A conference powered by 
Green IO London
Where IT leaders tackle their own Sustainability challenges
Green IO and apidays London have partnered to gather 350+ responsible technologists to answer a simple question requiring complex answers: "Good for the Planet, Good for Business?" The rapid adoptio...
September 23 to 24, 2025
etc. venues 155 Bishopsgate, London EC2M 3YD
Call for speakers is now open!
All expertise is welcomed: green software engineering, low-carbon cloud and data center operations, responsible AI, sustainable design, low-carbon network and infrastructure, awareness and organizational challenge, Green IT landscape, etc.
Why they attended our past London editions
“Great set of speakers with a shared passion to have a conscious awareness of a sustainable use of tech to have a real positive impact on people and planet”
Rob Price, Founder (Accelleo)"Apidays London was a great conference, specifically the Green IO sustainability conference. Not something I have seen before but thought provoking and inspirational.”
Michala, Chief of Staff for SRE (Goldman Sachs)Thank you Gaël DUEZ for hosting a fantastic conference. I loved participating and as a speaker I was grateful for the warm welcome from the audience. Additionally, I was able to make hugely valuable connections, which will no doubt be helpful to to meet our ambitious Carbon Zero targets at Cambridge University Press & Assessment. Can't wait for next year!!
Julie Dennis, CTO (Cambridge University Press & Assessment)Meet our partners
Members of the London Green IT ecosystem as well as our corporate partners will be available to exchange with you on how to accelerate your digital sustainability journey.
Global Premium
Global Champion
Global Non Profit
Gaël Duez
Green IO Founder
About Apidays
Apidays is the world's leading series of API conference. In today’s intricate digital landscape, APIs have emerged as powerful conduits for innovation, bridging the gaps and unlocking new realms of possibility.
