New tracking data from ABI Research reveals the top data center companies in the United States by active IT load in 2025. This study aims to help data center operators and enterprises assess their competitors, identify potential partners, and plan capacity expansions.
America’s digital backbone is expanding at lightning speed. Behind every cloud platform, Artificial Intelligence (AI) model, and enterprise application lies a growing network of data center operators competing for scale and power.
According to ABI Research, there are 2,396 data centers operational in the United States as of 2025. Collectively, the active Information Technology (IT) load reached 17.2 Gigawatts (GW) for the year. Hyperscalers and colocation providers hold near parity capacity across the U.S. market. Neocloud and sovereign cloud operators trail behind, but are seeing their customer bases broaden as organizations seek specialized AI compute partners.
Built using our proprietary infrastructure database, this ranking lists the top 25 largest data center companies in the United States by active IT capacity. In the AI era, power capacity is a critical indicator of market leadership.
Key Takeaways
- Power capacity defines market leadership in 2025. Active IT load, not just site count, is the clearest indicator of scale in the AI era. The top data center operators control a disproportionate share of the United States’ 17.2 GW of active capacity.
- Hyperscalers and colocation providers are near parity. Tier One cloud providers like Amazon Web Services (AWS), Meta, and Microsoft lead individually, but colocation firms such as Equinix, QTS, and Digital Realty collectively rival hyperscale capacity.
- AI and High-Performance Computing (HPC) are reshaping infrastructure design. New builds prioritize Graphics Processing Unit (GPU) density, liquid cooling, custom silicon, and long-term power commitments to support sustained AI workloads.
- Neocloud and crypto-native players are pivoting to AI. Companies like CoreWeave, Hut 8, and Cipher Mining are transitioning from niche or mining roots toward large-scale AI infrastructure partnerships.
- Capital access and utility partnerships are competitive advantages. The fastest-growing operators are those securing multi-gigawatt pipelines, land, and long-term energy agreements to future-proof expansion.
Table 1: Top 25 Data Center Companies in the United States by Active IT Capacity
(Source: ABI Research)
| Rank | Company | U.S. Data Centers | 2025 U.S. Active IT Capacity | Operator Type |
|---|---|---|---|---|
| 1 | Amazon Web Services (AWS) | 105 | 2.3 GW | Hyperscale Tier One |
| 2 | Meta | 63 | 1.5 GW | Hyperscale Tier One |
| 3 | Microsoft Azure | 55 | 1.2 GW | Hyperscale Tier One |
| 4 | Equinix | 91 | 995 MW | Colocation |
| 5 | QTS | 33 | 811 MW | Colocation |
| 6 | Digital Realty | 83 | 686 MW | Colocation |
| 7 | CyrusOne | 43 | 674 MW | Colocation |
| 8 | Aligned | 15 | 548 MW | Hyperscale Tier Two |
| 9 | DataBank | 74 | 544 MW | Colocation |
| 10 | Google Cloud | 22 | 508 MW | Hyperscale Tier One |
| 11 | Oracle | 28 | 470 MW | Hyperscale Tier One |
| 12 | Switch | 18 | 445 MW | Colocation |
| 13 | STACK Infrastructure | 35 | 410 MW | Hyperscale Tier Two |
| 14 | CoreSite | 31 | 331 MW | Colocation |
| 15 | NTT Global Data Centers | 70 | 322 MW | Colocation |
| 16 | Vantage Data Centers | 20 | 314 MW | Hyperscale Developer |
| 17 | CloudHQ | 7 | 260 MW | Hyperscale Tier Two |
| 18 | Hut 8 | 7 | 240 MW | Neocloud |
| 19 | Iron Mountain | 18 | 233 MW | Colocation |
| 20 | Cipher Mining | 5 | 231 MW | Hyperscale Tier Two |
| 21 | Centersquare | 55 | 229 MW | Colocation |
| 22 | Flexential | 39 | 228 MW | Colocation |
| 23 | CoreWeave | 14 | 212 MW | Neocloud / Hyperscaler |
| 24 | Sabey Data Centers | 20 | 210 MW | Colocation |
| 25 | TierPoint | 39 | 183 MW | Colocation |
1. Amazon Web Services (AWS)
Number of U.S. Data Centers: 105
U.S. Active IT Capacity in 2025: 2.3 GW
Operator Type: Hyperscale Tier One
AWS operates the largest portfolio of data centers globally and in the United States. Notable AWS data center regions include Northern Virginia, Ohio, Northern California, and Oregon. Its hyperscale campuses underpin enterprise cloud adoption across virtually every industry. In recent years, AI and HPC have influenced how new AWS data centers are designed, particularly around power density and custom silicon integration. AWS now builds for sustained, compute-intensive workloads, which is a pivot from short-term cloud elasticity alone.
