Microsoft’s AI cloud business depends on select tech partners

When roughly 70% of your AI revenue flows through a single partner, you don’t have a strategy. You have a dependency. That’s the position Microsoft has found itself navigating as its Azure cloud division becomes increasingly central to the company’s growth story, with OpenAI serving as the engine behind most of that momentum. Microsoft revised its partnership terms with OpenAI in April 2026, structuring a deal that maintains primary cloud access and a capped revenue share arrangement through 2030. Translation: Microsoft locked in the relationship but put a ceiling on how much of the upside it has to share. At its Build 2026 developer conference, Microsoft unveiled seven proprietary MAI models built entirely in-house. The company also emphasized its work on chip co-design, signaling that it wants to control more of the AI stack from silicon to software. Beyond its own models, Microsoft has been assembling a roster of third-party AI providers through Azure Foundry, a platform that gives enterprise customers access to models from Anthropic, Mistral, Meta, and others. The Mistral partnership deserves particular attention. Microsoft expanded its collaboration with the French AI company ...