meet high security standards. By partnering with a European provider like Impossible Cloud, whose operations are built around EU compliance and security, you bake NIS-2 readiness into your infrastructure from day one. Explore our commitment to compliance to see how we meet these standards.

Enable Channel Partners with a Predictable, Compliant Platform

For Managed Service Providers, resellers, and system integrators, the CLOUD Act vs GDPR compliance challenge is also a business opportunity. Offering a truly sovereign backup and archive solution provides a powerful differentiator. Our partner program is built on a foundation of predictability. With zero egress or API fees, you can build BaaS and DRaaS offerings with stable, defensible margins, free from the surprise costs common with hyperscalers. This is a key part of our GDPR value proposition.

Our platform is partner-ready, featuring a multi-tenant management console with robust RBAC and MFA for secure client administration. Automation via a full-featured API and CLI allows for seamless integration into your existing service delivery workflows. Recent distribution agreements with api in Germany and Northamber plc in the UK further expand local access for our partners. This growing ecosystem makes it easier than ever to deliver compliant, high-margin cloud services to your clients. Now is the time to start a conversation about partnership.

FAQ

What is digital sovereignty?

Digital sovereignty is the principle that data is subject to the laws and governance structures of the nation or region where it is located. For the EU, this means keeping data within the EU's legal framework, protected by regulations like GDPR and free from the reach of foreign laws like the US CLOUD Act.

Why is S3 compatibility important for a sovereign cloud?

S3 compatibility is the de facto standard for object storage. It ensures that your existing applications, backup software (like Veeam or NovaBackup), and management scripts can connect to a new cloud storage provider without needing to be rewritten. This dramatically simplifies migration, reduces costs, and eliminates vendor lock-in.

What are egress fees and why do they matter?

Egress fees are charges that cloud providers levy when you move data out of their network. These fees can be unpredictable and high, creating a significant financial barrier to retrieving your own data or switching providers. Impossible Cloud has zero egress fees, ensuring predictable costs and true data portability.

How does Immutable Storage protect against ransomware?

Immutable Storage, or S3 Object Lock, allows you to set a policy that makes data unchangeable and undeletable for a specific period. If a ransomware attack occurs, your immutable backups remain untouched, guaranteeing you have a clean, uncorrupted copy of your data to restore from, rendering the attack ineffective.

Is Impossible Cloud suitable for MSPs?

Yes, Impossible Cloud is designed for MSPs. Our predictable pricing model with no egress or API fees allows for stable margins on backup and archive services. We provide a multi-tenant console, full automation via API/CLI, and are expanding our channel presence through distributors like Northamber plc in the UK.

How does Impossible Cloud align with the EU Data Act?

The EU Data Act, effective from September 2025, aims to prevent vendor lock-in and make it easy for users to switch cloud providers. Impossible Cloud's model—built on the S3 standard with no egress fees—is already aligned with these principles, ensuring customers have full control and portability of their data.