After adding a historic 3.8 GW of capacity in 2025, AWS shows no signs of slowing down. It’s investing US$50 billion to build more than 1 GW of AI and supercomputing capacity for the U.S. government. It’s also constructing new cloud infrastructure in Indiana, North Carolina, Mississippi, Ohio, and Texas. These new IT capacity additions are on top of an already vast data center network across North America.
2. Meta
Number of U.S. Data Centers: 63
U.S. Active IT Capacity in 2025: 1.5 GW
Operator Type: Hyperscale Tier One
Like AWS, Meta’s U.S. data centers increasingly reflect its AI/HPC-first strategy. Facilities are engineered for dense GPU deployments that power internal AI research and generative model development. These data centers are optimized for Meta’s own long-term compute requirements, serving internal needs over external cloud customers. Energy efficiency and renewable sourcing remain central to its infrastructure roadmap.
Meta is currently constructing a US$10 billion, 1 GW data center in Lebanon, Indiana, as an extension to the company’s AI infrastructure build-out.
3. Microsoft Azure
Number of U.S. Data Centers: 55
U.S. Active IT Capacity in 2025: 1.2 GW
Operator Type: Hyperscale Tier One
Microsoft Azure maintains a broad national network of data centers supporting enterprise, government, and regulated workloads. The rise of Gen AI has driven additional investment in GPU-heavy environments within select campuses. Hybrid cloud capabilities continue to differentiate Azure, especially among customers that require integration between on-premises systems and public cloud infrastructure.
Microsoft is investing over US$80 billion in its next-generation “AI superfactory” network in 2026, with the United States as a top region. The company plans to launch the East US 3 region in Atlanta by early 2027. It has also received approval to construct 15 new data centers in Mount Pleasant, Wisconsin. The new AI infrastructure will reportedly run on liquid-cooled NVIDIA Blackwell GPUs.
4. Equinix
Number of U.S. Data Centers: 91
U.S. Active IT Capacity in 2025: 995 Megawatts (MW)
Operator Type: Colocation
Equinix operates one of the most interconnected data center platforms in the country. Its facilities act as neutral colocation hubs where enterprises (e.g., retailers), cloud providers, and network operators converge. Equinix builds value through ecosystem density, de-emphasizing the need to compete on hyperscaler ownership.
In February 2026, Equinix announced an increase in expected annual revenue compared to original forecasts. Substantial AI-driven demand was a key motivation for the adjustment.
5. QTS
Number of U.S. Data Centers: 33
U.S. Active IT Capacity in 2025: 811 MW
Operator Type: Colocation
QTS has built a reputation around large-scale campus development. Its data centers are designed to accommodate hyperscale tenants that require significant contiguous power and expansion options. Strategic land acquisition and utility partnerships form the backbone of its growth strategy.
The company is currently building a US$10 billion data center campus in Cedar Rapids, Iowa (the state’s largest investment ever). Other facilities will be constructed in Eagle County, Utah, and New Albany, Ohio.
