France orders 2.5 million government workers off Windows and onto Linux

France has given every ministry in the country a deadline to produce a formal plan for eliminating dependence on non-European technology — covering operating systems, collaboration tools, artificial intelligence platforms, cloud infrastructure, and security software. The directive, issued by the Interministerial Digital Directorate known as DINUM on April 8, 2026, is the most comprehensive digital sovereignty measure any European government has announced to date. At its center is an explicit instruction: replace Microsoft Windows with Linux across the French state’s entire computing estate, which runs to approximately 2.5 million workstations.

The move did not emerge from nowhere. France has been building toward this for years, assembling the policy rationale, the technical alternatives, and the political will simultaneously. What changed in April 2026 is that the rationale hardened into obligation. The Trump administration’s unpredictability toward European allies, combined with a broader reassessment of what it means to run critical national infrastructure on software whose pricing, updates, and security decisions are controlled by a foreign company, pushed France from “we should reduce dependency” to “we must eliminate it.”

The evidence that it can actually work

The most important fact in the French announcement is one that rarely leads the coverage: this has already been done, at scale, inside France, by one of its most operationally demanding institutions. The Gendarmerie Nationale — France’s national military police force, responsible for public safety across roughly 95% of the country’s territory — began migrating its workstations to a custom Ubuntu-based system called GendBuntu in the early 2000s. By June 2024, GendBuntu ran on 103,164 workstations, representing 97% of the force’s entire computing estate. The financial result is unambiguous: the project saves approximately two million euros per year in licensing fees and has reduced total cost of ownership by an estimated 40%.

DINUM cited the Gendarmerie explicitly as the governance model for the national rollout. That citation is significant. It means French policymakers are not proposing an untested experiment — they are proposing to replicate a documented success at larger scale. Germany’s state of Schleswig-Holstein provides a second data point: it completed nearly 80% of a 30,000-workstation migration from Microsoft to Linux by early 2026, recording savings of €15 million in licensing costs during 2026 alone. The pattern both cases illustrate is consistent: phased migration with coherent governance, internal support functions, and sustained political will outperforms attempts to switch everything at once.

What the directive actually requires

The scope extends well beyond operating systems. Ministries are required to map and reduce dependencies across eight categories: workstations and OS, collaboration and communication tools, antivirus and security software, artificial intelligence and algorithmic platforms, databases and storage, virtualization and cloud infrastructure, and network and telecommunications equipment. The software replacement strategy for common desktop tasks already exists in the form of La Suite Numérique — a stack of sovereign productivity tools developed and maintained by DINUM, hosted on Outscale servers, a subsidiary of Dassault Systèmes, and certified SecNumCloud by the French national cybersecurity agency ANSSI. As of the announcement, La Suite had been tested by approximately 40,000 regular users across government departments before the broader mandate came into effect.

DINUM itself, which employs roughly 250 agents, will migrate its workstations first — establishing the model before other bodies follow. Each remaining ministry must submit its own reduction plan by autumn 2026. A first round of “Industrial Digital Meetings” is scheduled for June 2026, where DINUM intends to formalize public-private coalitions to support the transition. No specific Linux distribution has been named in the public announcement; individual ministries retain flexibility to choose their migration path within the broader framework.

The political calculation

French minister David Amiel, Minister of Public Action and Accounts, did not use diplomatic language in the accompanying statement. The declaration that “the state can no longer simply acknowledge its dependence — it must break free” and that France “must become less reliant on American tools and regain control of our digital destiny” was a direct political statement, not administrative boilerplate. It explicitly named the United States as the source of the dependency France intends to break.

This is part of a pattern that predates the current directive. In January 2026, France announced it would replace Microsoft Teams and Zoom with a domestically developed platform called Visio — built on the open-source, end-to-end encrypted video conferencing tool Jitsi — across 2.5 million civil servants by 2027. The health data migration to a sovereign infrastructure is also underway, with a deadline of end 2026. The Linux directive is the largest piece of the same puzzle, but it did not arrive in isolation.

The European Parliament has also recently voted to reduce its reliance on foreign technology providers. Schleswig-Holstein’s migration is explicitly cited across European capitals as a replicable model. What France is doing is leading a movement that already has momentum, not starting one from scratch.

Where the skepticism is warranted

The history of announced government Linux migrations is, frankly, mixed. Munich’s LiMux project — once the most celebrated municipal Linux migration in Europe — was reversed in 2017 after years of compatibility complaints, political pressure from Microsoft, and the genuine friction of managing a heterogeneous software environment at scale. That reversal was cited for years as evidence that large-scale government Linux deployments were operationally impractical.

The counterargument, which French policymakers are clearly making, is that the technical landscape in 2026 is fundamentally different from 2017. Browser-based productivity workflows have reduced the dependency on native Windows applications. LibreOffice has matured considerably. The cloud infrastructure underlying most enterprise software is now largely platform-agnostic. And the Gendarmerie’s long-term operational data provides a French-specific proof of concept that Munich’s experience does not invalidate.

What remains genuinely uncertain is how the transition will work for the ministries with the most specialized legacy software dependencies — defense procurement systems, tax administration platforms, judicial case management tools — where the migration path from Windows-native applications is neither simple nor cheap. DINUM’s June 2026 industrial meetings will need to address this directly, and the autumn 2026 deadline for ministry plans will reveal which institutions have a credible path and which are still working one out.

The directive is confirmed and in force. Ministry migration plans are due by autumn 2026, with DINUM’s own workstation transition already underway.