A SharePoint alternative is any document collaboration and file-sharing platform that replicates SharePoint’s core functions, such as shared libraries, version control and access control, without depending on Microsoft’s infrastructure or legal jurisdiction. For many European organizations, the search for such an alternative is no longer driven by price or features alone: it is driven by regulatory exposure.
Why SharePoint and OneDrive Create a Jurisdiction Problem
SharePoint and OneDrive are Microsoft services, and Microsoft is a US-incorporated company. That single fact has significant legal consequences for any organization processing sensitive or regulated data.
The US Clarifying Lawful Overseas Use of Data Act, commonly known as the CLOUD Act, enacted in 2018, grants US federal authorities the power to compel US cloud providers to produce data stored anywhere in the world. Microsoft, Google and Amazon are all subject to this law.
The European Data Protection Board (EDPB) addressed this directly in its Recommendations 01/2020 on supplementary transfer tools, stating: “Public authorities and companies that process sensitive data must ensure that cloud services cannot be accessed by third-country authorities without an appropriate legal basis under EU law.”
For IT managers and DPOs operating under GDPR, NIS2 or sector-specific frameworks such as the Dutch BIO (Baseline Informatiebeveiliging Overheid), this creates a structural compliance tension that cannot be resolved by contract alone.
How Nextcloud Files Compares to OneDrive and SharePoint
Nextcloud Files is an open-source file-sync-and-share platform that covers the primary use cases of both OneDrive and SharePoint: document storage, co-editing, version history, shared team folders and access control.
| Feature | SharePoint / OneDrive | Nextcloud Files |
|---|---|---|
| Hosting jurisdiction | US-governed (CLOUD Act applies) | Operator-defined: EU, Swiss or on-premise |
| Access control granularity | Role-based, integrated with Azure AD | Role-based, password-protected links, expiring shares |
| End-to-end encryption | Not available for stored files | Available via client-side E2EE module |
| Source code auditability | Closed source | Fully open source (AGPL) |
| Power Platform / SharePoint intranet | Native integration | Not replicated; third-party tools required |
Nextcloud Files does not replicate every SharePoint capability. Organizations with deep dependencies on Microsoft Power Automate, Power Apps or SharePoint-based intranet publishing should inventory those workflows before committing to a migration. For the majority of teams whose SharePoint use is essentially shared file storage and document review, the functional gap is small.
Nextcloud GmbH reports that more than 400,000 organizations worldwide use the platform, including multiple European government bodies (Nextcloud GmbH, 2023). The German federal government and several European ministries have publicly documented their use of Nextcloud as part of sovereign workspace initiatives.
Keeping File Shares Out of Foreign Jurisdictions
Three structural measures together create genuine data sovereignty for file sharing. None of them works in isolation.
1. Choose a non-US provider
The provider operating your file-sharing infrastructure must not be a US legal entity and must have no US parent company. A European or Swiss subsidiary of a US corporation does not satisfy this requirement: the CLOUD Act obligation flows through the corporate group.
2. Enforce encryption with operator-blind key management
Even on sovereign infrastructure, the operator’s ability to access plaintext files is a risk. Client-side end-to-end encryption, where keys are held exclusively by the client organization, means the infrastructure operator cannot produce readable data in response to any legal demand. Post-quantum encryption algorithms, such as those standardized by NIST in 2024 (FIPS 203, 204 and 205), extend this protection against future quantum computing attacks, which is relevant for files with long confidentiality horizons.
3. Apply strict access control policies
Sovereign hosting combined with encryption is undermined by permissive sharing practices. Access control policies should enforce least-privilege by default: time-limited share links, mandatory two-factor authentication for external access, and automated expiry of inactive accounts. Nextcloud Files supports all of these natively.
Managed Nextcloud Enterprise deployments, such as those offered by Qsentinel on Swiss or on-premise infrastructure, combine these three layers into a single managed service, removing the operational burden of configuring and maintaining them separately.
The European Commission’s own Digital Markets Act monitoring has highlighted that Microsoft holds over 85% of the enterprise productivity suite market in Europe (European Commission, 2024), making diversification not only a security choice but increasingly a regulatory resilience strategy as authorities scrutinize vendor lock-in more closely.
FAQ
Is Nextcloud Files a like-for-like replacement for SharePoint?
Nextcloud Files covers the core SharePoint use cases: document storage, versioning, shared folders and team collaboration. It does not replicate SharePoint’s deep integration with Power Platform or legacy intranet publishing workflows, so organizations relying heavily on those should assess the gap before migrating.
Does hosting in Switzerland or the EU fully protect data from the US CLOUD Act?
Physical location alone is not sufficient. The CLOUD Act applies to any US-incorporated provider regardless of where data is stored. True protection requires a provider that is not a US legal entity and has no US parent company, combined with end-to-end encryption where the provider does not hold the decryption keys.
What access control features does Nextcloud Files offer compared to OneDrive?
Nextcloud Files supports granular access control including role-based permissions, password-protected share links, expiring shares, two-factor authentication and optional end-to-end client-side encryption. OneDrive offers comparable sharing controls but routes all access through Microsoft’s US-governed infrastructure.
What does post-quantum encryption add in a file-sharing context?
Post-quantum encryption protects data against future attacks from quantum computers capable of breaking current RSA and elliptic-curve algorithms. For files that must remain confidential for ten or more years, such as legal documents or medical records, this is a forward-looking requirement rather than a theoretical concern.
How long does a typical migration from SharePoint to Nextcloud take?
Migration timelines depend on data volume and the complexity of existing permission structures. A straightforward migration of shared drives without custom SharePoint workflows typically takes two to six weeks. Organizations with deeply customized SharePoint environments should plan for a phased migration over two to four months.
Hoe Qsentinel dit oplost
Qsentinel is the managed Nextcloud Enterprise workspace, enhanced by Qsentinel with post-quantum encryption and sovereign private AI, hosted in Switzerland or on-premise, out of reach of the CLOUD Act.