Bare-metal GPU clusters, reserved capacity blocks, and managed private AI environments — H100, H200, B200 and GB200/GB300 class — delivered from Castellan's network of partner systems and data centres under Swiss and European jurisdiction. Contract the compute; skip the build.
Not every organisation that needs serious compute should build a data centre — or surrender its workloads to a hyperscaler in a foreign jurisdiction. Castellan's compute services put contracted, sovereign-aligned GPU capacity between those two extremes. The capacity is real and installed today: it comes from our monetization network — owners of GPU systems who contract their headroom through Castellan — which is why it is available now and priced sharply.
We contract with AI companies, enterprises, and public-sector institutions that need serious 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'll come back with cluster options, availability, and pricing under Swiss or EU contract law.