The Swiss government is exploring open source software as a strategic alternative to Microsoft 365, aiming to enhance digital independence and resilience. The Swiss Federal Chancellery, which oversees the administration of federal departments, is implementing an open source platform called openDesk, developed in Germany, to handle essential tasks like email, calendars, documents, and video conferencing. Around 3,000 of the 47,000 employees involved in key operations will use this platform by the end of 2027. The initiative is framed as a way to maintain control over critical digital processes, especially in times of crisis, rather than an immediate full replacement for Microsoft's software. The deployment of openDesk will occur alongside the continued use of Microsoft 365, serving as a backup solution in case of disruptions. The initial phase of the project, which will cost about 9 million Swiss francs, is being funded through parliamentary credits. This phase focuses on building the platform and assessing the costs and logistics of a potential wider rollout. However, the transition is complex, requiring significant customization, security assessments, and the development of internal expertise, given the deep integration of many applications with Microsoft's systems. In contrast, the Swiss Armed Forces are adopting openDesk at a much faster pace. By October, all personnel in the Cyber Command and its "Cyber and Electromagnetic Actions" unit will be required to use the platform. This urgency is driven by concerns over the CLOUD Act, a U.S. law that allows American authorities to request data from U.S. technology companies, even if the data is stored abroad. For a military organization handling classified information, the risk of foreign access is seen as unacceptable, prompting a swift shift to open source solutions. This move by Switzerland is part of a larger European effort to reduce reliance on U.S.-based cloud services and hyperscalers. Open source software is increasingly viewed not just as a development model but as a tool for maintaining operational independence and digital sovereignty. While the Swiss government has not yet decided to implement openDesk across the entire federal administration, the initial deployment highlights a growing trend: a global shift toward European-based open services as an alternative to proprietary U.S. platforms.