Here's When Amazon's ROI Will Pull Ahead of Microsoft's in the AI Cloud Spend War

The article compares Microsoft and Amazon in the AI cloud spending race and argues that Microsoft is already monetizing AI through Copilot and Azure, while Amazon is still in the heavy investment phase. Microsoft reported an AI annual revenue run rate of $37 billion, over 20 million paid Copilot seats, and strong visibility from a $627 billion RPO backlog. Amazon’s AWS grew 28% to $37.59 billion, but the company generated negative free cash flow as it spent aggressively on capex and custom Trainium chips. The writer argues Amazon’s ROI could overtake Microsoft’s around mid-to-late 2027, when large 2025-2026 infrastructure investments begin producing full revenue and margin benefits. The piece is bullish on Amazon’s long-term margin leverage but acknowledges Microsoft is the cleaner near-term cash generator.