Bare-metal GPU clusters, reserved capacity blocks and private AI environments — NVIDIA H100, H200, B200 and GB200/GB300 class — for training, fine-tuning and inference, worldwide. You contract with Castellan: we source the capacity from vetted third-party hardware owners and provide it to you under Swiss or EU contract law, as your single point of contact. You get the compute without building or running infrastructure.
Not every organisation that needs substantial GPU capacity should build a data centre — or hand its workloads to a hyperscaler under a foreign jurisdiction. We contract installed GPU capacity from vetted third-party hardware owners worldwide and provide it to you on clear terms. Castellan does not run a GPU cloud of its own: you contract with us, and we select the provider, structure the contract and coordinate delivery. Because the hardware already exists, you contract installed capacity instead of waiting for new build. The owners' side of this marketplace is Compute Monetization.
We work with AI companies, enterprises and public-sector institutions that need substantial GPU capacity without building infrastructure — under governing law and data-protection regimes their regulators and boards recognise.
Tell us your workload, scale and timeline. We come back with suitable capacity from vetted providers, availability and pricing under Swiss or EU contract law.