Company lists · Data refreshed September 2026
Top 25 Green data center companies based in the United Kingdom
RevenueBase identified 73 green data center companies headquartered in the United Kingdom as of September 2026 and tracks 1,402 professional contacts across them, including 532 with verified work emails. London is the largest hub.
This list covers green data center companies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest green data center companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 415 contacts → | ||||
Strong evidence “At Colt Data Centre Services, we aspire to our customers’ success, ensuring your growth is supported by the best infrastructure solution for your business’ unique vision.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 125 contacts → | ||||
Strong evidence “Ark empower businesses to work from anywhere in the world by designing and operating data centres which lead the market in social responsibility.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 90 contacts → | ||||
Strong evidence “Established in 2010, Excool has consistently led the industry in designing, developing, and delivering unique energy-efficient cooling solutions for data centers across the globe.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 89 contacts → | ||||
Indirect evidence “Krystal is a premium UK-based web hosting and cloud services company, here to support you and the planet.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 45 contacts → | ||||
Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 29 contacts → | ||||
Strong evidence “INFINITI is a one-stop data centre services provider with an eye for detail and outstanding customer service.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 25 contacts → | ||||
Indirect evidence “OctaiPipe is an AI-powered optimisation software solution that delivers up to 30% savings in cooling energy use with zero disruption.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 22 contacts → | ||||
Strong evidence “GreenScale is redefining the future of sustainable digital infrastructure across Europe’s expanding data centre markets.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 17 contacts → | ||||
Strong evidence “VivoPower PLC (Nasdaq: VIVO) is a sustainable infrastructure company focused on the development of renewable-powered sovereign AI data centres, with a corporate presence across…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 16 contacts → | ||||
Strong evidence “Polar is a leading data center operator in Europe.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 14 contacts → | ||||
Strong evidence “Data Centres already emit more carbon than the entire aviation industry, and with AI fuelling a new boom in data centre construction, they will consume almost 10% of global…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 14 contacts → | ||||
Strong evidence “Part of the Arrow Group, AIMES is an award-winning technology company that provides data centre and cloud computing services to businesses across a range of industries, including…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 12 contacts → | ||||
Strong evidence “We are the only Data Centre company that recaptures the heat compute generates & repurposes it for social good, for free.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 9 contacts → | ||||
Strong evidence “With over 25 year pedigree in Data Centre hosting and connectivity and having won some 17 nominations and awards, Datanet is an established leader in providing sustainable racks…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 9 contacts → | ||||
Indirect evidence “Interact helps organisations buy and change server hardware better, with evidence.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 9 contacts → | ||||
Partial evidence “Gaia is a UK-based green technology company that builds online tools for companies and corporations within the environmental space.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 8 contacts → | ||||
Strong evidence “Our purpose-built, Tier aligned data centres harness renewable energy to power projects of any scale.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 8 contacts → | ||||
Strong evidence “No watt wasted | Data Centre Co-Location | Renewables RenewaBlox converts wasted, curtailed or stranded energy into revenue-generating flexible compute & heat.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 8 contacts → | ||||
Indirect evidence “Flowing Energy Solutions are focused on creating a greener future by reducing each homes carbon footprint.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 8 contacts → | ||||
Strong evidence “Nubis design, build and install bespoke data centre solutions to reduce costs, optimise performance and minimise carbon footprint” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 7 contacts → | ||||
Indirect evidence “Sustainable and carbon neutral computing, powered and cooled by glacier.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 6 contacts → | ||||
Strong evidence “At Stellium we provide the UK’s best-in-class data centre and connectivity services for companies operating in the energy sector, technology and internet services, visual media…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 6 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 4 contacts → | ||||
Strong evidence “ITILITY is a leading UK-based managed hosting and co-location service provider with a fully-owned purpose built data centre.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 4 contacts → | ||||
Indirect evidence “OmCore provide digital products and services for building high performing low carbon websites.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: green data center companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names green data center companies.
- Partial evidence
- Its own public description names part of green data center companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name green data center companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 73 green data center companies based in the United Kingdom
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Green data center companies based in the United Kingdom at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 73 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among green data center companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United Kingdom whose own description of what they do matches “green data center companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names green data center companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among green data center companies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 532 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Green data center companies by metro
- Green data center companies in London27
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names green data center companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many green data center companies are there based in the United Kingdom?
RevenueBase identified 73 green data center companies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Colt Data Centre Services, headquartered in London, tops this list with the largest team on record.
Which city has the most green data center companies?
London leads with 27 headquartered companies, followed by Manchester (5) and Brighton (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 532 verified decision-maker contacts tracked across these 73 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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