Civo and Era4 are partnering on a sovereign AI cloud solution in the UK.

The two will develop a full-stack AI offering for UK organizations, combining Era4’s data center network and Civo’s CivoStack software.

Era4 was founded as Carbon3.ai in June 2025, rebranding earlier this year. According to the company, it currently has around 50MW of power capacity in the UK from low-carbon energy, and a “clear pathway” to more than 500MW of hybrid power.

Mark Boost, CEO at Civo, said: “Sovereignty without developer accessibility is a bottleneck, and accessibility without green power is unsustainable. By deploying Civo’s cloud architecture natively inside Era4’s localized data centers, we are giving the UK Sovereign AI Fund, regional accelerators, and enterprise innovators exactly what they’ve been waiting for: a true, top-tier alternative to the US hyperscalers that runs entirely on automated, domestic, and sustainable foundations.”

Karl Havard, chief commercial officer at Era4, added: “The UK desperately needs to increase its sovereign AI infrastructure footprint. We are now deploying a solution the UK can truly call its own. The partnership enables the deployment of CivoStack on our lower-carbon network of data centers, transforming raw silicon into an instantly consumable, Kubernetes-enabled powerhouse. This isn’t a reseller arrangement; it’s two British champions co-building the future of sustainable national infrastructure.”

The platform will use Nvidia HGX B300 AI chips.

Era4 previously launched a sovereign AI platform in September 2025 in partnership with HPE, Vast Data, and WWT to develop what it calls the “national grid for AI,” aiming to deploy a nationwide mesh of data centers powered by off-grid renewable energy. That platform was said to be based on HPE Private Cloud AI.

Era4, since its founding, has pursued several data center projects. The company claims to already have more than 40 brownfield and industrial sites in its portfolio across England, Scotland, Wales, and Northern Ireland.

Earlier this month the company filed to develop a data center at the Shelford Farm Estate on Broad Oak Road in Canterbury.

Era4 also has projects planned in Derbyshire and Newport, and recently saw a proposal for a site in Anglesey rejected.

The company has links to Valencia, sharing executives. Valencia Energy is part of the Valencia Waste group, one of the UK’s largest landfill operators. The company has seven active landfills and more than a dozen closed sites. Era4 and Valencia have previously announced a partnership to deploy data center capacity at Valencia landfill sites, utilizing gas.