The European Commission thinks AWS and Microsoft's Azure should get the same "gatekeeper" label the EU has mostly reserved for platforms like Google Search and the App Store, companies so dominant that ordinary competition law can't keep up, so the Digital Markets Act gives regulators sharper tools instead[1]. The reasoning this time is specifically about AI. Both companies bundle their own AI models and tooling directly into cloud infrastructure, and the Commission's theory is that once a business builds its AI stack on top of one of these clouds, switching away gets a lot harder, not because the cloud itself is uniquely sticky, but because of the AI layered on top of it[1][2].

I think this feels different from most "Big Tech gets fined" stories because of what it's actually targeting. Every gatekeeper designation so far has been about something a person clicks on, a search bar, an app store, a social feed. This one is about the layer underneath all of that, the infrastructure most people using AI tools every day have never heard of. If the EU applies gatekeeper rules to cloud infrastructure, it's saying the thing that needs guardrails isn't just the product you see, it's the pipes everything runs through.

Both companies are in their response window right now, arguing their case before Brussels decides anything final. If the designation sticks, they'd get six months to open up interoperability and data access, and DMA fines can hit 10% of a company's entire global revenue, not just what it makes in the EU[1]. That's not a cost of doing business. That's a number built to actually change behavior.

I'll be reading the response filings closely, because whichever way this goes, it's the first real test of whether "gatekeeper" as a legal category can reach past the apps on your phone and into the infrastructure none of us ever see[3].