maincubes one

What maincubes one does

maincubes one is a European data center operator founded in 2012 and headquartered in Frankfurt, Germany. The company is privately held and majority-owned by DTCP (Deutsche Telekom Capital Partners). Its portfolio comprises four operational facilities — FRA01 (Frankfurt, 6 MW), FRA02 (Frankfurt, 8 MW, public-sector dedicated), BER01 (Berlin, 9 MW, public-sector dedicated), and AMS01 (Amsterdam, 5 MW) — together with a development pipeline that brings total capacity to roughly 400 MW, headlined by the BER02/mainHub Berlin campus (144-186 MW, expandable to ~400 MW, first phase Q1/2028), FRA03 (16 MW, 2026), FRA04 (40 MW, 2029), and FRA05 (75 MW, pipeline).

The core product is wholesale and hyperscale colocation: secured power, land, and building shell, delivered with carrier-neutral connectivity, ISO 27001 / ISO 50001 / BSI C5 / KRITIS compliance, and increasingly AI/HPC-ready technical specifications including direct-to-chip liquid cooling and high-density power configurations. Differentiated positioning is built on European data sovereignty, sustainability credentials (EcoVadis Silver 2024, Blauer Engel, TÜV Süd), and a capital base of €2.475B (debt facility, January 2026) to fund a multi-year buildout.

The business model is recurring colocation revenue under multi-year contracts, with a customer mix skewed toward hyperscale/cloud providers, public-sector tenants (notably in the two dedicated Berlin and Frankfurt facilities), and European enterprise colocation. Pricing follows industry-standard per-MW recurring economics. Two disclosed customers are Telefónica and TakeASP. Revenue is not publicly disclosed. Headcount sits in the 11-50 range and reportedly doubled in 2024, with leadership additions including a CDO (Thomas Wacker, February 2025) and CFO (Thomas Funke, April 2026) to scale financial and digital operations through the buildout phase.

Name

maincubes one

Legal name

maincubes Holding & Service GmbH

Website

https://maincubes.com

Company type

Private

Founded year

2012

Operating status

Operating

Headcount range

11–50 employees

Short description

maincubes is a Frankfurt-headquartered European data center operator founded in 2012, majority-owned by DTCP, running four operational facilities across Germany and the Netherlands (~28 MW) with a ~400 MW pipeline anchored by the BER02/mainHub Berlin AI/HPC campus, serving hyperscalers, public-sector clients, and European enterprises.

Ownership category

akta.pro rank

Product category

Data Center Services

NAICS

Computer Systems Design and Related Services (5415), Computer Systems Design and Related Services (54151)

akta.pro primary industry

HPC / AI-Optimized Data Center Facilities (HDABACAJ)

akta.pro secondary industries

Wholesale Colocation (Powered Shells / Suites) (HDABACAB), Enterprise Data Centers & On-Prem Facilities (Owned/Operated) (HDABACAG), Government / Defense & High-Security Data Centers (HDABACAK)

Keywords

• Hyperscale data centers
• Colocation services
• Carrier-neutral facilities
• AI-ready infrastructure
• Public sector hosting

Headquarters

HQ city

Frankfurt

HQ country

Germany

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Infrastructure, Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales

Revenue model

1. Colocation Services: Multi-tenant colocation services providing customers with secured rack space, power supply, cooling, and physical security in carrier-neutral data centers. Revenue generated from IT capacity rental measured in MW, with facilities serving hyperscalers, cloud providers, and enterprise customers.
2. Hyperscale & Build-to-Suit Solutions: Custom-built hyperscale data center solutions including 'Powered Shell' and 'Built-to-Suit' options. Long-term contracts with large hyperscale customers for dedicated facilities with capacities ranging from 16 MW to 200+ MW.
3. Public Sector Data Center Services: Dedicated data center services for government agencies and public institutions requiring high security, compliance, and data sovereignty. Facilities include BER01 and FRA02 for public sector use with specialized security certifications.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

maincubes operates a portfolio of carrier-neutral, high-security data center facilities across Frankfurt, Berlin, and Amsterdam, delivering colocation, hyperscale build-to-suit, and public sector data center services. The portfolio includes AI/HPC-ready facilities with direct-to-chip liquid cooling, 100% renewable energy supply, and waste heat recovery feeding district heating networks. Capacity offerings range from single-MW colocation to multi-phase hyperscale deployments up to 200+ MW.