6. Digital Realty
Number of U.S. Data Centers: 83
U.S. Active IT Capacity in 2025: 686 MW
Operator Type: Colocation
Digital Realty operates a broad portfolio of U.S. data centers serving enterprise, cloud, and hyperscale customers. Through its PlatformDIGITAL strategy, the company emphasizes distributed infrastructure and data proximity. Many deployments support hybrid cloud architectures that span multiple regions.
Digital Realty is aggressively expanding its AI-ready footprint through major land acquisitions in Chicago, while securing a US$373 million supply deal with Schneider Electric to bypass infrastructure bottlenecks. The company recently reported record annual bookings of US$1.2 billion, fueled by high demand for its new quantum-AI and high-capacity networking partnerships with Lumen.
7. CyrusOne
Number of U.S. Data Centers: 43
U.S. Active IT Capacity in 2025: 674 MW
Operator Type: Colocation
CyrusOne focuses on large-footprint data center developments in high-demand markets. Enterprise and hyperscale tenants value its disciplined execution and long-term capacity planning. Private ownership has allowed the operator to prioritize infrastructure durability over short-cycle returns. Its facilities increasingly cater to cloud providers that require substantial power commitments in a single location.
CyrusOne plans to expand its Texas data center footprint with a 760 MW campus in Freestone County. The company also works closely with energy supplier Calpine to secure land, power, and grid connectivity.
8. Aligned
Number of U.S. Data Centers: 15
U.S. Active IT Capacity in 2025: 548 MW
Operator Type: Hyperscale Tier Two
Aligned has differentiated itself through cooling innovation inside its data centers. Adaptive airflow systems allow customers to scale power density without a full mechanical redesign. That flexibility appeals to cloud and AI tenants deploying compute-intensive hardware. While its footprint is smaller than some industry peers, technical design remains a defining advantage.
NVIDIA, Microsoft, and BlackRock announced a US$40 billion acquisition deal of Aligned in October 2025. The deal is expected to close in 1H 2026.
9. DataBank
Number of U.S. Data Centers: 74
U.S. Active IT Capacity in 2025: 544 MW
Operator Type: Colocation
DataBank operates one of the most geographically distributed data center portfolios in the country. Its presence across secondary and regional markets gives enterprises access to localized infrastructure beyond traditional hyperscale hubs. Managed services and hybrid cloud capabilities complement its colocation offering. With edge deployments growing in prevalence, that distributed model becomes increasingly beneficial for customer acquisition.
In May 2025, DataBank opened a new AI-ready data center in Orangeburg, New York. The company is also developing a 480 MW, 292-acre data center campus in Red Oak, Texas, and a 192 MW campus in Culpeper, Virginia.
10. Google Cloud
Number of U.S. Data Centers: 22
U.S. Active IT Capacity in 2025: 508 MW
Operator Type: Hyperscale Tier One
Google’s U.S. data centers exhibit an engineering-driven philosophy. Custom silicon and vertically-integrated AI systems shape infrastructure design. Google’s data center campuses are built to handle sustained Machine Learning (ML) workloads at scale. Even with fewer sites than some competitors, compute intensity per data center continues to rise as AI becomes central to Google’s cloud strategy.
Google lags behind the other big hyperscalers, but recent announcements suggest a huge ramp-up in data center construction in the United States. Chief among them includes a US$40 billion AI data center investment in Texas through 2027, a US$9 billion investment in Virginia for 2026, and capacity expansion into the South/Midwest.
11. Oracle
Number of U.S. Data Centers: 28
U.S. Active IT Capacity in 2025: 470 MW
Operator Type: Hyperscaler Tier One
Oracle Cloud Infrastructure (OCI) has expanded steadily across the United States, targeting enterprise and regulated industries. OCI data centers emphasize predictable performance and dedicated environments. Select campuses are increasingly provisioned for AI workloads tied to database modernization and enterprise analytics. The company positions itself as a performance-focused alternative within the broader cloud market.
