maincubes
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maincubes is a German-owned, Frankfurt-headquartered data center operator that sells colocation space — racks, cages, and private suites — to enterprise, public-sector, cloud and AI customers across a growing network of facilities in Germany and the Netherlands. As of 2026 the company operates or is building sites in the Frankfurt area (FRA01–FRA04), Berlin/Brandenburg (BER01, BER02), and Amsterdam (AMS01), with a stated total portfolio exceeding 400 MW of IT capacity once current construction completes, positioning it as one of Germany’s fastest-growing colocation providers. Founded in 2012 and majority-owned since 2023 by Digital Transformation Capital Partners (DTCP), maincubes distinguishes itself with a strong emphasis on European data sovereignty, sustainability (targeting PUE ≤1.2 and waste-heat reuse), and a pivot toward hyperscale/HPC and AI-ready capacity — exemplified by its Schwalbach (FRA03) and Dietzenbach (FRA04) developments and a large Nauen, Brandenburg campus (BER02) planned at up to 186 MW.
maincubes has a confirmed data center presence at the following locations:
FACILITY OPERATOR
Phone: +49 151 550 218 91
maincubes Data Center Locations
- Berlin, Berlin, Germany BER01 PENDING REVIEW
BER01 is a government-leased facility offering 9 MW of N+1 capacity, part of maincubes' expansion into the Berlin market as a gateway to Eastern Europe. - Nauen, Brandenburg, Germany BER02AI DATA CENTER PENDING REVIEW
maincubes broke ground on BER02 in March 2026, a new multi-building campus on a 14-hectare site near Berliner Straße planned to deliver 144–186 MW of hyperscale and HPC capacity. - Dietzenbach, Hesse, Germany FRA04AI DATA CENTER CARRIER-NEUTRAL PENDING REVIEW
Scheduled to be operational by 2027, FRA04 is designed for hyperscale, HPC, and AI workloads with 40 MW of IT capacity and 60 MW of committed power, making it maincubes' largest development to date. - Frankfurt am Main, Hesse, Germany FRA02 PENDING REVIEW
FRA02 launched in April 2024 with part of the site pre-leased to an unnamed public-sector IT client, offering roughly 4,700 sqm of IT white space. - Offenbach am Main, Hesse, Germany FRA01 PENDING REVIEW
Keppel DC REIT acquired this facility in 2015 while it was still under construction, and it sits roughly 800 metres from DE-CIX, one of the world's leading internet exchange points. - Schwalbach am Taunus, Hesse, Germany FRA03AI DATA CENTER PENDING REVIEW
Built on a campus previously owned by Samsung, FRA03 is due to launch by summer 2026 with 16 MW of IT capacity, liquid cooling, and waste-heat reuse feeding the local district heating network. - Amsterdam, Netherlands AMS01AI DATA CENTER PENDING REVIEW
AMS01 is OCP Ready™ certified and marketed as designed for maximum power density, positioning it as a premier colocation destination in the Netherlands.
By Continent
AI Data Centers
maincubes is developing several facilities explicitly targeted at AI and high-performance computing tenants rather than traditional colocation only. FRA04 in Dietzenbach, slated for 2027, is described as designed for hyperscale, HPC, and AI environments with 40 MW of IT capacity and 60 MW of committed power — the company's largest project to date. FRA03 in Schwalbach am Taunus, due in 2026, will support liquid cooling and reuse its waste heat locally, while the newly-started BER02 campus in Nauen, Brandenburg is planned to scale up to 144–186 MW of hyperscale/HPC capacity.
- Schwalbach am Taunus, Germany FRA03 AI DATA CENTER PENDING REVIEW
Built on a campus previously owned by Samsung, FRA03 is due to launch by summer 2026 with 16 MW of IT capacity, liquid cooling, and waste-heat reuse feeding the local district heating network. - Dietzenbach, Germany FRA04 AI DATA CENTER CARRIER-NEUTRALPENDING REVIEW
Scheduled to be operational by 2027, FRA04 is designed for hyperscale, HPC, and AI workloads with 40 MW of IT capacity and 60 MW of committed power, making it maincubes' largest development to date. - Nauen, Germany BER02 AI DATA CENTER PENDING REVIEW
maincubes broke ground on BER02 in March 2026, a new multi-building campus on a 14-hectare site near Berliner Straße planned to deliver 144–186 MW of hyperscale and HPC capacity. - Amsterdam, Netherlands AMS01 AI DATA CENTER PENDING REVIEW
AMS01 is OCP Ready™ certified and marketed as designed for maximum power density, positioning it as a premier colocation destination in the Netherlands.
Common Questions
Does maincubes offer infrastructure specifically built for AI or GPU workloads?
Yes. maincubes markets several of its newer developments — FRA03 in Schwalbach am Taunus, FRA04 in Dietzenbach, and BER02 in Nauen, Brandenburg — explicitly as "Hyperscale & HPC" facilities designed for AI and high-performance computing, with FRA04 alone offering 40 MW of IT capacity and 60 MW of committed power, and BER02 planned to reach 144–186 MW.
Where does maincubes operate data centers?
As of 2026, maincubes has facilities in the Frankfurt region (Offenbach, Frankfurt, Schwalbach am Taunus, and Dietzenbach, all in Hesse, Germany), in and around Berlin (Berlin city and Nauen, Brandenburg), and in Amsterdam, Netherlands.
Who owns maincubes?
maincubes has been majority-owned by Digital Transformation Capital Partners (DTCP) since September 2023, after previously being linked to Germany's Zech Group/Art-Invest.
Is maincubes a colocation provider or a cloud provider?
maincubes' core, purchasable product is colocation — customers rent rack, cage, or private-suite space in its data centers — though it also positions some capacity for hyperscale cloud and AI tenants.
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