European Alternatives to Microsoft 365

Microsoft 365 (formerly Office 365) is the dominant office productivity suite. German and Dutch DPAs have raised serious concerns about its data processing practices.

3 European alternatives foundCategory: office-suites

Why switch from Microsoft 365?

  • German and Dutch DPAs have found Microsoft 365 data processing problematic
  • Telemetry data collection has been flagged as excessive by EU regulators
  • All data processed under US jurisdiction via the CLOUD Act
  • Open-source alternatives eliminate vendor lock-in and subscription dependency

Best European Alternatives to Microsoft 365

1

ONLYOFFICE

🇱🇻 Latvia, Riga

ONLYOFFICE — European alternative

Key advantages:
  • Full-featured editors for documents, spreadsheets, presentations, PDF, and forms with native DOCX/XLSX/PPTX support
  • Real-time collaborative editing with co-authoring, track changes, and commenting
  • Self-hosted and cloud deployment options with on-premise control for data privacy
Open SourceFree TierGDPR
Full reviewVisit ONLYOFFICE
2

Grommunio

🇦🇹 Austria, Vienna

Grommunio — European alternative

Key advantages:
  • Drop-in Microsoft Exchange replacement with full MAPI, EWS, EAS, CalDAV, CardDAV, IMAP, POP3, and SMTP protocol support
  • Native compatibility with Microsoft Outlook without requiring client-side MAPI extensions
  • Integrated suite covering email, calendar, contacts, tasks, notes, chat, video conferencing, and file storage
Open SourceFree TierGDPR
Full reviewVisit Grommunio
3

Nextcloud Office

🇩🇪 Germany, Stuttgart

Nextcloud Office — European alternative

Key advantages:
  • Collaborative real-time editing of documents, spreadsheets, presentations, and drawings powered by Collabora Online
  • Full read/write support for DOCX, XLSX, PPTX, and a wide range of open document formats
  • Deep integration with the Nextcloud ecosystem including Files, Talk, Mail, Calendar, and Tasks
Open SourceFree TierGDPR
Full reviewVisit Nextcloud Office

How They Compare to Microsoft 365

ProductCountryOpen SourceFree TierFounded
Microsoft 365USNoVaries—
ONLYOFFICE🇱🇻 LatviaYesYes2009
Grommunio🇦🇹 AustriaYesYes2019
Nextcloud Office🇩🇪 GermanyYesYes2016

Also looking for alternatives to...

Alternative toGoogle Workspace
→
Alternative toMicrosoft Outlook
→
Alternative toMicrosoft Teams
→

Frequently Asked Questions

What is the best European alternative to Microsoft 365?

ONLYOFFICE (Latvia) is the closest feature match with document, spreadsheet, and presentation editors plus team collaboration. LibreOffice is the strongest desktop alternative. CryptPad offers encrypted real-time collaboration.

Can European office suites open Microsoft files?

Yes. ONLYOFFICE, LibreOffice, and SoftMaker Office all have excellent Microsoft format compatibility (.docx, .xlsx, .pptx).

Migration guide coming soon

We're building a step-by-step guide for migrating from Microsoft 365 to European alternatives. Sign up to be notified when it's ready.

Back to homepage