The data center industry is facing one of the biggest challenges of our time: sustainability and energy efficiency. With global energy consumption on the rise, many of the leading providers are increasingly turning to renewable energy, carbon-neutral operating models and innovative technologies to reduce their carbon footprint. Companies such as Google, Microsoft and AWS have committed to running their data centers entirely on renewable energy. Green Mountain and EcoDataCenter are among the pioneers when it comes to using sustainable energy sources and climate-positive data centers. Equinix, Digital Realty and Iron Mountain are also investing heavily in energy-efficient infrastructures and sustainable operating processes.
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The following ranking is based on our exclusive list of the 100 largest data center investors in Europe. The extensive database contains specialized data center companies, investment managers, cloud and hosting providers as well as telecommunications companies that actively invest in, own and manage data centers in Europe. Our list can be easily downloaded as an Excel file via our online store. In addition to general contact details and the names of the management, we also highlight the regional focus (Europe, North America, South America, Africa, Middle East, APAC) of the companies and provide the number of data centers, if publicly available.
List of the Top 10 data center investors with a focus on sustainability
The following table shows the top 10 most sustainable data center investors who are global leaders in the implementation of green data centers.
| Country of Origin | Company | City | Investor Type | Number of Data Centers (2025) | Sustainability Index |
|---|---|---|---|---|---|
| USA | Digital Realty | Austin | Data Center Company | 300 | Focuses on renewable energy, energy-efficient designs, and CO₂ reduction. |
| USA | Microsoft (Azure) | Redmond | Cloud & Hosting Provider | 300 | Goal: CO₂-negative by 2030, massive investments in green data centers. |
| USA | Equinix | Redwood City | Other | 260 | Committed to carbon neutrality by 2030, relies on renewable energy. |
| USA | IBM | New York | Cloud & Hosting Provider | 60 | Reducing energy consumption, increased use of renewable energy. |
| Germany | NTT Global Data Centers EMEA GmbH | Hattersheim | Data Center Company | 48 | Sustainable data centers, multiple certified with the ‘Blue Angel’ label. |
| USA | Google Data Centers | Mountain View | Cloud & Hosting Provider | 40 | 100% renewable energy since 2017, innovative cooling methods. |
| USA | Iron Mountain | Boston | Cloud & Hosting Provider | 25 | 100% renewable energy, focus on energy-efficient technologies. |
| Norway | Green Mountain | Rennesøy | Data Center Company | 5 | 100% hydropower, high energy efficiency at Scandinavian locations. |
| Sweden | EcoDataCenter | Falun | Data Center Company | 4 | Climate-positive data center, combining renewable energy with efficient design. |
Picture: Appolinary Kalashnikova via Unsplash (11.02.2025)
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