French AI infrastructure group Sesterce announced on Thursday that it plans to develop an AI data center campus in Finland costing more than €10 billion (about $11.2 billion) — one of the largest AI infrastructure commitments in Europe to date. The first phase alone is a 200-megawatt facility, and the company has already signed an anchor customer.
Why it matters: Europe’s AI buildout is racing to catch up with the US and China, and the Nordics — with cheap, green power and cool climates — are becoming the continent’s preferred AI factory floor.
Jämsä, Finland, October 8, 2026
What Sesterce announced
According to Sesterce’s statement, the project will be built in Jämsä, in central Finland, on the site of a former paper mill that closed in 2021. Construction on the first phase is planned to start in 2026, with a capacity of 200 megawatts. A second phase would expand the site to 600 MW.
Sesterce said it already has an anchor customer lined up for the project, though it did not name them. Over the longer term, the company aims to build more than 1 gigawatt of AI capacity in Finland, developing on existing industrial sites and scaling “in line with market demand.”
Why Finland — and why a paper mill
Finland is having a moment in the AI infrastructure race. The combination of abundant low-cost renewable power, cold air that reduces cooling costs, and a stable grid has drawn a steady stream of foreign technology investment into the Nordics — and Sesterce’s plan is the latest and among the largest.
The choice of a shuttered paper mill site is part of a broader pattern: Europe’s AI builders are repurposing legacy industrial sites that already have heavy grid connections, rather than waiting years for new power infrastructure. Sesterce, a French high-performance-computing and AI infrastructure operator founded in 2018, has been scaling aggressively at home too, with major GPU clusters and data center projects across France.
Why it matters
A single €10-billion-plus commitment says a lot about where Europe thinks AI capacity should live. The US buildout is dominated by hyperscalers and megacampus announcements in Texas, Indiana, and the desert Southwest. Europe can’t match those energy markets, but it can compete on sustainability and sovereignty — and Sesterce is betting that big customers, particularly those needing “sovereign” European AI infrastructure, will pay for capacity built on the continent rather than routed through US clouds.
The open question is the anchor customer. A named hyperscaler or a major European enterprise buyer would turn this from an ambitious plan into a committed build. Until Sesterce says who it is, treat the headline number as the ceiling, not the floor.
FAQ
How big is the Sesterce Finland project?
The full vision is more than 1 gigawatt of AI capacity in Finland, with a total investment above €10 billion (about $11.2 billion). Phase one is 200 MW, phase two takes it to 600 MW. For context, a standard large data center runs 100–200 MW — so this would rank among Europe’s largest AI campuses.
When does construction start?
Sesterce says works on the first phase are planned to start in 2026. No completion date has been disclosed.
Who is the anchor customer?
Sesterce has not named the anchor customer it says is already secured for the project.
Why is Finland attractive for AI data centers?
Cheap renewable electricity, naturally cold air that cuts cooling costs, strong grid infrastructure, and political stability. Nordic countries have been winning an outsized share of Europe’s AI data center investment for all of these reasons.
Is Sesterce a big player?
It’s one of Europe’s leading independent AI infrastructure operators, specializing in high-performance computing and GPU capacity. It has been expanding rapidly, including AI data center projects in France and a partnership with SoftBank on a large French AI campus.
Sources: Reuters