Product overview

maincubes operates a portfolio of high-security data center facilities across three strategic European locations: Frankfurt, Berlin, and Amsterdam. The portfolio is organized into two main product lines: (1) Hyperscale Data Centers for AI and Cloud Providers, offering large-scale facilities with AI-ready infrastructure, liquid cooling, and flexible configurations from powered shell to built-to-suit; and (2) Public Sector Data Centers for government agencies and critical infrastructure organizations with maximum security and data sovereignty. The current operational facilities include FRA01 (6 MW colocation), FRA02 (8 MW public sector, EU Taxonomy aligned), BER01 (9 MW public sector, Blauer Engel certified), and AMS01 (5 MW OCP Ready colocation). Development projects include FRA03 (16 MW, expected 2026), FRA04 (40 MW, expected 2029), and BER02/mainHub Berlin (144-186 MW initial capacity, expandable to 400+ MW, expected 2028). Combined portfolio exceeds 400 MW across 7 locations. The company differentiates through sustainability (EU Taxonomy alignment, Blauer Engel, EcoVadis Silver), advanced cooling technologies (liquid cooling for AI/HPC), and waste heat recovery systems for district heating.

Differentiator

Problem solved

Functional benefit

Products and services

• Hyperscale Data Centers (AI and Cloud Provider) Large-scale data center facilities designed for hyperscale cloud providers, AI/GPU workloads, and HPC applications. Features include AI-ready infrastructure, direct liquid cooling options, and flexible configurations from powered shell to built-to-suit solutions. Capacity ranges from 16 MW to 200+ MW.
• Public Sector Data Centers High-security, compliant data center environments specifically designed for government agencies, public institutions, and organizations with critical infrastructure (KRITIS) requirements. Features include maximum physical security, certified processes, complete data sovereignty, and ISO 27001, SOC2, and TÜV certifications.
• FRA01 Colocation data center in Frankfurt city center operational since 2017. Provides 6 MW capacity with 100% availability, optimal connectivity, and energy efficiency.
• FRA02 Public sector data center in Frankfurt operational since 2024. Provides 8 MW capacity (N+1) with highest operational flexibility, innovative cooling technology, and full EU Taxonomy compliance.
• FRA03 Hyperscale data center under construction in Schwalbach am Taunus (Frankfurt region) with 16 MW IT capacity. Features carrier-neutral, technology-independent, AI-ready design with maximum flexibility and liquid cooling.
• FRA04 Hyperscale and HPC data center planned in Frankfurt with 40 MW capacity. Features secured power supply, AI Ready and AI/HPC ready cooling options.
• BER01 Public sector data center in Berlin operational since 2025. Provides 9 MW capacity (N+1) with TÜV and ISO certifications, 100% availability, Blauer Engel certification, and full EU Taxonomy compliance. Features waste heat reuse for adjacent GoWest campus.
• BER02 (mainHub Berlin) Hyperscale campus in development in Nauen, Berlin region. Planned capacity of 144-186 MW with potential expansion to 400+ MW. Features 110kV substation, AI/HPC ready cooling, LEED Gold target design, and waste heat utilization for local heating networks.
• AMS01 Colocation data center in Amsterdam operational since 2018. Provides 5 MW capacity with OCP Ready certification, 100% SLA availability, PUE ≤1.6, and support for up to 20 kW per rack. Houses the European OCP Experience Center.

Quantifiable outcome

• PUE ≤1.2 achieved at hyperscale facilities
• +6 more outcomes

Named customers2 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration20 records

AI capability3 records

Feature5 records

Partnerships

Six partnerships are on record, tiered core.