To meet soaring demand for AI-ready compute from OpenAI, NVIDIA, Meta, and other high-profile customers, Oracle plans to raise up to US$50 billion in debt and equity. Moreover, the company is a notable player in the US$500 billion Stargate Project.
12. Switch
Number of U.S. Data Centers: 18
U.S. Active IT Capacity in 2025: 445 MW
Operator Type: Colocation
Switch develops large-scale data center campuses with a strong emphasis on energy efficiency and sustainability. Its facilities serve enterprise and cloud tenants requiring secure environments and enduring power stability. Campus design and renewable energy sourcing are central to its operating philosophy.
Switch is advancing its “AI Factories” strategy with major U.S. expansions, including a 176-acre acquisition in North Las Vegas and new projects in Atlanta and Austin. To fund growth, the company has raised over US$3.5 billion since 2024 and signed a US$1.9 billion agreement with Schneider Electric to power high-density AI deployments.
13. STACK Infrastructure
Number of U.S. Data Centers: 35
U.S. Active IT Capacity in 2025: 410 MW
Operator Type: Hyperscale Tier Two
STACK Infrastructure focuses on developing data centers tailored to hyperscale cloud clients. Its strategy revolves around scalable campuses in high-growth U.S. markets. By focusing on land acquisition and utility alignment, STACK provides expansion pathways for tenants seeking large-capacity commitments.
Backed by over US$6 billion in green financing since May 2025, the company is adding 121 MW in Oregon, launching a 1 GW campus in Virginia, and evaluating new large-scale developments in Louisiana.
14. CoreSite
Number of U.S. Data Centers: 31
U.S. Active IT Capacity in 2025: 331 MW
Operator Type: Colocation
CoreSite has carved out a strong position in dense, urban data center markets where connectivity matters as much as capacity. Its facilities are deeply integrated into major metro ecosystems, giving enterprises direct access to leading cloud platforms and network providers. Case in point, CoreSite operates edge cloud deployments in downtown New York City and downtown Chicago. Further IT capacity expansion was added across New York City in 2025, and similar additions are expected in Denver and Santa Clara, California.
15. NTT Global Data Centers
Number of U.S. Data Centers: 70
U.S. Active IT Capacity in 2025: 322 MW
Operator Type: Colocation
NTT brings a global perspective to its U.S. data center footprint. Backed by one of the world’s largest telecommunications groups, its facilities are part of a broader digital infrastructure portfolio that spans network services and enterprise IT. Customers seeking international reach often value the ability to align U.S. deployments with global operations under a single provider. That integration sets NTT apart from purely domestic colocation operators.
With US$10 billion in investment through 2027, NTT will add 130 MW of IT capacity to its data center infrastructure across Chicago, Dallas, Phoenix, and Virginia. These facilities are designed to run high-density AI/ML workloads.
16. Vantage Data Centers
Number of U.S. Data Centers: 20
U.S. Active IT Capacity in 2025: 314 MW
Operator Type: Hyperscale Developer
Vantage focuses on large campus developments built specifically for hyperscale cloud customers. This differs from some other data center companies that operate smaller urban interconnection hubs. Access to land, power, and utility partnerships underpins its business model.
Vantage is expanding rapidly across North America, backed by a US$9.2 billion equity investment led by DigitalBridge and Silver Lake. The company is also a key partner in Project Stargate, with plans to add GWs worth of IT capacity for OpenAI and Oracle in Texas and Wisconsin.
17. CloudHQ
Number of U.S. Data Centers: 7
U.S. Active IT Capacity in 2025: 260 MW
Operator Type: Hyperscale Tier Two
CloudHQ operates with a clear mandate: build wholesale data centers for major cloud providers. Its portfolio is concentrated but substantial in power density, epitomizing its focus on large, single-tenant environments. Site selection typically revolves around strong fiber routes and dependable energy access. CloudHQ aligns closely with hyperscale cloud expansion, leaving the pursuit of a broad enterprise base to other data center operators.
