How Europe Is Building a Sovereign Digital Stack, From Search to Chips

The European Parliament's Search Engine Switch

Effective June 4, 2026, searches conducted through the address bar on the Firefox and Edge browsers on European Parliament devices will default to Qwant, the Paris-based search engine that markets itself on privacy and compliance with EU data rules . An internal email to staff, reported by Politico, stated the change was made "in line with the Parliament's commitment to digital sovereignty and the protection of users' personal data" .

The shift from Google to Qwant is a specific, practical move at the 'search' layer of the digital stack. It follows years of EU focus on the power of default settings, with research showing that 95% of users stick with their pre-set search engine . The French government previously made similar moves, with the National Assembly and Army Ministry adopting Qwant over concerns about U.S. surveillance .

The Tech Sovereignty Package and Cloud Procurement Rules

The search engine switch occurs just as the European Commission finalizes a far more consequential set of measures. The Tech Sovereignty Package, formally published on June 3, 2026, contains two headline instruments :

1. The Cloud and AI Development Act: This legislation introduces strict new criteria for cloud computing services in "highly critical" state tenders—those handling sensitive data such as financial records, health information, and judicial files . Draft documents seen by Reuters indicate these rules would effectively bar Amazon Web Services, Microsoft Azure, and Google Cloud from such public-sector contracts . To be eligible, providers must reach a Data Sovereignty assurance level called SEAL-2, meaning they abide by EU laws without requiring the customer to implement extra technical measures to protect data . These three U.S. companies currently hold a combined share of roughly 70% of Europe's cloud infrastructure market .
2. The Updated Chips Act: A revised version of the EU's semiconductor legislation will grant Brussels emergency powers to override private supply contracts and force chipmakers to prioritize EU orders during critical shortages .

This package does not represent a blanket ban. The strictest restrictions target only government and public-sector workloads where data sovereignty is deemed most critical; private-sector cloud usage remains untouched for now . The Commission had already laid groundwork by awarding a €180 million, six-year tender for sovereign cloud services, with eligibility dependent on rigorous data sovereignty assurance levels that limit control by non-EU third parties .

How These Moves Realize the EuroStack Vision

The EuroStack concept, coined by Glen Weyl in 2024 and developed into a major policy blueprint by Francesca Bria and Paul Timmers, calls for mobilizing €300 billion over 10 years to build independent European digital infrastructure . It frames digital infrastructure as a strategic necessity comparable to energy grids or telecom networks . The European Commission's DIGITAL Building Blocks page explicitly endorses the EuroStack report for making "a convincing argument that Europe needs to invest in its digital sovereignty, actively re-shaping the European digital ecosystem to be more resilient and less dependent on BigTech" .

The practical impact can be understood through the specific layers of the digital stack now being addressed:

• Search Layer: Qwant replaces Google on European Parliament devices. Furthermore, in March 2026, Qwant and Ecosia—Germany's tree-planting search engine—jointly wrote to all 27 EU leaders offering to build a sovereign search infrastructure for the continent, framing the absence of such as a catastrophic loss of control over the gateway to Europe's digital economy . They are also collaborating to build their own European search index, aiming to reduce their reliance on APIs from Microsoft's Bing and Google .
• Cloud Infrastructure Layer: The Cloud and AI Development Act aims to restrict U.S. hyperscalers from processing sensitive government data, enforcing a SEAL-2 data sovereignty standard that requires compliance with EU law at the provider level .
• Hardware Layer: The revised Chips Act gives the EU authority to override existing private supply contracts during shortages, addressing physical supply chain dependencies .

From Rhetoric to Enforcement

What distinguishes the current moment is the shift from policy papers to binding instruments. The European Commission is no longer merely describing digital sovereignty goals. Through its Cloud Sovereignty Framework (which introduced the SEAL scoring system in September 2025), the €180 million sovereign cloud tender awarded in May 2026, and the legislative package presented on May 27 and formally published on June 3, the bloc is operationalizing its strategy .

The immediate impact on U.S. tech giants is significant, given their dominant 70% share of Europe's cloud market. However, it is also important to note that the rules do not constitute an outright ban. Non-European technologies can still meet the minimum sovereignty requirements—if operated within a strict and appropriate framework that satisfies the SEAL-2 level . The path from proposal to implementation also remains long; the Cloud and AI Development Act will require unanimous approval from all 27 member states before taking effect .

The Qwant switch is the visible, institutional tip of this iceberg. The cloud procurement rules and chips override powers represent the deep, structural enforcement. Together, they demonstrate that the EuroStack is no longer a pitch document or an academic report—it is a legislative reality with procurement power behind it.