• E.DIScoreTechnology or Integration · 4 August 2025E.DIS is the regional utility provider that signed the 200 MW grid connection agreement with maincubes for the Nauen campus. The partnership ensures secured power supply for BER02 and future expansion, with connection scheduled for 2027.
• City of NauencoreStrategic or Co-development Partner · 2 July 2025The city of Nauen collaborated with maincubes on the zoning plan and permitting process for the mainHub Berlin campus. The rapid and coordinated planning process was completed in close cooperation, creating planning certainty for the development phases.
• SÜWAG GroupcoreTechnology or Integration · 12 June 2025SÜWAG operates the district heating network for the city of Schwalbach. maincubes signed a waste heat utilization agreement with SÜWAG to feed waste heat from FRA03 into the local heating network, with maincubes providing land for heat pump installation.
• NorthshorecoreTechnology or Integration · 13 January 2025Northshore, a specialist in data center sustainability assessments, verified that maincubes' FRA02 data center meets EU Taxonomy criteria for energy efficiency and emissions management.
• Stadtwerke GöttingencoreTechnology or Integration · 29 February 2024Stadtwerke Göttingen signed a Power Purchase Agreement (PPA) with maincubes to supply 34 MW of solar power to the FRA03 data center in Schwalbach. This long-term renewable energy partnership supports maincubes' commitment to 100% green electricity operations.
• EY, XU, DCD AcademycoreStrategic or Co-development Partner · 1 January 2024maincubes partnered with EY, XU, and DCD Academy to develop and rollout new ESG learning programs for employees as part of its sustainability strategy and Sustainability-Linked Loan commitments.

Scale indicators6 records

Recent moves10 records

Expansion highlights6 records

Broad incumbents

• Equinix: Global retail colocation and interconnection leader with significant presence in Frankfurt (FR4–FR8) and Amsterdam (AM1–AM5). Directly comparable as a multi-tenant colocation operator serving enterprises, hyperscalers and network carriers, though much larger and more geographically diversified.
• Digital Realty: Global hyperscale and colocation operator with major Frankfurt and Amsterdam campuses (including Interxion heritage). Directly comparable as a wholesale/hyperscale and retail colocation provider serving the same AI/cloud customer set in the FLAP-D region.
• CyrusOne: Global hyperscale and enterprise data center provider, owned by KKR/Global Infrastructure Partners, with European expansion including Frankfurt and Amsterdam. Comparable as a hyperscale lease operator serving AI/cloud tenants, though US-centric in origin.

Direct peers

• NTT Data (e-shelter / Gyron / Netmagic): Operates one of Europe's largest data center platforms through e-shelter (Frankfurt/Berlin) and other European brands. Highly comparable as a German-rooted hyperscale and colocation operator with similar Frankfurt and Berlin footprints and a public-sector / regulated-industry customer base.
• Vantage Data Centers: Hyperscale-focused data center operator with major European campuses in Frankfurt, Berlin and beyond. Directly comparable business model of large build-to-suit and powered-shell leases for cloud and AI customers, with similar sustainability and AI-ready positioning.
• Stack Infrastructure: Hyperscale-focused data center developer with growing European footprint (including Frankfurt). Comparable as a powered-shell / built-to-suit operator targeting the same large cloud and AI customers, with similar ESG and liquid-cooling positioning.

Emerging players

• Iron Mountain Data Centers: Growing colocation and hyperscale platform in Europe (including Frankfurt and Amsterdam), offering carrier-neutral facilities with strong compliance positioning. Comparable as a multi-tenant operator targeting regulated and enterprise workloads, though with a different geographic centre of gravity.
• Compass Datacenters: US-rooted but expanding hyperscale data center developer with a modular build approach. Comparable in business model (large-scale, multi-tenant powered-shell and build-to-suit for hyperscalers), though currently less European-centric.

Regional players

• Telehouse (KDDI): Carrier-neutral colocation operator within the KDDI group with strong European presence including Paris, London and Frankfurt. Comparable as a multi-tenant colocation and interconnection provider, though broader in carrier-neutral enterprise focus than hyperscale.
• GDS Holdings: Asia-Pacific-focused hyperscale and retail data center operator (China, Southeast Asia, with emerging Europe footprint via DayOne). Comparable as a hyperscale and AI-ready operator pursuing a similar lease-and-build model, though primarily Asia-based.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/maincubes
• Xx.com/maincubes

Compliance14 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Funding overview

Funding rounds2 records

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about maincubes one