A London startup co-founded by a former Palantir executive has raised $50m to help governments and companies use American cloud and AI without letting America reach inside. The fear driving it stopped being hypothetical this year.

Valarian, a London-based sovereignty startup, has raised a $50m (£37m) Series A led by the US venture fund NEA, Fortune first reported. It is NEA’s first defence and dual-use investment in Europe, and it takes Valarian’s total funding to $70m.

The company sells one specific promise: keep using Amazon or Microsoft cloud, but stay in control of it.

A sealed room around your AI

Valarian’s software, called ACRA, sits underneath an organisation’s AI systems like a sealed operating room. Governments and businesses can run their workloads on American infrastructure, while Valarian’s layer decides exactly what data can leave, who can touch it, and who can switch it off.