About the European Digital Resilience Index (EDRIX)

The European Digital Resilience Index (EDRIX) was created in response to two fundamental and interconnected crises facing the European Union: a severe and growing economic dependency on non-European technology, and a profound geopolitical realignment that turns this dependency into a critical strategic vulnerability.

Our mission is to provide a clear, data-driven, and honest assessment of Europe's digital sovereignty. We move beyond traditional policy analysis to measure tangible, real-world outcomes across the digital ecosystem. The EDRIX is not an academic exercise; it is a diagnostic tool designed to expose structural weaknesses, identify hidden strengths, and inform the industrial policy now urgently needed to build a resilient and autonomous digital future for Europe.

What is the EDRIX?

The EDRIX is a composite index that provides a holistic measure of a nation's ability to create, deploy, and use technology independently. Since the June 2026 redesign (version 2.0), it rests on four pillars that are refreshed quarterly from public, automatically-collectable data sources:

  1. Developer Ecosystem — the density of the country's developer community, normalized per inhabitant.
  2. Grassroots Adoption — the on-the-ground digital choices of citizens and businesses, captured through Linux share on desktops and laptops and the share of European / non-US browsers.
  3. Private sector resilience — the digital sovereignty of the country's private-sector technology choices, assessed through the hosting infrastructure of high-traffic national domains.
  4. Public sector resilience — the resilience of core government and official digital infrastructure, assessed through the hosting of head-of-state, government, and capital-city websites.

See the methodology page for the precise definition of each pillar, the data sources, and the historical changes between the September 2025 inaugural publication (version 1.0, five pillars including OSOR-based Public Policy) and the current version 2.0.

Our principles

Our work is guided by a core set of principles:

  • Data over opinion. Our findings are grounded in quantitative, verifiable metrics, not subjective assessment. An honest diagnosis requires impartial data.
  • A holistic, ecosystem-based view. True sovereignty is not merely a reflection of government policy. It is the sum of a nation's entire capacity — from its developers and businesses to its public institutions and citizens.
  • A tool for action, not just analysis. This index is designed to be used. Its purpose is to help policymakers, industry leaders, and citizens identify specific strengths to build upon and critical weaknesses to address.
  • Transparency and openness. Our methodology is published in full, our primary data sources are public, and every quarterly publication is archived alongside the inputs that produced it. The process of measuring sovereignty must itself be transparent.
  • Automation and reproducibility. Since version 2.0, every value in the index is automatically refreshable from a public source. The index is published quarterly. The historical archive lets any reader recompute a past edition exactly.

Who we are

The EDRIX was created and is maintained by Stefane Fermigier, a veteran Open Source tech entrepreneur. He is the founder and CEO of Abilian, a French Open Source company, and a co-founder and co-chairman of both CNLL (the French Open Source business association) and APELL (its European counterpart).

He is also a member of the EuroStack Industry Initiative, a volunteer-driven, non-lobby and non-partisan collective of technologists, economists, entrepreneurs, and policy experts from across Europe, united by a shared sense of urgency around European digital sovereignty. EuroStack provides the policy backdrop and the original motivation for the index.

Data sources

The current EDRIX (version 2.0) is computed from:

  • Cloudflare Radar — operating-system and browser-family shares of human traffic from desktops and laptops, per country, used for the grassroots adoption pillar. We use Cloudflare's volume-weighted aggregates over a trailing 90-day window, with the same filters anyone can apply on the public dashboard.
  • GitHub Innovation Graph — GitHub's official, openly published quarterly dataset of developer activity per country, used for the developer ecosystem pillar.
  • A publicly-available list of high-traffic domains (such as Cloudflare Radar's top-domain list or Cisco Umbrella's equivalent), restricted to EU27 national TLDs and sampled per country.
  • A curated list of public-sector / official domains (~3 per country: head of state, government portal, capital city), maintained as part of the index.

These five inputs are passed through a sovereignty rating algorithm — assessing each domain's web and mail server hosting by country and ASN — and combined according to the methodology described on the methodology page.

Influences and related work

Several pieces of prior work inform our motivation and our analytical framework, even when they are not direct data inputs into the current index:

Get involved

The challenge of building a resilient digital Europe is a collective one. We welcome collaboration, feedback, and engagement from all stakeholders. To learn more or to get in touch, please visit the EuroStack Industry Initiative website.