Green IO Paris 2025: Building European Green IT

Green IO Paris 2025 is where tech leaders join forces to overcome unprecedented sustainability challenges in IT. Taking place December 9-11, 2025 at CNIT, La Défense in Paris, this conference brings together 800+ responsible technologists from across Europe and beyond to explore how to build a more sustainable and resilient digital world.

Why Green IO Matters Now

With the explosive adoption of generative AI, governmental pushbacks against climate policies, and the ever-increasing hegemony of tech giants, European actors in IT sustainability face major headwinds. And yet numerous initiatives are blossoming all across the continent to build a more sustainable and resilient digital world.

Green IO Paris 2025 will explore how to best leverage all these green IT initiatives across Europe. Which GreenOps practices to replicate? Which tools to adopt? When should we join forces, and when should we embrace local agility instead?

Conference Highlights

Diverse Expertise & Perspectives

The conference provides a perfect blend of diverse expertises—from responsible AI, green software, sustainable design, and green cloud technologies to sustainable hardware—and an equally rich mix of perspectives, including practitioners, experts, and academics.

What Attendees Can Expect

High-Quality Talks: Latest research, world-class use cases, technical deep-dives, and more covering the full spectrum of green IT practices.

European Focus: Explore how European actors are building sustainable digital solutions, with insights into replicable GreenOps practices and tools.

Networking & Collaboration: Connect with 800+ responsible technologists from 20+ countries, creating synergies and collaboration opportunities.

Sustainable Digital Challenge: Attendees get access to the finals of the Sustainable Digital Challenge, where teams from INSEE, Younited, Botify.com, Enedis, SNCF, BPI, Groupama, and Axa will share hands-on use cases.

Green IO Village: Meet corporate partners as well as NGOs making the European digital sustainability scene so lively.

Conference Program

Day 1: Workshop Day (December 9, 2025)

The conference kicks off with a full day of workshops covering practical tools and methodologies:

• Cloud Emissions & Cost Optimization: Engineering workflows using Infracost & Greenpixie to reduce cloud emissions while saving millions
• Environmental Assessment at Scale: How Eviden uses Resilio DB for automated and agile environmental footprint assessment
• Electricity Maps Enterprise API: Leveraging real-time carbon intensity data for Green IT solutions
• TCO Certified Cloud: The first sustainability certification for cloud services
• LLM Environmental Footprint: Deep dives into measuring and reducing the environmental impact of Large Language Models
• EROOM Framework: A practical approach to dividing environmental impact every year
• carbon.txt: Boosting transparency inside organizations

Days 2-3: Main Conference (December 10-11, 2025)

The main conference features 40+ speakers covering:

• Responsible AI: Measuring and reducing the environmental footprint of AI systems
• Green Software: Best practices for sustainable software development
• Green Cloud Technologies: Carbon-aware infrastructure and FinOps practices
• Sustainable Hardware: Performance and sustainability lessons from data center projects
• GreenOps Practices: Real-world implementations from leading European organizations
• Policy & Strategy: Navigating regulatory environments and building sustainable IT strategies

Featured Speakers & Organizations

The conference features an impressive lineup including:

• Chris Adams (Green Web Foundation)
• Niki Manoledaki (CNCF Sustainability group)
• Olivier Vergeynst (Institute for Sustainable IT Belgium)
• Russell Trow (Green Software Foundation)
• Tim Cowlishaw (Green Web Foundation)
• Vincent Poncet (Google)
• Wiebren van der Zee (Nationale Coalitie Duurzame Digitalisering)

And many more experts from leading organizations including Credit Agricole, Amadeus, Decathlon Digital, Mastercard, and others.

Sustainable Digital Challenge

The conference includes the finals of the Sustainable Digital Challenge, featuring teams from:

• INSEE
• Younited
• Botify.com
• Enedis
• SNCF
• BPI (Bpifrance)
• Groupama
• AXA

These teams will share hands-on use cases demonstrating practical approaches to digital sustainability.

Why Green IO Paris Matters

Green IO Paris represents more than just a conference—it’s a platform where global responsible technologists meet, share best practices, support each other, create synergies and collaboration opportunities. Nothing beats human connection to overcome the biggest challenges of our time.

For anyone genuinely trying to blend sustainability and IT practices in Europe, Green IO Paris is THE place to be. The conference addresses critical questions:

• How can European actors leverage green IT initiatives effectively?
• Which GreenOps practices should be replicated across organizations?
• What tools should teams adopt for sustainable IT?
• When should organizations join forces, and when should they embrace local agility?

Venue & Location

CNIT Forest - La Défense
La Défense, Paris, France

The conference is part of the Future Of Software Technology conference series, powered by Apidays, the world’s leading series of API conferences.

Registration & Participation

Tickets are available with various options including workshops, networking opportunities, and access to both the main conference and the Sustainable Digital Challenge finals. The Green IO tickets also provide access to the Green IO village for meeting corporate partners and NGOs.

Learn more and register at greenio.tech for tickets, speaker applications, and detailed program information.

Green IO Paris 2025 is organized as part of the Future Of Software Technology conference, powered by Apidays, bringing together the European green IT community to build a more sustainable digital future.