Company lists · Data refreshed September 2026

Top 25 Data center infrastructure providers based in the United Kingdom

Name: Data center infrastructure providers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 501 companies tracked

RevenueBase identified 501 data center infrastructure providers headquartered in the United Kingdom as of September 2026 and tracks 21,068 professional contacts across them, including 9,113 with verified work emails. London is the largest hub.

This list covers data center infrastructure providers 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 19, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

501Companies

21,068Contacts tracked

9,113Verified emails

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The 25 largest data center infrastructure providers based in the United Kingdom

Ranked by team size

Top 25 of 501 data center infrastructure providers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to data center infrastructure providers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Colt Technology Services	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	5,001-10,000	6,233 contacts →
	Partial evidence “Colt Technology Services (Colt) is a global digital infrastructure company which creates extraordinary connections to help businesses succeed.” Source: RevenueBase Database · checked Sep 19, 2026
2	NTT Global Data Centers	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,842 contacts →
	Strong evidence “NTT Global Data Centers is a division of NTT DATA.” Source: RevenueBase Database · checked Sep 19, 2026
3	Kelly Group	Indirect evidence	Wembley, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,053 contacts →
	Indirect evidence “Established in 1985 to support the emerging UK cable television market, Kelly Group has diversified to meet the needs of our clients.” Source: RevenueBase Database · checked Sep 19, 2026
4	RED Engineering Design	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	785 contacts →
	Strong evidence “RED Engineering Design, a company of Tractebel, is a global engineering consultancy specialising in the design of complex, mission-critical Data Centre and digital infrastructure…” Source: RevenueBase Database · checked Sep 19, 2026
5	ONNEC	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	585 contacts →
	Partial evidence “Onnec is a leading partner for IT Infrastructure design, installation and operational support services.” Source: RevenueBase Database · checked Sep 19, 2026
6	Colt Data Centre Services	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	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 19, 2026
7	Global Switch	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	405 contacts →
	Strong evidence “Global Switch owns and operates sq ft sq m) of exceptional large-scale, multi customer, carrier and cloud neutral data centre space across Europe and Asia-Pacific.” Source: RevenueBase Database · checked Sep 19, 2026
8	Interoute	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	296 contacts →
	Partial evidence “Interoute is part of EXA Infrastructure, the largest dedicated digital infrastructure platform connecting Europe and North America, and owns kilometres of fibre network across 34…” Source: RevenueBase Database · checked Sep 19, 2026
9	Yondr Group	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	289 contacts →
	Strong evidence “Yondr is a developer, owner and operator of hyperscale data centers.” Source: RevenueBase Database · checked Sep 19, 2026
10	Pulsant	Strong evidence	Maidenhead, United KingdomHQ checked Sep 19, 2026	201-500	276 contacts →
	Strong evidence “Pulsant is a leading UK data centre and digital infrastructure platform which provides highly interconnected colocation and private Infrastructure-as-a-Service (IaaS) capabilities…” Source: RevenueBase Database · checked Sep 19, 2026
11	Avk-Seg	Strong evidence	Maidenhead, United KingdomHQ checked Sep 19, 2026	201-500	272 contacts →
	Strong evidence “AVK is the largest and fastest-growing supplier of innovative power solutions for data centres, AI infrastructure and leading organisations in the UK and Europe.” Source: RevenueBase Database · checked Sep 19, 2026
12	Smart Managed Solutions	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	259 contacts →
	Strong evidence “Over the last 15 years, we have worked in the world's top data centres and commercial facilities, providing quality engineering services.” Source: RevenueBase Database · checked Sep 19, 2026
13	Datacenterdynamics	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	245 contacts →
	Partial evidence “Empowering individuals who plan, build, operate, and supply digital infrastructure to make informed decisions faster.” Source: RevenueBase Database · checked Sep 19, 2026
14	Virtus Data Centres	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	237 contacts →
	Strong evidence “VIRTUS Data Centres (VIRTUS) is a trusted global leader in the data centre industry and the UK’s leading data centre company, committed to delivering reliable, resilient and…” Source: RevenueBase Database · checked Sep 19, 2026
15	Sudlows	Partial evidence	Manchester, United KingdomHQ checked Sep 19, 2026	201-500	228 contacts →
