The Enterprise Suite That Keeps Your Data in Europe
Email, collaboration, security, and endpoint management — built and hosted entirely in the EU. No CLOUD Act exposure. No US data transfers. Full GDPR compliance by design.
Trusted by forward-thinking European enterprises
The Problem
Your Data Isn't Safe With US Providers
Using Microsoft 365 or Google Workspace means your data is subject to US jurisdiction — even when stored in European data centers. This isn't a theoretical risk. It's the law.
CLOUD Act Exposure
US authorities can compel American cloud providers to hand over your data — regardless of where it's stored. EU servers don't protect you if the provider is American.
FISA Section 702
Broad surveillance powers allow mass data collection from non-US persons using US-based services. Your employees' communications may be monitored without a warrant.
Schrems II Uncertainty
The EU-US Data Privacy Framework remains legally fragile. A single court ruling could invalidate your data transfer basis overnight — again.
The Solution
Everything You Need, Built in Europe
A complete enterprise productivity suite that replaces Microsoft 365 — without any US jurisdiction exposure.
Enterprise email with custom domains, shared mailboxes, and calendaring — all encrypted and stored exclusively in EU data centers.
Learn moreCollaboration
Real-time document editing, video conferencing, team messaging, and file sharing with zero exposure to foreign surveillance laws.
Learn moreSecurity
Zero-trust architecture, advanced threat protection, DLP, and encryption — certified to ISO 27001 and SOC 2 Type II standards.
Learn moreEndpoint Management
Device enrollment, configuration, patch management, and remote wipe across Windows, macOS, Linux, iOS, and Android — from a single EU-hosted console.
Learn moreBuilt on 100% European Infrastructure
Every server, every data center, every network link — entirely within EU borders. We own and operate our infrastructure in Germany, the Netherlands, and France, with no upstream dependency on US hyperscalers.
- Data centers in Frankfurt, Amsterdam, and Paris
- No AWS, Azure, or GCP dependencies
- Redundant architecture with 99.99% uptime SLA
- Real-time data replication across EU regions
Infrastructure illustration
Zero US Access — By Architecture, Not Policy
It's not enough to promise data stays in Europe. Our architecture makes it technically impossible for US entities to access your data. No US parent company. No US employees with admin access. No CLOUD Act compliance obligations.
- German GmbH with no US parent entity
- All engineering and operations staff EU-based
- End-to-end encryption with customer-managed keys
- Regular third-party sovereignty audits
Privacy illustration
Seamless Migration From Microsoft 365
Switch without disruption. Our automated migration tools move your email, files, calendars, and contacts with zero downtime. Dedicated migration engineers guide you through every step.
- Automated mailbox and calendar migration
- File and SharePoint content transfer
- Active Directory / Entra ID sync
- Parallel run period with no service interruption
Migration illustration
Comparison
UnionStack vs Microsoft 365
The same productivity features you rely on — with the data sovereignty guarantees you need.
| Feature | UnionStack | Microsoft 365 |
|---|---|---|
| Email & Calendar | ||
| Real-time Collaboration | ||
| Video Conferencing | ||
| Endpoint Management | ||
| Advanced Threat Protection | ||
| Data stored exclusively in EU | ||
| No CLOUD Act exposure | ||
| No US parent company | ||
| Customer-managed encryption keys | ||
| EU-based engineering & operations | ||
| Sovereignty audit reports | ||
| GDPR-native architecture |
Testimonials
Trusted by European Enterprises
"Switching to UnionStack was the single most impactful decision we made for our data protection posture. Our legal team finally sleeps at night knowing our communications are truly beyond US jurisdiction."
Dr. Anna Weber
CISO, Rheinland Financial Group
"The migration from Microsoft 365 was remarkably smooth. Within two weeks, our 3,000 employees were fully operational on UnionStack with zero productivity loss. The collaboration tools are genuinely excellent."
Marcus Lindqvist
Head of IT, NordTech Industries
"As a healthcare provider, GDPR compliance isn't optional — it's existential. UnionStack gives us enterprise-grade productivity with sovereignty guarantees that no US provider can match."
Prof. Sophie Moreau
CTO, EuroMed Solutions
Ready to Take Back Control of Your Data?
Join hundreds of European enterprises that have already made the switch. Get a personalized demo and see how UnionStack can replace Microsoft 365 — with true sovereignty.