Big Tech is turning its energy dependence into a new way of steering the energy transition, as it is already becoming a provider of digital infrastructures and technologies that are crucial to operate renewable energy systems. This talk will explain in-depth how Amazon, Google and Microsoft are taking advantage of this window of opportunity to expand their structural power in global politics. It shows how the ownership of AI and data is helping these companies move into developing technologies which they promote as silver bullets for sustainability problems; and how governments around the world are adopting these ‘solutions’, increasing their dependencies on US Big Tech firms. It highlights how these patterns are accelerating within the EU, and the need to challenge Big Tech’s infrastructural power over sustainability transitions.