	Partial evidence “Sudlows is a multi-award winning Critical Infrastructures, Enterprise Services and Facilities Management specialist which provides a full range of technical services for…” Source: RevenueBase Database · checked Sep 19, 2026
16	Datalec Precision Installations Limited	Strong evidence	Buntingford Herts, United KingdomHQ checked Sep 19, 2026	51-200	178 contacts →
	Strong evidence “OFFICIAL ACCOUNT* Datalec Precision Installations provides world-class data centre design, build, and installation services that leverage unique technical expertise, including…” Source: RevenueBase Database · checked Sep 19, 2026
17	DOWDS	Indirect evidence	Ballymena, United KingdomHQ checked Sep 19, 2026	201-500	164 contacts →
	Indirect evidence “With 45+ years in business, Dowds expertise spans the full lifecycle of complex build environments – from initial design and systems integration to final handover and beyond.” Source: RevenueBase Database · checked Sep 19, 2026
18	Block Solutions	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	141 contacts →
	Indirect evidence “Block was created for one reason: to empower people and inspire change through technology.” Source: RevenueBase Database · checked Sep 19, 2026
19	Deepscale Technologies LTD	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	141 contacts →
	Strong evidence “Deepscale Technologies provide data center, enterprise & managed IT solutions across the globe that enhance how businesses operate.” Source: RevenueBase Database · checked Sep 19, 2026
20	BCS Consultancy	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	132 contacts →
	Strong evidence “Bringing data centre projects to life on time and budget.” Source: RevenueBase Database · checked Sep 19, 2026
21	ARK Data Centres	Strong evidence	Corsham, United KingdomHQ checked Sep 19, 2026	51-200	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 19, 2026
22	Beeks Group	Partial evidence	Glasgow, United KingdomHQ checked Sep 19, 2026	51-200	119 contacts →
	Partial evidence “Beeks is a leading force in financial technology infrastructure, specialising in Infrastructure as a Service (IaaS) for the high-frequency trading sector within capital markets…” Source: RevenueBase Database · checked Sep 19, 2026
23	MICIM	Indirect evidence	Reading, United KingdomHQ checked Sep 19, 2026	51-200	92 contacts →
	Indirect evidence “The founders of MiCiM (Mission Critical Management)[pronounced "My Sim"] created the company with a shared vision: to offer a focused, end-to-end, hands-on project management and…” Source: RevenueBase Database · checked Sep 19, 2026
24	Excool	Strong evidence	Bromsgrove, United KingdomHQ checked Sep 19, 2026	201-500	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 19, 2026
25	Sysgroup	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	89 contacts →
	Indirect evidence “SysGroup is the services leader for realising AI transformation, as an award-winning managed IT services, cloud hosting, and IT consultancy provider.” Source: RevenueBase Database · checked Sep 19, 2026

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: data center infrastructure providers. 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 data center infrastructure providers.
Partial evidence: Its own public description names part of data center infrastructure providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name data center infrastructure providers. 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 501 data center infrastructure providers based in the United Kingdom

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Data center infrastructure providers based in the United Kingdom at a glance

As of Sep 19, 2026

43.3%Verified-email coverage

42.1Average contacts per company

11-50Median size (employees)

31.7%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

189

11-50

187

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 501 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 data center infrastructure providers, 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 “data center infrastructure providers”. 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 data center infrastructure providers), 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 data center infrastructure providers, 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, 9,113 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 19, 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.

Data center infrastructure providers by metro

Data center infrastructure providers in London159

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 data center infrastructure providers, 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 data center infrastructure providers are there based in the United Kingdom?

RevenueBase identified 501 data center infrastructure providers 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 Technology Services, headquartered in London, tops this list with the largest team on record.

Which city has the most data center infrastructure providers?

London leads with 159 headquartered companies, followed by Manchester (14) and Reading (8).

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 9,113 verified decision-maker contacts tracked across these 501 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 19, 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.