At full build-out, CloudHQ’s LC campus in Ashburn, Virginia, is planned to deliver over 1.7 GW of IT load. Another multi-building campus is under development in nearby Culpeper. It’s designed for up to 2.1 million square feet of space and support for 142 MW to 215 MW of IT capacity. While Virginia is CloudHQ’s main data center hub, it also operates facilities in Minnesota, Illinois, Texas, and California.
18. Hut 8
Number of U.S. Data Centers: 7
U.S. Active IT Capacity in 2025: 240 MW
Operator Type: Neocloud
Hut 8’s infrastructure roots lie in digital asset mining, and that background shapes its data center design philosophy. Facilities are engineered for energy-intensive workloads where efficiency and cost control are decisive. While cryptocurrency remains crucial to its Go-to-Market (GTM) strategy, the company has explored AI/HPC capacity in response to growing demand.
As part of Hut 8’s shift to large-scale AI infrastructure, the company signed a 15-year, US$7 billion lease with Fluidstack; it will host Anthropic’s AI models at a new River Bend campus in Louisiana. Initial data halls are scheduled to come online in 2027. In recent news, Hut 8’s 3Q 2025 earnings report shows that the firm has more than 8.6 GW of data center capacity in development across four sites.
19. Iron Mountain
Number of U.S. Data Centers: 18
U.S. Active IT Capacity in 2025: 233 MW
Operator Type: Colocation
Iron Mountain entered the data center market from a foundation in secure information storage and records management. That heritage continues to influence its digital infrastructure strategy. Customers often associate the brand with physical security, compliance rigor, and operational reliability. In highly regulated industries, that reputation can matter as much as scale.
Iron Mountain is shifting aggressively toward becoming a high-growth data center Real Estate Investment Trust (REIT). Underscoring this trend are major expansions in Virginia and Miami, as well as continued investment in AI-ready infrastructure and power capacity. The company reported record results in its 4Q 2025 earnings call, with data center revenue up 30% year-over-year. Looking forward, Iron Mountain anticipates 25%+ growth in its data center business in 2026, equating to more than US$1 billion.
20. Cipher Mining
Number of U.S. Data Centers: 5
U.S. Active IT Capacity in 2025: 231 MW
Operator Type: Hyperscale Tier Two
Cipher Mining operates large compute campuses built around energy availability and processing intensity. Like Hut 8, the company is transitioning from a Bitcoin miner to an AI/HPC infrastructure provider. Its model is closely tied to power economics, with infrastructure decisions reflecting access to affordable and scalable electricity. Hut 8’s facilities are designed for sustained, high-throughput operations rather than diversified enterprise colocation.
In November 2025, Cipher Mining signed a 15-year, US$5.5 billion agreement with AWS to deliver 300 MW of AI data center capacity at its Texas facility. The company recently secured additional multi-billion-dollar leases in Texas, expanding into Ohio, and advancing a 3.2 GW development pipeline (2025 to 2029) focused on high-performance workloads.
21. Centersquare
Number of U.S. Data Centers: 55
U.S. Active IT Capacity in 2025: 229 MW
Operator Type: Colocation
Centersquare offers colocation services across a wide set of U.S. regions, giving enterprises flexibility beyond primary hyperscale markets. Its distributed footprint appeals to organizations that need regional presence, disaster recovery capacity, or edge-adjacent infrastructure. The operator has recently paid closer attention to supporting higher rack densities for GPU clusters and Gen AI workloads.
In October 2025, Centersquare announced a US$1 billion acquisition of 10 data centers across North America. The move will expand the company’s cloud infrastructure to Boston, Minneapolis, Dallas, Tulsa, Nashville, and Raleigh.
