Vast.ai — AI supply-chain exposure

Vast.ai runs a marketplace that pools GPU capacity from many independent owners — from small data centers to individuals — and rents it out spot-style by the hour for AI workloads. It owns little of the hardware itself; its role is to match buyers who need compute cheaply with holders of otherwise-idle chips, sitting between the physical GPU fleet and the developers who train and run models on it.

Its structural significance is as a price setter at the commodity end of compute: by aggregating scattered capacity into one liquid pool, it helps establish a floor for what generic GPU time costs, pressuring the margins of anyone renting standardized hardware. The model keeps it at the edge of the chain because it is an aggregator rather than an owner — it captures the spread on other people's silicon, which is a thin, contestable position rather than a scarce one.