The data center industry is now experiencing its biggest expansion in history.
Driven primarily by AI, global data center electricity consumption is projected to reach 945 terawatt-hours (TWh) annually by 2030, nearly double today’s level and equivalent to almost 3% of worldwide electricity demand. [1]
Capacity is expanding just as rapidly. Industry analysts expect global data center capacity to reach 200 gigawatts (GW) by 2030. The hyperscale data center market alone is projected to exceed $600 billion by 2030. [2][3]
Behind this enormous expansion are a relatively small group of companies that dominate the industry. Some own and operate hyperscale cloud platforms serving millions of customers worldwide, while others specialize in colocation services, carrier-neutral facilities, edge computing, or wholesale data center leasing.
In this article, I feature the world’s largest data center companies, examining their operating capacity, financial scale, technology leadership, and competitive advantages.
Note: This article covers companies that build data centers for businesses to lease, not cloud providers like Amazon Web Services, Microsoft Azure, or Google Cloud.
Did you know?The global AI data center market is projected to reach $2 trillion by 2032, growing at an impressive 27.5% CAGR. [4]
Table of Contents
14. Switch
Founded in 2000Headquarters: Nevada, US
Number of Data Centers: 17 (operational)
Total Capacity: 445 MW (operational)
Competitive Edge: Latest EVO AI Factory architecture
Switch is one of America’s most innovative privately owned data center companies. It introduced the concept of SUPERNAP — a highly resilient, hyperscale data center campus engineered for cloud computing, enterprise workloads and extreme power density.
Switch campuses emphasize modular construction, advanced cooling systems, patented electrical infrastructure, and exceptionally high rack densities. Long before the AI boom, these facilities were engineered to support hybrid air-and-liquid cooling, enabling deployments that are now well suited for modern GPU clusters.
The company currently operates more than 16 PRIME campuses across the US and continues to expand aggressively in response to AI-driven demand.
Its latest EVO AI Factory design is capable of delivering more than 2 MW per cabinet, among the highest-density designs announced in the industry.
13. CoreSite
Founded in 2001 (as CRG West)Headquarters: Colorado, US
Total Customers: 1,350+
Number of Data Centers: 30
Total Capacity: 220 MW+
Competitive Edge: Backed by American Tower
CoreSite is best known for building highly interconnected digital ecosystems where enterprises, network operators, cloud providers, and content companies exchange traffic with extremely low latency.
The company operates 30 data centers across 11 strategic US markets, connected through its proprietary Open Cloud Exchange (OCX) platform. The platform simplifies hybrid cloud deployment while lowering network costs and improving application performance.
CoreSite stands out for its connectivity rather than its size. It serves more than 1,350 enterprise, cloud, network, and service provider customers and supports 44,000+ physical and virtual interconnections between businesses.
12. Colt Data Centre
Headquarters: London, UK
Total Customers: 2,000+
Number of Data Centers: 27 (operational & under development)
Total Capacity: 500 MW+
Competitive Edge: Most sustainable hyperscale facilities
Colt Data Centre Services (Colt DCS) is one of Europe’s fastest-growing hyperscale colocation providers. It specializes in large wholesale deployments where customers often occupy entire data halls or buildings.
Colt’s current portfolio includes 15 operational data centers and 12 additional facilities under development across Europe and Asia-Pacific. Once completed, its total capacity will reach 1 GW.
The company is committed to sustainable infrastructure. Every new facility follows Colt’s Global Reference Design (GRD), a standardized engineering blueprint that emphasizes low-embodied-carbon materials, renewable electricity, near-zero-water-consumption cooling systems, and highly efficient operations.
Plus, Colt targets an annualized Power Usage Effectiveness (PUE) below 1.2 for new developments, placing it among the industry’s most energy-efficient operators. [5]
11. Centersquare
Founded in 2024Headquarters: Texas, US
Total Customers: 2,000+
Number of Data Centers: 80
Total Capacity: 500 MW+
Competitive Edge: Premium metro locations
Although Centersquare is a newly launched brand, it inherited decades of operational experience through the merger of two established companies: Evoque Data Center Solutions and Cyxtera Technologies’ assets.
It primarily serves enterprise IT workloads, hybrid cloud deployments, financial institutions, healthcare organizations, and managed service providers.
Its carrier-neutral architecture enables customers to choose from more than 200 network and technology providers, allowing flexible connectivity to public cloud platforms, telecom carriers, and business partners.
One of CenterSquare’s defining strengths is its concentration in high-value metropolitan markets. Its facilities are strategically located in Northern Virginia, Silicon Valley, Chicago, Dallas, New York, Seattle, Boston, Toronto, and London. [6]
Centersquare currently supports over 2,000 enterprise customers across 3.5 million square feet of data center space and more than 500 MW of critical power capacity.
10. Iron Mountain Data Centers
Headquarters: Massachusetts, US
Number of Data Centers: 30+
Total Capacity: 1.4 GW
Competitive Edge: Industry-leading security and compliance
Iron Mountain is one of the oldest companies in the digital infrastructure industry, having been founded in 1951 as a secure records storage business. For decades, it specialized in protecting physical documents, media, and sensitive corporate information before expanding into digital records management, cloud services, cybersecurity, and eventually hyperscale data centers.
