Europe’s data center industry is entering a period of rapid expansion as AI adoption, cloud computing, and digital sovereignty reshape the region’s digital infrastructure landscape. According to Blackridge Research’s Global Data Center Market Report, Europe data center market is expected to reach EUR 176 billion between 2026 and 2031, while IT power demand across Europe is projected to grow at a 17% CAGR through 2031.

Europe hosts more than 3,400 data centers across the continent, making it one of the world’s largest digital infrastructure markets. The region also has around 88 AI-focused data centers with nearly 17.1 GW of known IT capacity spread across 24 countries.

Digital Realty, Equinix, OVHcloud, NorthC Datacenters, and Microsoft Azure rank among the largest European data center companies. Their investments continue to strengthen Europe’s digital infrastructure ecosystem across key hubs such as Frankfurt, London, Paris, Amsterdam, and Milan.

This article highlights the top 10 largest data center companies in Europe, examining their market presence, infrastructure scale, upcoming data center projects in Europe, and role in supporting the next generation of AI, cloud, and enterprise workloads across the region.

List of Top 10 Largest Data Center Companies in Europe 2026

Digital Realty (incl. Interxion)

Digital Realty operates one of Europe’s largest numbers of carrier-neutral data center platforms, following its USD 8.4 billion acquisition of Interxion in 2020. The company runs more than 104 data centers across Europe, largely under the “Interxion, a Digital Realty Company” brand.

The combined platform brings together Digital Realty’s large-scale wholesale facilities and Interxion’s highly connected retail colocation sites. This approach positions the company as a hybrid IT provider that supports both enterprise and hyperscale demand.

Digital Realty, one of the largest data center companies in the world, maintains a strong presence in Europe’s core metro markets, including Frankfurt, Paris, Amsterdam, Dublin, London, and Madrid. It also invests in strategic connectivity hubs such as Marseille, a key Mediterranean internet gateway, and Athens through its Lamda Hellix acquisition.

The company continues to expand its footprint with new developments in Paris, Madrid, and Brussels. Its facilities remain carrier- and cloud-neutral, providing low-latency access to major cloud platforms and more than 700 connectivity providers.

List of upcoming data center projects of Digital Realty in Europe:
 

Equinix

Colocation floor of WA2 in Warsaw, Poland ; Source: Equinix

Equinix operates 72 data centers across Europe, making it the region’s second-largest data center company. The company has established major connectivity hubs in London, Frankfurt, Paris, and Amsterdam, delivering low-latency access to leading cloud providers, telecom networks, and financial ecosystems. Its European footprint includes 14 data centers in the UK across London and Manchester, along with 15 facilities in Germany located in Frankfurt, Düsseldorf, Hamburg, and Munich.

The company also maintains key operations in France, where facilities in Paris and Bordeaux support connectivity between Europe, Africa, and the Middle East. In the Netherlands, Equinix operates AI-ready facilities in Amsterdam, while its Poland operations strengthen Eastern European connectivity through AI-optimized colocation infrastructure. 

Equinix focuses heavily on colocation and interconnection services, allowing enterprises to connect directly to platforms such as AWS, Microsoft Azure, and Google Cloud through high-performance networking ecosystems.

Equinix continues to invest in infrastructure designed for AI and high-density computing workloads. Its facilities support advanced cooling systems, redundant power infrastructure, and secure environments equipped with biometric scanners, mantrap systems, and multi-layer physical security controls. 

Sustainability also remains a key priority, with all UK facilities powered by 100% renewable energy as part of the company’s broader clean energy strategy.

Here is the list of upcoming data center projects of Equinix in Europe:

OVHcloud

OVHcloud is one of Europe’s leading cloud providers, operating more than 450,000 servers across 29 data centers in Europe and 46 facilities worldwide. The company maintains a strong presence in key European markets, including France, Germany, Poland, and the United Kingdom. Major data center hubs are located in Roubaix, Strasbourg, Gravelines, Paris, Frankfurt, Warsaw, and London, supporting enterprise, public sector, and cloud customers across the region.

The company focuses on high-performance and secure infrastructure built around its in-house water-cooling technology, which improves efficiency and supports high-density server deployments. OVHcloud offers dedicated servers, public cloud, and private cloud solutions while positioning itself as a major European alternative to US hyperscaler data center companies. 

Its infrastructure and services are designed to comply with GDPR requirements, helping customers maintain data sovereignty and keep sensitive data within Europe.

