Valarian raises $50M for ACRA sovereign infrastructure

Valarian, a UK-based sovereign infrastructure company, announced it has closed a $50 million Series A round to expand ACRA, its Kubernetes-based control layer for governing AI models, agents and other workloads. The financing was announced Tuesday and was led by New Enterprise Associates (NEA), with participation from Lightbank, XTX Markets, Sequel, LitVC and angel investors Gokul Rajaram and Nikesh Arora. Valarian said the funds will support geographic expansion, product development and deployments into regulated and government environments.

ACRA is designed to run on top of Kubernetes and to enforce governance for workloads running inside an organisation’s environment. Each workload is launched inside its own enclave and subject to a dedicated policy stack that covers workload identity, user identity, default-deny network segmentation, policy enforcement, short-lived secrets, scoped messaging permissions and audit logging. The company says those controls let operators restrict what a model or agent can access and trace actions for compliance and incident response.

The platform is cloud-agnostic and can operate on public cloud providers, in on-premises data centers or inside fully air-gapped networks. Customers keep their own encryption keys so Valarian has no access to deployments after they go live. Valarian also provides runtime controls intended to isolate, seal or revoke misbehaving or compromised workloads without taking down neighbouring services. The architecture is built to integrate with existing applications rather than require them to be rewritten.

Valarian offers two deployment tracks. Valarian Enterprise is aimed at regulated industries that need strict controls and auditability. Valarian Defence targets government and military customers that require higher isolation and sovereignty requirements. Both tracks use the same underlying control layer but reflect different compliance and operational needs.

Max Buchan, co-founder and chief executive, said: “The intelligence layer of Western institutions is consolidating: quietly, contract by contract, department by department, into systems those institutions do not control. We built Valarian because sovereignty isn’t a feature you can add later. It’s architecture you have to build from the ground up.”

The company said the new funding will accelerate engineering work on policy enforcement, secrets management and auditing features and will also expand customer support and sales teams for regulated-sector and defence deployments. Valarian did not disclose its valuation or the names of customers in the announcement. The Series A follows a $20 million seed round and is intended to scale operations as demand for runtime governance and data sovereignty tools grows among enterprises and public-sector organisations.