Liquid cooling firm Submer has acquired a GPU-as-a-Service provider.

The company this week announced the acqusition of Radian Arc, a provider of an infrastructure-as-a-service (IaaS) platform for running sovereign, telco-focused GPU cloud services.

Terms were not shared.

Radian Arc’s platform is used by telecoms companies inside their networks to support cloud gaming and AI workloads. It is deployed across more than 70 telecom and Edge compute customers globally, with thousands of GPUs in operation. Submer said its combined footprint now spans North America, Europe, the UK, India, the Middle East, and Asia-Pacific.

Submer said the deal completes its full-stack cloud offering, combining with its recently-launched InferX AI cloud platform.

“This acquisition of Radian Arc completes our full-stack cloud infrastructure,” said Patrick Smets, CEO at Submer. “Bringing Radian Arc together with InferX, our AI operations and delivery platform, forms a dual-plane, sovereign, telco-focused cloud offering that is highly competitive in today’s AI data center market.”

Founded in 2015 by Daniel Pope and Pol Valls Soler, Submer has historically provided indoor and outdoor single-phase immersion cooling pods and larger-scale containerized pods. The company last year announced plans to move into developing data centers, followed by the launch of its InferX cloud platform.

David Cook, CEO at Radian Arc, added: “We have built our platform in close cooperation with our customers and partners, allowing us to develop a powerful model that demonstrably works at scale. By joining Submer’s established partner ecosystem, we are now in a position to accelerate delivery of sovereign AI infrastructure faster and with lower latency to telecoms operators worldwide.”

Radian Arc is a known user of AMD GPUs, but has also announced deployments involving Nvidia L40 and H200 GPUs.

Previous investors include gaming publisher Square Enix, AMD Ventures, Bitkraft Ventures, Boston, Blacknut Cloud Gaming, Saffelberg, CPS Capital Group, and TEC. The company raised $10 million in Series B funding in 2024, following a Series A round in 2022.