Unknown upstarts behind the AI boom are stoking fears the bubble could pop

A group of little-known “neocloud” data-center operators—CoreWeave, Nebius and others—has become a flashpoint for investors worried the AI boom is overextended. These firms lease GPU-rich capacity to Big Tech and leading model developers, financing rapid buildouts with heavy debt secured by long-term customer contracts and hardware. Analysts at Gartner and Forrester see a wave of consolidation ahead, warning most independents may not survive, especially if hyperscalers temper capex or rates stay high. Shares of several players have slumped as Microsoft and Google signaled a slower pace of AI spending, even as demand for compute still outstrips supply. With roots in crypto mining, the sector’s fortunes hinge on continued AI investment, stable financing, and relief from mounting power and community pushback.

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