Valarian raises £37 million in a Series A funding round led by New Enterprise Associates — marking NEA’s first defence and dual-use technology investment in Europe — to build sovereign AI infrastructure for UK government, defence, and enterprise clients. The London-based startup, founded by Max Buchan and Josh McLaughlin, has developed ACRA: a control layer that sits beneath critical AI applications to enforce security, data sovereignty, and governance in high-consequence operations.
Key Highlights
- £37 million ($50 million) raised in Series A (July 2026)
- $70 million total raised to date
- Lead investor: NEA — its first European defence/dual-use investment
- Founders: Max Buchan and Josh McLaughlin
- Core product: ACRA sovereign AI infrastructure control layer
- Customers: UK government, defence, enterprise
- Headquarters: London, United Kingdom
Company Overview
Valarian was founded on a recognition that the UK and its allies face a governance gap in artificial intelligence: as AI systems are deployed in high-consequence environments — military operations, critical national infrastructure, government decision-making — there is no existing control layer that enforces security and data sovereignty at the infrastructure level. Most AI governance tools operate at the application layer and can be circumvented by the underlying infrastructure. Valarian’s ACRA platform operates beneath critical applications, so security and sovereignty policies are enforced regardless of what runs on top.
Founders
Valarian was co-founded by Max Buchan and Josh McLaughlin, who identified the AI sovereignty gap as one of the most critical and underserved problems in national security technology. Their focus on high-consequence operations — environments where AI errors or security breaches have irreversible consequences — places Valarian at the most demanding end of the enterprise AI market.
Funding Details
The Series A was led by New Enterprise Associates (NEA), one of the world’s largest venture capital firms with over $25 billion under management. This is NEA’s first investment in a European defence and dual-use technology company. Additional participants included Lightbank, XTX Ventures, Sequel, Litquidity VC, and angel investors Gokul Rajaram and Nikesh Arora. The round brings total funding to $70 million (£52 million).
The ACRA Platform
ACRA is Valarian’s sovereign infrastructure layer for high-consequence AI operations. It enforces security and data sovereignty policies at the infrastructure level — ensuring sensitive government and defence data cannot leave controlled environments, AI systems only access authorised data, and every action in high-consequence settings is logged, auditable, and reversible. For UK government departments operating under OFFICIAL-SENSITIVE or SECRET classifications, ACRA provides an AI infrastructure layer meeting stringent UK government security frameworks without relying on US or Chinese hyperscalers.
Market Opportunity
Sovereign AI infrastructure is emerging as one of the most significant technology investment categories of the late 2020s. Governments across Europe, the Middle East, and Asia are urgently building domestic AI infrastructure independent of US or Chinese hyperscalers — driven by geopolitical concern and data protection requirements. The UK’s NCSC, GCHQ, and Ministry of Defence have all signalled the need for domestic sovereign AI. Valarian’s ACRA addresses this directly at the infrastructure level, positioning it as a potential foundational component of the UK’s sovereign AI stack.
Why This Funding Matters
NEA choosing Valarian as its first European defence and dual-use investment reflects growing transatlantic recognition that the UK is producing world-class defence technology companies. As the UK government increases technology procurement ambitions and reduces dependence on overseas cloud providers for sensitive workloads, companies like Valarian are positioned to become critical national technology assets.
Future Roadmap
With £37 million secured, Valarian will accelerate ACRA rollout across UK government and defence clients, expand its engineering and security teams, and pursue additional government framework agreements. NATO allies and Five Eyes partners are expected to be international expansion targets given the shared security architecture across the alliance.
Conclusion
Valarian raises £37 million to build the sovereign AI infrastructure layer that UK government and defence operations require. With NEA’s backing, a genuinely infrastructure-level approach in ACRA, and total funding of £52 million, Valarian is one of the most important defence technology companies emerging from the UK in 2026. Follow BestStartup UK for the latest UK startup funding news and technology breakthroughs.
FAQ
How much did Valarian raise?
Valarian raised £37 million ($50 million) in a Series A led by NEA, bringing total funding to $70 million (£52 million).
What is Valarian’s ACRA platform?
ACRA is a sovereign infrastructure control layer that sits beneath critical AI applications to enforce security and data sovereignty for UK government, defence, and enterprise in high-consequence environments.
Who founded Valarian?
Valarian was co-founded by Max Buchan and Josh McLaughlin to address the governance gap in high-consequence AI operations.
Why is NEA’s investment significant?
This is NEA’s first European defence and dual-use investment — a major signal of US institutional confidence in UK sovereign technology companies.
Who does Valarian serve?
UK government departments, defence agencies, and enterprises requiring sovereign AI infrastructure that meets stringent data sovereignty requirements not available from US or Chinese hyperscalers.
