The European Commission, the executive arm of the European Union, is actively testing an open-source alternative to Microsoft Teams in what may become one of the most consequential technology procurement decisions in recent European institutional history. The move signals a deepening commitment by EU institutions to digital sovereignty and a growing unease with the bloc’s dependence on American Big Tech for critical communication infrastructure.
The initiative centers on Element, an open-source messaging and collaboration platform built on the Matrix protocol, which the Commission is piloting as a potential replacement for Microsoft Teams across its operations. The decision is not merely a technical evaluation but a political statement — one that aligns with years of European rhetoric about reducing reliance on foreign technology providers and asserting greater control over sensitive governmental communications.
A Sovereignty-Driven Shift Away From Redmond
As first reported by Slashdot, the European Commission’s exploration of Element is part of a broader institutional reckoning with the risks posed by proprietary software systems controlled by non-European entities. For years, European policymakers have voiced concerns about data flowing through servers controlled by U.S. companies, which are subject to American surveillance laws such as the CLOUD Act. These concerns have only intensified following the Schrems II ruling by the Court of Justice of the European Union, which invalidated the EU-U.S. Privacy Shield framework and cast a long shadow over transatlantic data transfers.
The European Commission currently relies heavily on Microsoft’s suite of productivity tools, including Teams, Outlook, and the broader Microsoft 365 ecosystem. This dependency has been a persistent point of contention among digital rights advocates, European parliamentarians, and open-source proponents who argue that the EU’s own institutions should practice what they preach when it comes to digital sovereignty. The European Data Protection Supervisor (EDPS) has previously raised red flags about the Commission’s use of Microsoft 365, questioning whether the arrangement complies with EU data protection regulations.
Element and the Matrix Protocol: A Decentralized Foundation
Element is built on the Matrix open standard, a decentralized communication protocol that allows organizations to host their own servers and maintain full control over their data. Unlike proprietary platforms such as Microsoft Teams, Slack, or Zoom, Matrix-based solutions do not require data to pass through centralized servers owned by a single corporation. This architecture is particularly appealing to government institutions and defense organizations that handle classified or sensitive information.
The Matrix protocol has already gained significant traction in European government circles. The French government adopted a Matrix-based messaging system called Tchap for interdepartmental communication, and the German military — the Bundeswehr — has deployed a Matrix-based platform called BwMessenger for secure communications among its personnel. These precedents lend credibility to the European Commission’s pilot and suggest that the technology has been battle-tested in high-security environments. Element, the company behind the most popular Matrix client, has positioned itself as the enterprise-grade solution for organizations seeking sovereign communication tools.
The Political Calculus Behind the Pilot
The timing of the Commission’s pilot is far from coincidental. Europe’s push for technological autonomy has accelerated dramatically in recent years, driven by geopolitical tensions, concerns about U.S. tech dominance, and a growing recognition that critical digital infrastructure should not be outsourced to foreign providers. The EU’s Digital Markets Act and Digital Services Act have already imposed new obligations on large technology platforms, and the bloc’s institutions are increasingly expected to lead by example.
European Commissioner for Digital Affairs has repeatedly emphasized the need for the EU to develop and adopt homegrown technological solutions. The testing of Element fits squarely within this agenda. By evaluating an open-source alternative to one of the most widely used enterprise communication platforms in the world, the Commission is sending a signal to both European industry and American tech giants: the era of unchallenged dominance by proprietary platforms in European government operations may be drawing to a close.
Technical Challenges and Institutional Inertia
Despite the political momentum behind the pilot, replacing Microsoft Teams across an institution as vast and complex as the European Commission is a formidable undertaking. The Commission employs approximately 32,000 staff members spread across multiple locations, primarily in Brussels and Luxembourg. These employees rely on Teams not just for messaging and video calls, but for document collaboration, calendar integration, and workflow automation — all features deeply embedded in the Microsoft 365 ecosystem.
Migrating away from such a deeply entrenched platform requires more than just installing new software. It demands retraining thousands of employees, ensuring interoperability with external partners who may still use Microsoft products, and replicating the seamless integration that Microsoft offers across its suite of tools. Element has made significant strides in enterprise features, including end-to-end encryption, voice and video conferencing, and bridging capabilities that allow communication with users on other platforms. However, skeptics question whether any open-source solution can match the polish and breadth of Microsoft’s offering at the scale required by the Commission.
The Financial and Strategic Stakes
The financial implications of the Commission’s decision are substantial. Microsoft’s contracts with EU institutions represent a significant revenue stream, and a high-profile defection by the Commission could embolden other European governments and institutions to follow suit. The Dutch government, for instance, has already conducted extensive assessments of Microsoft’s data practices and imposed conditions on its use of Microsoft products. A successful deployment of Element at the Commission level could catalyze a continent-wide reassessment of government technology procurement strategies.
For Element and the broader open-source ecosystem, the Commission’s pilot represents a potentially transformative opportunity. Element has raised venture capital funding and has been actively courting government clients, but landing the European Commission as a customer would be a watershed moment. It would validate the open-source model for enterprise communication at the highest levels of government and could unlock a wave of adoption across EU member states and their agencies.
Data Protection and the Regulatory Imperative
The data protection dimension of this decision cannot be overstated. The EDPS has been scrutinizing the Commission’s technology contracts with increasing rigor, and the use of Microsoft 365 has been a particular focus. In 2024, the EDPS issued findings that raised serious questions about whether the Commission’s use of Microsoft products met the stringent requirements of the EU’s General Data Protection Regulation. An open-source, self-hosted solution like Element would, in theory, eliminate many of these concerns by keeping data entirely within the Commission’s own infrastructure.
Moreover, the shift aligns with the EU’s broader cybersecurity strategy, which emphasizes the importance of supply chain security and reducing single points of failure. Relying on a single American vendor for critical communication tools creates a concentration risk that European security officials have increasingly flagged as unacceptable. The decentralized nature of the Matrix protocol directly addresses this concern by allowing the Commission to operate its own federated servers, ensuring that no external entity has access to or control over its communications.
What Comes Next for Brussels and Big Tech
The Commission’s pilot is still in its early stages, and a full-scale replacement of Microsoft Teams is far from certain. Institutional procurement decisions of this magnitude typically involve lengthy evaluation periods, extensive testing, and complex negotiations. Microsoft, for its part, is unlikely to cede this territory without a fight. The company has invested heavily in meeting European data residency requirements, including the establishment of EU Data Boundary commitments designed to keep European customers’ data within the bloc.
Nevertheless, the symbolic importance of the Commission’s decision to even test an alternative should not be underestimated. It represents a tangible manifestation of Europe’s digital sovereignty ambitions and a recognition that open-source solutions have matured to the point where they can credibly compete with the world’s largest software companies. Whether Element ultimately replaces Teams across the Commission or serves as leverage in future negotiations with Microsoft, the pilot has already achieved something significant: it has demonstrated that Europe’s most powerful institution is willing to explore a future beyond Big Tech’s walled gardens.
For the open-source community, for European digital sovereignty advocates, and for the technology industry at large, the European Commission’s experiment with Element is a story worth watching closely. The outcome could reshape how governments around the world think about the tools they use to communicate, collaborate, and govern.