Castellan does not start from zero. It draws on a decade of experience at the Bitkern Group — developing and running energy-intensive compute infrastructure in Switzerland, Austria and the United States — and starts with access to the one resource that decides every AI project before the first rack arrives: power.
The Bitkern Group has spent a decade at the demanding end of the compute business — crypto-mining and high-performance data centres: securing power, building high-density facilities and operating them commercially, around the clock, in Switzerland, Austria and the United States. Many of today's AI-infrastructure operators came out of the same discipline.
Over that decade the group has built and operated more than 300 MW of energy-intensive compute capacity — negotiating multi-year power supply, engineering high-density electrical and cooling systems, and running facilities where every hour of downtime carries a price. That is a different education from the real-estate playbook most data-centre entrants arrive with. It teaches what breaks at scale, what a grid operator will actually commit to, and what a megawatt really costs across a full market cycle.
It also built the network that gives Castellan access to more than 5 GW of power, available as demand requires, together with established energy-supply and procurement relationships. The hardest part of an AI campus is not constructing the building — it is securing abundant, affordable, interconnected power. That is why Powered Land sits at the base of everything we offer.
Most AI-infrastructure entrants start from zero on power. Castellan starts with access already in place.
These are not aspirations on a slide. They are disciplines proven over a decade at the Bitkern Group — from energy sourcing to GPU Procurement & Trading and HPC Hosting — and brought into Castellan by the people who practised them, together with their supplier network.
Castellan was founded to apply this experience to a new task: developing, building and leasing AI data centres at campus scale, as set out in our vision. What it draws from the Bitkern Group is concrete — four advantages that usually take a decade to build, available from day one.
Two companies, deliberately separate. Bitkern continues to run its own business, unchanged. Castellan is an independent Swiss company that acquires and develops its own sites — greenfield locations selected and purpose-built for AI, to data-centre standards. No mining facility is converted into an AI campus; the two asset bases do not mix. What Castellan draws from Bitkern is expertise, the supplier and site network — including locations that are unsuitable for mining but well suited to AI — and part of the team.
The result: when Castellan signs its first lease, it does so with power access in hand, a supply chain that has already delivered, and a team that has commissioned and operated this class of infrastructure before. That is the difference between a development story and an operating company.
A decade of operations, more than 300 MW delivered and access to more than 5 GW of power — now applied to data centres for AI. Talk to the team, or see our two delivery models: powered shell and turnkey.