This heritage makes it particularly attractive to customers operating in highly regulated industries such as financial services, healthcare, pharmaceuticals, government, and legal services.
Its data center platform combines enterprise-grade colocation with strict physical security, compliance certifications, and hybrid IT services, allowing customers to consolidate both digital and physical information management under a single provider.
Iron Mountain has 30+ data centers spanning 6 million square feet with over 1.4 GW of power capacity. It plans to add 400 MW of AI-ready capacity by 2028.
9. GDS Holdings
Founded in 2001Headquarters: Shanghai, China
Number of Data Centers: 100+
Total Capacity: 1 GW+
Competitive Edge: China’s largest carrier-neutral operator
GDS Holdings is China’s leading carrier-neutral hyperscale data center operator. It develops and operates high-performance facilities concentrated around China’s largest economic and internet hubs.
It operates more than 100 high-performance data centers, strategically located around Beijing, Shanghai, Shenzhen, Guangzhou, Chengdu, and other major economic centers where demand for cloud computing and AI infrastructure is strongest.
In 2025, GDS delivered one of its strongest financial results, with revenue rising 10.8% to $1.63 billion and net income reaching $137.2 million. [7]
Looking ahead, the company expects AI to maintain its primary growth catalyst. It continues investing in large, high-density campuses featuring advanced power systems, efficient cooling technologies, and scalable infrastructure capable of supporting next-generation AI workloads.
8. CyrusOne
Headquarters: Texas, US
Total Customers: 1,000+
Number of Data Centers: 60+
Total Capacity: 1 GW+
Competitive Edge: AI-optimized infrastructure
CyrusOne builds and operates AI-ready digital infrastructure for hyperscale cloud providers, Fortune 1000 enterprises, and government organizations, with a growing presence across North America, Europe, and Asia-Pacific.
The company focuses on large-footprint, hyperscale deployments. It has developed its Intelliscale platform, which is engineered specifically for AI and other high-density computing workloads.
Its customers typically lease entire data halls or complete facilities capable of supporting tens of megawatts of IT load.
In 2026, Calpine signed a new 380 MW power agreement for a CyrusOne campus adjacent to the Freestone Energy Center in Texas. The agreement also includes an exclusive arrangement for a second 380 MW phase.
Combined with an earlier 400 MW agreement at the Thad Hill Energy Center, CyrusOne has now secured more than 1.1 GW of contracted power in Texas — one of the largest power commitments announced by any colocation provider. [8]
7. STACK Infrastructure
Founded in 2019Headquarters: Colorado, US
Number of Data Centers: 130+
Total Capacity: 2.5 GW+
Competitive Edge: Build-to-Suit hyperscale expertise
STACK Infrastructure is one of the world’s fastest-growing hyperscale colocation providers, specializing in build-to-suit AI campuses for hyperscale cloud companies.
Instead of traditional retail colocation, STACK develops large-scale campuses with flexible power and infrastructure for cloud, AI, and high-performance computing workloads.
It stands out by offering powered land as well as completed data centers, helping customers build custom facilities faster by avoiding delays in securing land, power, and permits.
The company operates 27 operational data centers across 10 North American markets, while its broader global platform spans more than 130 facilities in 34+ markets through operational assets and development projects.
6. DataBank
Headquarters: Texas, US
Total Customers: 2,500+
Number of Data Centers: 75+
Total Capacity: 1 GW+ (operational plus planned)
Competitive Edge: Balanced customer portfolio
DataBank operates 76 data centers in 29+ metropolitan markets, making it one of the largest privately owned colocation providers in the United States.
Unlike hyperscale-focused companies, DataBank serves a balanced mix of enterprise customers, cloud providers, healthcare organizations, financial institutions, government agencies, and AI companies. This diversified customer base provides stable recurring revenue.
AI has significantly accelerated DataBank’s growth strategy. The company currently operates more than 500 MW of deployed capacity while developing an additional 850MW+ expansion pipeline.
Also, DataBank has expanded rapidly through acquisitions, integrating companies like zColo, LightBound, C7 Data Centers, and EdgePresence into a unified national platform. This strategy has accelerated geographic expansion while increasing available capacity and service offerings. [9]
As of today, DataBank serves more than 2,500 enterprise customers across North America.
5. Vantage Data Centers
Founded in 2010Headquarters: Colorado, US
Campuses: 40+
Total Capacity: 3 GW+
Competitive Edge: Massive AI-ready campuses
Vantage focuses almost exclusively on developing large-scale hyperscale campuses for cloud providers, AI companies, and multinational enterprises.
AI demand has made Vantage one of the biggest beneficiaries of the global data center boom. The company now has more than 3 GW of operational and committed capacity, with another 3+ GW in development for future delivery.
Unlike many competitors, Vantage designs campuses ranging from 64 MW to more than 1 GW, allowing customers to expand without relocating infrastructure.
Plus, Vantage has strong financial backing from leading global infrastructure investors, including DigitalBridge, Silver Lake, PSP Investments, GIC, AustralianSuper, and ADIA.
