Microsoft Teams is the incumbent, but Nextcloud offers a European alternative rooted in EU data laws and stronger digital sovereignty.
Incumbent Solution
Microsoft Teams is a unified communications and collaboration platform by Microsoft Corporation. Integrated with Office 365, it combines workplace chat, video meetings, and file storage, subject to US jurisdiction.
Microsoft Teams ownership profileEU Challenger
Nextcloud is a German open-source collaboration platform offering file sync, calendar, video calls, and communication tools. Fully self-hostable and EU-owned, it is the leading European alternative to Google Workspace and Dropbox for on-premise deployments.
Visit NextcloudNextcloud ownership profile| Metric | Microsoft Teams | Nextcloud |
|---|---|---|
| Headquarters | Redmond, US | Stuttgart, DE |
| Ownership | subsidiary · NASDAQ | private |
| Tax Domicile | US | DE |
| Ultimate Parent | Microsoft Corporation | Nextcloud GmbH |
| Data Hosting | mixed | mixed |
| CLOUD Act Exposure | Yes ⚠️ | No ✓ |
| AI Trains on User Data | partial | no |
| GDPR | compliant Antitrust fines related to software bundling practices; Microsoft decoupled Teams from Office in the EEA in 2024 to address EU antitrust concerns. | compliant |
| DSA Designation | VLOP | na |
| Carbon Neutral | certified | no |
| B Corp | No | No |
| Supply Chain | disclosed | opaque |
| Repair / Recycling | No | No |
Last verified . Sources: Microsoft Teams on Wikidata, Microsoft Teams website, Nextcloud website, How we audit.
Rigorous data for ethical digital consumption.