Here are the major data center announcements of OVH cloud in Europe:

NorthC Datacenters

NorthC Datacenters is a regional European data center operator with a strong presence in the Netherlands, Germany, and Switzerland. The company focuses on secure and sustainable colocation services while building regional connectivity alternatives outside the traditional FLAP-D ((Frankfurt, London, Amsterdam, Paris, and Dublin) markets. NorthC operates more than 10 locations across Europe, including major facilities in Amsterdam, Oude Meer, Nieuwegein, Aalsmeer, Eindhoven, Groningen, Düsseldorf, and Arlesheim near Basel.

The company provides colocation services ranging from single racks to dedicated private rooms and customized data suites. Its Region Connect Ring enables high-speed virtual interconnection between all NorthC facilities and major cloud providers, helping customers access scalable and low-latency connectivity across regions.

The company powers its facilities with 100% green energy and invests in waste heat reuse projects that support local energy networks. NorthC also develops infrastructure for high-performance computing and AI workloads, including support for high-density deployments and direct-to-chip liquid cooling technologies.

List of major upcoming data center projects in Europe by NorthC Datacenters:

Microsoft Azure

Microsoft Azure is rapidly expanding its European data center footprint and plans to operate more than 200 sites across 16 countries by 2027. The company is increasing its regional data center capacity by 40% over two years to support growing demand for AI, cloud computing, and enterprise workloads. Major operations are concentrated in markets such as the United Kingdom, France, and Germany, alongside continued expansion across other European regions.

The company continues to expand sovereign cloud offerings tailored to local regulatory requirements. In France, Microsoft partnered with Orange and Capgemini to launch Bleu, a sovereign cloud platform built around Microsoft Azure and Microsoft 365 services. In Germany, Delos Cloud, developed with SAP and Arvato Systems, targets public sector cloud requirements with sovereign infrastructure and compliance controls.

List of upcoming data center projects of Microsoft Azure:

NTT Global Data Centers

Frankfurt 4 Data Center; Source: NTT

NTT Global Data Centers operates a major carrier-neutral data center platform across Europe, focusing on secure colocation, hyperscale deployments, and interconnected infrastructure services. The company manages more than 22 data center sites across key European markets and provides over 200,000 square meters of IT space. Its facilities support enterprise, cloud, and AI data center workloads through high-density infrastructure, advanced cooling systems, and 24/7 operational support.

NTT has built a strong European presence through acquisitions such as e-shelter in Germany and Gyron in the United Kingdom. Germany remains one of its largest markets, led by major facilities including Frankfurt 1, one of Europe’s largest data centers, and Frankfurt 4. The company also operates significant facilities in London, alongside additional locations in Austria, Amsterdam, Madrid, and Switzerland.

The company offers flexible colocation data center services ranging from single racks to dedicated private suites. Its carrier-neutral facilities provide direct access to major internet exchanges such as DE-CIX in Frankfurt, along with connectivity to public and private cloud providers. NTT also delivers infrastructure engineering and remote support services while investing heavily in AI-ready environments. Its data centers support high-density deployments exceeding 70 kW per rack through technologies including Liquid Immersion Cooling and Direct Chip Liquid Cooling (DCLC).

List of upcoming data center projects of NTT Global Data Centers in Europe:

Vantage Data Centers

Vantage Data Centers operates 12 data centers across Europe, focusing on hyperscale campuses designed for cloud providers, AI deployments, and large enterprise workloads. The company has established a strong presence in major European data center markets, including Frankfurt and London, where demand for high-capacity and low-latency infrastructure continues to grow.

The company continues to expand its data center projects in Italy and the United Kingdom. In Italy, Vantage is developing the MXP2 campus near Milan, which will deliver 32 MW of IT capacity to support hyperscale and AI-driven demand. In the UK, the company is expanding through a second dedicated campus in London, strengthening its position in one of Europe’s largest colocation markets.

Vantage emphasizes sustainable and efficient campus design across its European operations. Its facilities use standardized and flexible infrastructure models that support rapid scaling while improving operational efficiency. The company also incorporates sustainability-focused features such as advanced cooling systems, energy-efficient operations, and landscape planning that includes native plant species at selected campuses.

The table below showcases the major upcoming data centers of Vantage Data Centers in Europe:

Arc Data Centers

Arc Data Centers operates 11 data centers across Europe, with the majority of its footprint concentrated in the United Kingdom. The company delivers more than 560 MW of capacity through high-security and modular facilities designed for government, enterprise, AI, and high-performance computing workloads. 

