// Blog / Security
04.04.2025

A rare combination: Virtual data room with BSI C5 and SOC 2 attestations

BSI C5 SOC 2 Certifications Data Room

netfiles offers verified security – made in Germany

Whether for due diligence processes, confidential project work or the exchange of security-sensitive documents – anyone opting for a SaaS solution needs a high level of trust in technology, security and compliance. netfiles Data Room meets these expectations with company headquarters and data hosting in Germany, GDPR compliance and multiple independent security attestations. What sets it apart: netfiles has been successfully audited for both BSI C5 and SOC 2, making it the ideal solution for companies unwilling to compromise on data security.

BSI C5: Security in line with the German BSI
The Cloud Computing Compliance Criteria Catalogue (C5) was developed by the German Federal Office for Information Security (BSI) and defines extensive minimum requirements for cloud services – particularly for the German market and the public sector. Unlike traditional certifications, C5 is an attestation based on the ISAE 3000 standard, issued by independent auditing firms. The strict baseline controls defined in C5 provide customers with a risk management framework and offer valuable guidance when selecting cloud service providers.

SOC 2: International security standard for cloud services
SOC 2 (System and Organization Controls) is an internationally recognized auditing standard by the American Institute of Certified Public Accountants (AICPA). It evaluates five Trust Services Criteria: security, availability, processing integrity, confidentiality and privacy. The SOC 2 Type II attestation confirms that netfiles has implemented effective, auditable security controls over a defined period – an essential assurance for companies operating across international markets.

Attestation vs. certification – what’s the difference?
BSI C5 and SOC 2 are attestations, not formal certifications. While certifications such as ISO 27001 confirm adherence to standards through accredited certification bodies, attestations are independent audit reports focused on how well specific processes and controls are implemented in practice. They offer deeper insights into actual security provisions – especially for organizations with high compliance requirements.

You can find an overview of our ISO certifications here.

A rare combination in today’s marketplace
The combination of BSI C5 and SOC 2 attestations is still uncommon – especially among virtual data room and cloud storage solution providers. Many focus on either European or international standards. netfiles deliberately covers both: We meet stringent German and EU compliance expectations while also fulfilling international auditing standards. This dual attestation is a clear differentiator – and a strong argument for companies that expect the most from their service providers.

When data transfer frameworks are at risk, secure alternatives matter
Ongoing concerns around the EU-US Data Privacy Framework (DPF) show how fragile transatlantic data protection arrangements remain. If the DPF – like its predecessors, Safe Harbor and Privacy Shield – were to be overturned again by the European Court of Justice, data transfers to the U.S. could be severely restricted. In such a scenario, netfiles – headquartered and hosting data solely in Germany to GDPR and independently attested standards – offers a future-proof alternative for organizations that prioritize control, compliance and data sovereignty.

Further reading: Data security and GDPR compliance when sharing data with clients

Who benefits most?
A data room with both BSI C5 and SOC 2 attestations is particularly valuable for:

  • Regulated industries (e.g. finance, healthcare)

  • Public sector organizations and service providers

  • Law firms and tax consultants with GDPR obligations

  • International enterprises with complex compliance requirements

netfiles data rooms offer these sectors not only maximum security, but also transparency, full auditability and flexible scalability.

Also relevant for regulated financial organizations: DORA compliance and data rooms

What does this mean for our customers?
Choosing a provider with BSI C5 and SOC 2 attestations gives organizations a significant advantage: They benefit from a solution that has already been verified by independent auditors for security, transparency, and internal control frameworks – according to both European and international standards. This simplifies audits, reduces the security assessment workload, and strengthens trust among clients, partners, and regulatory bodies. In short, it saves time, enhances legal certainty, and brings clarity to security-critical data processes.

Conclusion: Security – not just a promise
With its headquarters and data hosting exclusively in Germany, BSI C5 and SOC 2 attestations and multiple ISO certifications, netfiles delivers the highest standards of security, data sovereignty, and regulatory compliance.

Would you like to learn more about how these standards support your compliance goals? Schedule a brief introduction today or try netfiles free for 14 days.