Valarian raises $50M from NEA to wrap sovereignty around US clouds

A London startup called Valarian just closed a $50 million Series A led by NEA, and the pitch is worth pausing on because it reframes the sovereign AI argument. According to Fortune's reporting, Valarian is not trying to build a rival to AWS or Azure. It is selling a software layer, called ACRA, that sits on top of those clouds and controls what data leaves an AI workload, who touches it, and when. Total funding is now around $70 million, and Fortune notes this is NEA's first defense and dual-use bet in Europe.

The framing from co-founder and CEO Max Buchan is the interesting part. "Sovereignty can't be a settings toggle inside someone else's infrastructure," he told Fortune. "It has to be the infrastructure itself." That is a strong line, and it lands because he pairs it with a real incident. When the Trump administration restricted Anthropic's international access, Buchan's account is blunt: "No one could use their model anymore, because the president of another country had shut it off." That is the concrete fear Valarian is selling into, alongside the older worry about the US CLOUD Act reaching data held by American providers abroad.

The co-founder alongside Buchan is Josh McLaughlin, a former managing director at Palantir, which matters because government-facing enterprise sales is a specific muscle and Palantir alumni have it. NEA's Mustafa Neemuchwala put it plainly to Fortune, contrasting Valarian with hardware-heavy defense startups: "If this company fails, it's not going to be because they overspent on a production facility."

The honest caveat is that a control layer sitting on top of AWS or Microsoft is still, ultimately, sitting on top of AWS or Microsoft, and the reporting does not walk through how ACRA would actually hold up if a US court served a subpoena on the hyperscaler underneath. Fortune also does not name the specific government customers, the deployment scale, or how the $70 million total breaks down across rounds, so the commercial traction is still a black box.

The forward-looking read is that Valarian is a bet on regulated European buyers wanting a middle path: keep the hyperscaler capacity, buy a sovereignty control plane on top, avoid the pain of a full exit. If that middle path is real, NEA gets an early anchor in a category the big US clouds will eventually try to build themselves.