Major UK data center projects include Cody Park in Farnborough, Meridian Park in London, and Spring Park in Corsham, while new developments such as Union Park and Alliance Park are expanding its West London presence.

In Brussels, Ark is building a high-efficiency facility designed with Tier 3 resilience and low Power Usage Effectiveness (PUE) standards. These projects support the company’s strategy to expand beyond the UK while maintaining a focus on sustainable and secure infrastructure.

The company provides colocation services tailored to public sector and enterprise clients, including secure hosting through Crown Hosting, its joint venture with the UK Cabinet Office. Ark also designs facilities for high-density AI and machine learning workloads, including deployments supporting AI company Nebius.

List of upcoming data center projects of Arc Data Centers:

Telehouse (KDDI)

Source: Telehouse

Telehouse, a subsidiary of KDDI, operates 11 data centers across Europe and remains one of the region’s leading carrier-neutral colocation providers. The company has established major connectivity hubs in London, Paris, and Frankfurt, supporting enterprises, telecom operators, cloud providers, and financial institutions through highly connected infrastructure and managed services.

Telehouse London, located in the Docklands area, is one of the UK’s most important carrier-neutral data center campuses. Established in 1990, the campus includes four major facilities: North, East, West, and North Two. It also serves as the home of the London Internet Exchange (LINX), making it a critical interconnection point for digital traffic across Europe.

In France, Telehouse operates three facilities across the Greater Paris region and plays a major role in the France IX internet exchange ecosystem. In Germany, the company maintains a secure facility in Frankfurt, one of Europe’s leading financial and connectivity hubs. Across its European portfolio, Telehouse provides high-density colocation, cloud interconnection, managed services, and direct connectivity to major internet exchanges, including LINX, France IX, and DE-CIX, while maintaining uptime reliability of 99.99999%.

List of upcoming data center projects of Telehouse in Europe:

VIRTUS Data Centers (STT GDC platform)

VIRTUS Data Centers operates 11 data centers across Europe and is part of the STT GDC platform backed by Macquarie Asset Management. The company focuses on high-performance, scalable, and sustainable colocation infrastructure for hyperscale cloud providers, enterprises, government organizations, and AI-driven workloads. Its expansion strategy centers on major European digital hubs, including London, Berlin, and Milan.

London remains the company’s core market, where VIRTUS operates multiple interconnected carrier-neutral campuses and maintains a leading position in the region’s colocation sector. In Germany, the company is developing the VIRTUS Wustermark Campus near Berlin, a 204 MW project designed to become one of Europe’s largest and most sustainable data center campuses. In Italy, VIRTUS expanded into Milan through a new site in Cornaredo, Milan West, added in early 2025 to support growing digital infrastructure demand across Southern Europe.

The company provides colocation services designed for hyperscale, enterprise, and public sector customers while supporting high-performance computing and AI applications. Its facilities are built for high-density deployments and direct connectivity to major cloud providers, network carriers, and internet exchanges. 

Sustainability also plays a central role in the company’s strategy, with operations powered by 100% green energy and facilities designed to meet BREEAM Excellence standards.

List of upcoming data center projects of VIRTUS Data Centers in Europe:

Conclusion

Europe’s data center market is becoming one of the world’s most strategically important digital infrastructure sectors. AI-driven demand, sovereign cloud initiatives, and large-scale cloud adoption are pushing operators to expand beyond traditional FLAP-D markets into Southern Europe, the Nordics, and emerging regional hubs. Companies such as Digital Realty, Equinix, Microsoft Azure, OVHcloud, NTT, and others are investing heavily in hyperscale campuses, AI-ready infrastructure, and sustainable operations to meet rapidly growing demand.

The industry’s scale continues to accelerate. Europe’s data center sector is projected to contribute EUR 137.5 billion to GDP by 2031, up from EUR 53 billion in 2025, while annual scale colocation investment has already reached EUR 26 billion. Sustainability is also becoming central to expansion strategies, with 90% of energy consumed by European data centers now sourced from renewables and 55% of operators already meeting their 2030 water efficiency targets. 

Despite ongoing challenges related to grid capacity, land availability, and permitting, Europe’s largest data center companies remain at the center of the continent’s digital economy and future AI infrastructure growth.

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