4. QTS Data Centers
Founded in 2003Headquarters: Kansas, US
Enterprise Customers: 1,100+
Number of Data Centers: 110+ (operational & upcoming)
Competitive Edge: Backed by Blackstone’s financial strength
QTS (Quality Technology Services) is one of the fastest-growing hyperscale data center companies in the world. Backed by Blackstone, it has rapidly expanded from a regional US operator into a global AI infrastructure platform with more than 2 GW of capacity.
The company operates 75 data centers across over 35 strategic markets in North America and Europe, serving hyperscale cloud providers, Fortune 1000 companies, government agencies, and AI developers.
In recent years, QTS has rapidly expanded its AI infrastructure. In 2026, the company announced plans to raise $4.6 billion through investment-grade green bonds and other financing to build new hyperscale data center campuses. [10]
3. NTT Global Data Centers
Headquarters: Tokyo, Japan
Number of Data Centers: 160+
Total Capacity: 2 GW+
Competitive Edge: Strong presence in Asia-Pacific
NTT Global Data Centers is the dedicated data center division of Japan’s telecommunications giant NTT Group. It operates over 160 data centers across 20+ countries, making it the third-largest colocation provider globally.
Unlike many rivals that primarily focus on enterprise colocation, NTT has built a balanced portfolio spanning enterprise customers, hyperscale cloud providers, AI developers, financial institutions, telecommunications companies, and government organizations.
The company currently operates more than 2 GW of data center capacity worldwide and plans to expand it to nearly 4 GW in the coming years and over 5 GW within five years. Its AI infrastructure is already among the industry’s largest, with more than 200 MW of deployed AI load. [11]
Alongside expansion, NTT is also strengthening its sustainability initiatives. According to its 2025 Sustainability Report, the company sourced 51% of its global non-IT electricity from renewable energy and secured about 1.7 TWh of renewable power through power purchase agreements. [12]
2. Digital Realty
Digital Realty data center in Ontario, Canada
Headquarters: Texas, US
Total Customers: 6,000+
Number of Data Centers: 300+
Total Capacity: 3 GW+
Competitive Edge: Leadership in hyperscale data centers
Digital Realty is the world’s largest wholesale colocation provider and one of the largest owners of carrier-neutral data centers. It operates more than 300 data centers across 50+ metropolitan markets in 25+ countries.
The company delivers massive deployments ranging from private enterprise suites to campuses exceeding 100 MW for hyperscale cloud providers and AI developers. As of today, it has an estimated 3 GW of operational IT capacity.
One of Digital Realty’s major strengths is its PlatformDIGITAL architecture, which integrates colocation, interconnection, cloud connectivity, and data exchange services into a unified platform.
In 2026, the company announced a $3.5 billion transaction with Blackstone to increase its ownership in three hyperscale data centers in Northern Virginia, the world’s largest data center market. [13]
1. Equinix
Headquarters: California, US
Total Customers: 10,500+
Number of Data Centers: 280+
Total Capacity: 3 GW+
Competitive Edge: Largest interconnection ecosystem
Equinix is the global leader in carrier-neutral colocation and digital infrastructure. Rather than simply renting server space, it has built digital ecosystems that allow thousands of organizations to exchange data with minimal latency and exceptional reliability.
More specifically, it supports 513,000 interconnections, allowing enterprises to directly connect to business partners, cloud providers, financial exchanges, telecom carriers, and SaaS platforms inside the same facilities. This reduces latency and improves security while lowering networking costs.
Equinix operates 280 International Business Exchange (IBX) data centers across 77 metropolitan markets in 36 countries. It serves more than 10,500 customers, including 2,000+ network service providers and 4,500+ cloud and IT service providers. [14]
Financially, Equinix has become one of the world’s most valuable data center REITs. In FY 2026, the company generated $9.53 billion, with recurring colocation revenue accounting for about $6.5 billion and interconnection services contributing $1.6 billion. [15]
Read More
- 13 Largest Data Centers In The World [By Size]
- 13 Best Data Science Companies Worldwide
- 5 Different Types Of Data Center [With Examples]
- Energy demand from AI, IEA
- Global data center sector to nearly double to 200GW, JLL
- Hyperscale data center market, MarketsandMarkets
- AI data center market and trend analysis, MarketsandMarkets
- The details on data centre sustainability, Colt DCS
- CenterSquare acquires Metropolitan Infill Portfolio in Dallas, CenterSquare
- GDS Holdings reports Q4 and full-year results, Yahoo Finance
- Over 1100 MW under contract for CyrusOne data centers in Texas, CyrusOne
- DataBank secured $1.45 billion of financing for expansion, DataBank
- QTS Data Centers looks to raise $4.6 billion, Data Centre Dynamics
- NTT Global Data Centers plans to double capacity in AI Boom, Bloomberg
- The 2025 global sustainability report on data centers, NTT Data
- Digital Realty buys Blackstone’s Virginia data center stake for $3.5 billion, Reuters
- Equinix outlines AI, power, climate, and growth risks, Stock Titan
- Equinix revenue throughout the years, Macrotrends
