Nextcloud vs. OneDrive vs. SharePoint – The Honest 2026 GDPR Comparison
Nextcloud vs. OneDrive vs. SharePoint – The Honest 2026 GDPR Comparison
Searches for "OneDrive GDPR alternative" have quintupled since 2024. The reason: data-protection authorities have hardened their stance, Microsoft has admitted under oath that its "EU Data Boundary" doesn't provide real sovereignty, and Schrems III is on the horizon. On top of that, NIS2 has been binding around 29,000 German companies to strict information-security duties since 2026 — and the BSI IT-Grundschutz catalogue cannot be fully satisfied with OneDrive/SharePoint.
Here's the honest comparison.
The three contenders
- Microsoft OneDrive – Cloud storage for individuals, included in Microsoft 365 Business
- Microsoft SharePoint – Team and enterprise file hosting, workflows, intranet
- Nextcloud – Open-source platform, self-hosted or managed
Side-by-side
| Criterion | OneDrive Business | SharePoint Online | Nextcloud (europioneer Managed) |
|---|---|---|---|
| Storage per user | 1 TB (up to 5 TB) | 1 TB pool + 10 GB/user | Freely scalable |
| Hosting region | Microsoft choice (EU Data Boundary) | Microsoft choice | Germany / EU (your choice) |
| Affected by CLOUD Act | ✅ Yes | ✅ Yes | ❌ No |
| GDPR-compliant | ⚠️ Disputed | ⚠️ Disputed | ✅ Yes |
| Data-processing agreement (DPA) | Microsoft Online Services Terms | Microsoft Online Services Terms | europioneer DPA, EU law |
| In-browser Office editing | ✅ Word/Excel/PowerPoint Online | ✅ | ✅ ONLYOFFICE or Collabora |
| Versioning | ✅ | ✅ | ✅ |
| External sharing | ✅ | ✅ | ✅ (with password, expiration) |
| Mobile apps | ✅ iOS, Android | ✅ | ✅ iOS, Android |
| Desktop sync | ✅ Windows, Mac | ✅ | ✅ Windows, Mac, Linux |
| End-to-end encryption | ❌ (only Vault) | ❌ | ✅ Optional (E2EE app) |
| Workflow automation | Power Automate (paid) | ✅ included | ✅ Nextcloud Flow |
| Intranet / Wiki | ❌ (only in SharePoint) | ✅ | ✅ Nextcloud Pages / Collectives |
| Cost per user/month | €5–10 | €5–25 | €4–8 (managed) |
| Vendor lock-in | ✅ | ✅ | ❌ (open source, exportable) |
| Single sign-on | Azure AD | Azure AD | Keycloak, SAML, OIDC, LDAP |
| Custom integration API | Graph API (Microsoft auth) | Graph API | WebDAV, OCS API, plugin system |
What regulators say (2025/2026)
- German Federal Data Protection Commissioner: "The use of Microsoft 365 in federal agencies is, in many configurations, not data-protection compliant."
- Datenschutzkonferenz (DSK): Recommendation against Microsoft 365 in schools, joined by 16 federal states
- Hesse DPA: Prohibition of Microsoft 365 in schools
- Berlin DPA: Recommendation against Microsoft 365 in public administration
- French CNIL: Comparable warnings
- EDPS (EU Data Protection Supervisor): EU Commission must reduce its own Microsoft usage
No German or European DPA has unconditionally recommended Microsoft 365 in 2025/2026.
Concrete costs for 30 users
Microsoft 365 Business Premium (with SharePoint)
- Licences: 30 × €26 = €780 / month
- Annual: €9,360
- Plus backup solution (e.g., Veeam) ≈ €1,200/year
- Total: ~€10,560 / year
europioneer Nextcloud Managed
- Hosting + licences: €149 / month (30 users)
- Annual: €1,788
- Backup included
- One-off migration: €690
- Year-1 total: €2,478 — savings: ~€8,080 (more in the Microsoft 365 cost comparison)
When does OneDrive/SharePoint still make sense?
Honestly, in some scenarios:
- When your tooling is deeply embedded in Microsoft 365 (Power Platform, Dynamics 365, hundreds of Azure AD federations)
- When a customer contract explicitly demands Microsoft (rare, but it happens)
- When you knowingly accept the CLOUD Act risk and disclose it contractually to your own customers
For all other SMEs, schools, associations, medical practices, and public bodies, Nextcloud is the rational choice — today more than ever.
Migration with europioneer
- Data migration fully automated (rclone, OneDrive connector)
- Single sign-on retained
- Office files keep working (.docx, .xlsx, .pptx are edited with ONLYOFFICE)
- Outlook contacts and calendars move to Nextcloud CalDAV/CardDAV
- Staff workshops included
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