Data centres / Operators / maincubes
maincubes data centre projects in Europe
Our European pipeline tracker follows 3 data-centre projects of 5 MW or more that maincubes develops or co-develops, in 1 country; 2 are permitted or already being built. All of them are in Germany.
67% are permitted or being built, against 43% across the whole tracker, so the pipeline is further along than the European average. The milestones we hold run from Aug 2025 to Sep 2026.
Projects by stage
- Announced1
- Under construction2
What the capacity figures measure
- IT load2
- Grid connection1
Stated size, where a figure is published
- Under 20 MW1
- 20 to 49 MW1
- 100 to 249 MW1
Bands mix the bases above (a grid connection is larger than the IT load it serves), so read them as orders of size. Capacities are counted, never added together.
Where maincubes is building
Projects by country, with the metro markets inside each country. Each name opens the market page.
Latest milestones
The newest 2 steps we recorded, with the market and the stage the project reached. Project names stay in our dataset.
- Sep 2026Frankfurt Announced
- Apr 2026Frankfurt Under construction
Method
The pipeline covers data-centre projects of 5 MW or more, or with no capacity published, that are announced, in planning, permitted or under construction and not yet fully operating. It is not a list of operating facilities, and it holds the projects we have found and checked, not every project a company has.
- We count the projects maincubes develops or co-develops; a joint venture counts once for each partner. Tenancies, land ownership, construction contracts and financing are not counted.
- Markets follow the tracker: a metro market includes the region around the city, and a national market covers the rest of the country.
- Stated capacities use different bases, so projects are counted by basis and in size bands and the figures are never added together.
- ScienceShot is independent of maincubes. The figures come from public filings and announcements, not from the company.
- This page shows aggregates. The pipeline tracker and the market pages hold the wider picture.
Cite as: ScienceShot, “maincubes data centre projects in Europe”, https://scienceshot.com/data-centres/operators/maincubes (checked 11 Oct 2026). © ScienceShot. You may quote individual facts with a link to this page.
ScienceShot calculation. How we build it: Method and standards.