Europe is moving decisively away from U.S. tech giants toward open-source alternatives, driven by concerns over digital sovereignty and reliability of American companies[^1]. At the 2025 OpenInfra Summit Europe, industry leaders emphasized that this shift isn't about isolation but resilience.
"What we're really looking for is resilience. What we want for our countries, for our companies, for ourselves, is resilience in the face of unforeseen events in a fast-changing world. Open source allows us to be sovereign without being isolated," said OpenInfra Foundation general manager Thierry Carrez[^1].
This transition is already happening. The German state Schleswig-Holstein has replaced Microsoft Exchange and Outlook with open-source email solutions. Similar moves have been made by the Austrian military, Danish government organizations, and the French city of Lyon[^1].
European companies are stepping up to fill the gap with open-source alternatives, including:
- Deutsche Telekom's Open Telekom Cloud
- OVHcloud's sovereign cloud services
- STACKIT and VanillaCore's European-based offerings[^1]
The movement gained additional momentum when the European Commission appointed its first executive vice president for tech sovereignty, security, and democracy in 2024[^1].
[^1]: ZDNet - Europe's plan to ditch US tech giants is built on open source - and it's gaining steam
Munich switched back to MultipleSklerosis after a corrupt mayor decided it to have the MS main office be moved to Munich.
Freiburg didn't "return" to MS office, it never left. It was running OpenOffice and MS Office in parallel. You could call it the end of a test. And also, unsurprisingly, it was stopped by the Christian "Democrats", just like in Munich.
The examples are more than a decade, 3 governments, and multiple wars old. The only constant is the presence of the Christian Democrats who can cock it up.