Oneidea discovers UK-based companies that are both established or entering the new era of Artificial Intelligence, offering a wide range of services from UK soil. Oneidea’s parent, Varadius, leads this discovery and assessment work with a single goal in mind: to expose the best of the UK’s AI offerings for companies seeking services and to ignite potential partnerships.
If a company has been directly interviewed/spoken to by Varadius, and sufficient reassurances have been met on their UK standing and technology offerings, the company achieves the Varadius Verified badge (click to understand what this means in more detail).
cosine.sh
The Sovereign AI Lab. Trains AI models and specialised coding agents for organisations that need frontier capability within secure environments. Public cloud, managed single-tenant, and fully air-gapped deployments. Clients include BT, HSBC, Lloyds, Leonardo, QinetiQ, and Vodafone. London-based.
hostcomm.co.uk/solutions/uk-sovereign-ai
UK-sovereign open-source LLM inference API running entirely in AWS London (eu-west-2). GDPR and PCI DSS Level 1 compliant. Trading since 2004.
doubleword.ai
Inference cloud for high-volume async and batch LLM workloads. OpenAI-compatible API serving open-weight models (DeepSeek, Qwen, Llama, Mistral). SOC 2 and ISO 27001. London-based, company no. 13353288.
stonesthro.co.uk
UK-sovereign AI-ready microedge cloud with 15,800+ distributed sites across the UK Critical National Infrastructure estate. GPU-as-a-service, IaaS/PaaS, Kubernetes. Partnered with Cornerstone and Zadara. NVIDIA GPU-optimised platforms.
platformdc.io
Modular AI data centres for generative, agentic and physical AI. Solves scalability and efficiency challenges of delivering AI infrastructure. High-performance, sustainable, deployable anywhere. Warrington, UK.
white.space
Sovereign AI operating system for defence and national security. ISO 27001 certified with zero non-conformities. Collective platform deploys across cloud, on-premise, edge, and air-gapped systems. Full auditability, policy-driven governance, no external data sharing. 65+ staff, Belfast HQ. Series A backed.
argylldata.ai
Agentic workflow inference on UK-sovereign RDU hardware. OpenAI-compatible API. Up to 10× faster and 90% lower cost than GPU alternatives.
civo.com/uk-sovereign-cloud
UK-sovereign cloud with 100% UK-based infrastructure. Data stays under UK law. NVIDIA B200 GPUs, open standards, no lock-in.
s-ai.com
Purpose-built for government, defence, and national security. First-class AI capabilities delivered from sovereign infrastructure. GDPR & UK GDPR compliant.
