Europe's Sovereign Cloud Still Runs on American Silicon

A piece making the rounds on Hacker News this week lays out an uncomfortable arithmetic for European policymakers. The bloc has spent years pushing sovereign cloud initiatives, from Gaia-X to national champions like OVHcloud and Deutsche Telekom's T-Systems, to reduce dependence on AWS, Microsoft Azure, and Google Cloud. But the servers humming inside those sovereign data centers run on Intel Xeons, AMD Epycs, and Nvidia GPUs. The software stack may be European. The silicon is not.

That gap is not academic. US export controls already reach deep into the chip supply chain, governing what Nvidia can sell to whom and under what conditions. If Washington decided tomorrow to restrict advanced server CPUs or accelerators to a European country, or to a specific European customer, no amount of locally hosted data would compensate. The compute would simply stop being available at parity with what American firms can buy.

There are partial European answers. SiPearl is building Arm-based server chips for the EuroHPC supercomputing program. Imec in Belgium remains one of the most important semiconductor research institutes in the world. ASML in the Netherlands makes the lithography machines that every leading-edge fab on earth depends on, including TSMC's. But none of this adds up to a vertically integrated European chip industry capable of supplying hyperscale AI infrastructure. The leading-edge logic still gets fabbed in Taiwan, and the designs still come overwhelmingly from US companies.

Key points

• European sovereign cloud projects have focused on software, data residency, and ownership structure
• The underlying server CPUs and AI accelerators come almost entirely from US firms
• US export controls already shape what advanced chips can ship to which countries
• ASML is the major exception, a European chokehold on EUV lithography
• Building a sovereign chip stack would take a decade and tens of billions of euros

The political appeal of sovereign cloud has always been partly symbolic. It lets governments tell citizens that their health records and tax data are not subject to the US CLOUD Act, even though enforcement of that promise is murky when the hyperscalers operate local subsidiaries. Adding processor sovereignty to the requirements would push the project from difficult to nearly impossible on any near-term timeline.

The more honest framing is that digital sovereignty is a spectrum, not a binary. A European cloud built on American chips is more independent than a US cloud running American chips, but it is not the autonomous infrastructure the political rhetoric implies. Brussels can choose to accept that, or it can fund a chip industry on the scale of the Chips Act and wait fifteen years. There is no shortcut, and the longer the gap between rhetoric and reality persists, the more the sovereign cloud label looks like marketing rather than policy.