Microsoft 365 Alternative: The Complete Comparison 2026

Why companies look for a Microsoft 365 alternative

Microsoft 365 is the market leader: but not the right choice for every company:

• US CLOUD Act: US authorities can access data, even in EU data centers.
• GDPR uncertainty: Third-country transfers require addendums and risk assessments.
• Costs: Complex licensing models and hidden costs burden budgets.
• Dependency: Products, prices and terms can change at any time.

The criteria for a fair comparison

• Email, files, office and video conferencing in one platform
• GDPR compliance without addendums
• Data stored exclusively in Germany
• Compatibility with Microsoft formats
• Transparent pricing

Souvera Workspace: the sovereign alternative from Germany

Souvera Workspace unites email, file storage, online office, chat and video conferencing in one interface: operated exclusively in German data centers. Every customer gets a dedicated mail server, and your data is subject exclusively to German law.

Prices in comparison

Souvera starts at €4.99 per user per month: including a dedicated mail server, 200 GB storage and the Shield security suite. Microsoft 365 Business Standard costs €12.50 per user: without a dedicated mail server and with GDPR addendums.

Other alternatives at a glance

Nextcloud (self-hosted)

A strong open-source platform: but self-hosting means your own servers, maintenance, updates and security responsibility.

OpenDesk

Bundles open-source components, but must be self-hosted and maintained. For small IT teams the effort is considerable.

Google Workspace

Functionally strong, but a US provider: the same GDPR and CLOUD Act problems as Microsoft.

Conclusion: which alternative is right?

If you are looking for a turnkey, GDPR-compliant Microsoft 365 alternative without administration effort, Souvera Workspace is the right choice: German data centers, dedicated mail server, transparent prices and personal support from Germany.