Why Europe’s Best AI Talent Still Leaves for America

Walk into almost any frontier AI lab in San Francisco and you’ll hear European accents everywhere. A lot of the people training the world’s most advanced models grew up in Paris, Berlin, Warsaw or London, then packed up and moved west. For business leaders trying to hire and keep technical talent, that pattern is hard to ignore.

The numbers back it up. Atomico’s 2025 State of European Tech report found that net tech talent inflows to Europe dropped from around 52,000 in 2022 to just 26,000 in 2024. Pay is a big reason. An analysis in the journal Intereconomics put US-based AI roles at 30% to 70% more than the same job in Europe.

You might assume recent US policy changes would slow all this down, and on paper they probably should. But the pull towards America runs deeper than any single rule, and there’s a lot to unpack about why the best people keep going.

What the New US Rules Actually Changed

Uncharted Territory

In September 2025, a presidential proclamation brought in a $100,000 supplemental fee on certain new H-1B petitions, aimed at workers being hired from outside the US.

The fee is being challenged in court by the US Chamber of Commerce, a coalition of labour groups and employers, and twenty state attorneys general. A D.C. district court upheld it in December 2025, but the appeal is still working its way through the system.

Tighter Enforcement

Around the same time, the Department of Labor launched Project Firewall, an enforcement drive targeting employers who misuse the H-1B programme.

For the first time, the Secretary of Labor can personally approve investigations into companies suspected of underpaying H-1B workers, displacing American staff, or filing fraudulent paperwork. By November 2025, the DOL had at least 175 open investigations and had identified $15 million in unpaid back wages.

New international student enrolment at US universities also fell by 17% in the autumn of 2025, with visa delays and application backlogs cited as the main cause. On the surface, all of this looks like a door swinging shut.

The Visa Routes That Skip the Lottery

Top researchers and founders rarely depend on the H-1B at all. Many of them qualify for the O-1A, the visa for people with extraordinary ability in their field. There’s no annual cap and no lottery, so the timing doesn’t come down to luck.

The O-1A has specific requirements, and it’s worth understanding them early. Most serious candidates start by checking the O-1A visa criteria to see where they stand.

You need to meet at least three of eight standards covering things like awards, published work, high pay and original contributions to your field, and a strong AI researcher with citations, conference talks and a senior role at a known lab will often tick several without much trouble.

That one difference changes the whole calculation. A researcher can apply when they’re ready, work for more than one employer through an agent, and use the same track record later to apply for a green card. None of that depends on a sponsoring company winning a draw.

The Money and the Labs Still Win

Pay is the obvious draw, but it’s the shape of the pay that matters. US offers often come loaded with equity, and at a fast-growing AI company that equity can end up worth far more than the salary itself. European packages rarely stretch that far.

Then there’s the work. The biggest frontier labs, the deepest pools of venture money and the most ambitious research budgets still sit in the US. If you want to build the largest models with serious compute behind you, that’s mostly where the jobs are.

How Employers Can Compete for AI Hires

European companies aren’t powerless here. The gap has narrowed, with better funding, more senior roles and a growing cluster of serious AI firms in London, Paris and Berlin. Atomico’s own data shows most European AI founders now choose to stay put.

For employers, the lesson is simple. If you want to keep your best people, you compete on the things you can actually control: meaningful equity, real ownership of important work, and a clear sense of where someone’s career is going. Salary on its own won’t hold anyone who has good options on both sides of the Atlantic.

The Pull Is Stronger Than the Friction

The brain drain isn’t slowing down because America made itself harder to reach. The people most likely to leave are exactly the ones who can use the routes these new rules don’t touch.

For business leaders, the honest answer is that you won’t win on visa friction or by hoping policy keeps talent at home. You’ll win by offering work and rewards good enough that staying is clearly the better bet.