22. Flexential
Number of U.S. Data Centers: 39
U.S. Active IT Capacity in 2025: 228 MW
Operator Type: Colocation
Flexential blends colocation with managed IT and hybrid cloud services. Enterprises often turn to Flexential for support with migration, disaster recovery, and distributed deployments. Its national footprint provides room to scale across markets, while maintaining a services-led relationship with customers. CoreWeave, which is up next in our ranking, is a notable customer of and collaborator with Flexential.
In 2H 2025, Flexential raised US$800 million in green financing and secured US$1 billion in equity from GI Partners to fund next-generation data center development. Moreover, new facilities in Denver and Hillsboro, Oregon, will add capacity to support GPU-driven workloads.
23. CoreWeave
Number of U.S. Data Centers: 14
U.S. Active IT Capacity in 2025: 212 MW
Operator Type: Neocloud/Hyperscaler
CoreWeave has emerged as one of the fastest-growing AI-focused cloud companies in the United States. Its data centers are purpose-built for GPU-dense environments that power ML training and inference workloads. Unlike traditional cloud providers, CoreWeave’s neocloud strategy concentrates almost entirely on AI compute. That specialization has established the company as a preferred partner for enterprises and startups seeking dedicated AI infrastructure.
In January 2026—about 10 months after its IPO—NVIDIA invested US$2 billion into CoreWeave Class A common stock to help scale toward 5 GW of data center capacity by 2030. CoreWeave is advancing major AI-focused developments across Pennsylvania, Texas, and Virginia as it positions itself as a global AI hyperscaler.
24. Sabey Data Centers
Number of U.S. Data Centers: 20
U.S. Active IT Capacity in 2025: 210 MW
Operator Type: Colocation
Sabey has a long track record in data center development, with an emphasis on efficient power design and operational stability. Its campuses serve both enterprise and cloud tenants that require secure, scalable colocation environments. A disciplined growth strategy has allowed Sabey to expand steadily without overextending into speculative markets.
Sabey Data Centers is expanding its U.S. footprint to support AI and HPC, including a 54 MW expansion in Ashburn, Virginia, and new campuses planned in Montana and Indiana. The company is also progressing toward its 2029 net-zero goal through investments in liquid cooling and carbon-free energy.
25. TirePoint
Number of U.S. Data Centers: 39
U.S. Active IT Capacity in 2025: 183 MW
Operator Type: Colocation
TirePoint operates U.S. data centers geared toward enterprise colocation and high-density deployments. Its facilities are designed to support cloud and compute-intensive workloads, with an emphasis on scalable power and flexible infrastructure. The operator targets customers who need customizable data center environments in key regional markets.
Backed by nearly US$2 billion in asset-backed financings, TierPoint is reshaping its U.S. strategy around majority-owned real estate. The company is scaling a 100 MW expansion at its Pennsylvania campus and building a 20 MW data center in downtown St. Louis to support enterprise AI-driven workloads. At the same time, it is strengthening its managed services and hybrid cloud platform to deepen engagement with enterprises.
Conclusion
The scale and speed of data center expansion in the United States signal a market that is rapidly consolidating around power, capital access, and AI readiness. As our ranking shows, the top data center companies are racing to secure power capacity and demonstrate advanced AI/HPC capabilities. In many cases, they are also teaming up to reach new regions, control operating costs, and build flexibility into their data center portfolios. Understanding who truly controls cloud infrastructure has never been more important for identifying key competitors, potential partners, and cloud computing hubs.
These findings are based on ABI Research’s proprietary data center capacity tracking and publicly disclosed announcements from operators. For further evaluation of the largest data center operators, connect with a member of our team today.
Related Research:
- Forecasting Data Center Capacity Increases in the AI Era [Blog]
- Where Is AI Data Center Demand Growth Being Driven? [Blog]
- Cloud Service Provider Capacity Forecast Market Data Overview: 1Q 2026 [Presentation]
- Closing the Gap Between Data Center Expansion and Electricity Grid Limitations [Research Report}