Company lists · Data refreshed September 2026

Top 25 Data center design companies based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 7, 2026 244 companies tracked

RevenueBase identified 244 data center design companies headquartered in the United Kingdom as of September 2026 and tracks 8,854 professional contacts across them, including 4,243 with verified work emails and 660 with mobile numbers. London is the largest hub.

This list covers data center design 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 7, 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 7, 2026 86% judged on-target in blind review

244Companies

8,854Contacts tracked

4,243Verified emails

660Mobile numbers

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The 25 largest data center design companies based in the United Kingdom

Ranked by team size

Top 25 of 244 data center design companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 7, 2026. RevenueBase Smart Search rates how each company's information relates to data center design companies: 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	NTT Global Data Centers	Strong evidence	London, United KingdomHQ checked Sep 7, 2026	1,001-5,000	1,842 contacts →
	“NTT Global Data Centers is a division of NTT DATA.” Source: company website · checked Sep 7, 2026
2	RED Engineering Design	Strong evidence	London, United KingdomHQ checked Sep 7, 2026	501-1,000	785 contacts →
	“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: company website · checked Sep 7, 2026
3	ONNEC	Partial evidence	London, United KingdomHQ checked Sep 7, 2026	501-1,000	585 contacts →
	“Onnec is a leading partner for IT Infrastructure design, installation and operational support services.” Source: company website · checked Sep 7, 2026
4	Colt Data Centre Services	Strong evidence	London, United KingdomHQ checked Sep 7, 2026	201-500	415 contacts →
	“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: company website · checked Sep 7, 2026
5	Global Switch	Strong evidence	London, United KingdomHQ checked Sep 7, 2026	201-500	405 contacts →
	“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: company website · checked Sep 7, 2026
6	Avk-Seg	Strong evidence	Maidenhead, United KingdomHQ checked Sep 7, 2026	201-500	272 contacts →
	“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: company website · checked Sep 7, 2026
7	Smart Managed Solutions	Strong evidence	London, United KingdomHQ checked Sep 7, 2026	501-1,000	259 contacts →
	“Over the last 15 years, we have worked in the world's top data centres and commercial facilities, providing quality engineering services.” Source: company website · checked Sep 7, 2026
8	Virtus Data Centres	Strong evidence	London, United KingdomHQ checked Sep 7, 2026	201-500	237 contacts →
	“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: company website · checked Sep 7, 2026
9	Sudlows	Indirect evidence	Manchester, United KingdomHQ checked Sep 7, 2026	201-500	228 contacts →
	“Sudlows is a multi-award winning Critical Infrastructures, Enterprise Services and Facilities Management specialist which provides a full range of technical services for…” Source: company website · checked Sep 7, 2026
10	Datalec Precision Installations Limited	Strong evidence	Buntingford Herts, United KingdomHQ checked Sep 7, 2026	51-200	178 contacts →
	“OFFICIAL ACCOUNT* Datalec Precision Installations provides world-class data centre design, build, and installation services that leverage unique technical expertise, including…” Source: company website · checked Sep 7, 2026
11	DOWDS	Partial evidence	Ballymena, United KingdomHQ checked Sep 7, 2026	201-500	164 contacts →
	“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: company website · checked Sep 7, 2026
12	BCS Consultancy	Strong evidence	London, United KingdomHQ checked Sep 7, 2026	51-200	132 contacts →
	“Bringing data centre projects to life on time and budget.” Source: company website · checked Sep 7, 2026
13	ARK Data Centres	Strong evidence	Corsham, United KingdomHQ checked Sep 7, 2026	51-200	125 contacts →
	“Ark empower businesses to work from anywhere in the world by designing and operating data centres which lead the market in social responsibility.” Source: company website · checked Sep 7, 2026
14	Excool	Strong evidence	Bromsgrove, United KingdomHQ checked Sep 7, 2026	201-500	90 contacts →
	“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: company website · checked Sep 7, 2026
15	Technimove	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	51-200	87 contacts →
	“We are Technimove.” Source: company website · checked Sep 7, 2026
16	Future-Tech	Strong evidence	Wokingham, United KingdomHQ checked Sep 7, 2026	51-200	82 contacts →
	“Future-tech is a specialist data centre engineering services provider.” Source: company website · checked Sep 7, 2026
17	Brightsolid	Indirect evidence	Dundee, United KingdomHQ checked Sep 7, 2026	51-200	76 contacts →
	“Brightsolid is expert in all things colocation, cloud and cyber security.” Source: company website · checked Sep 7, 2026
18	Amulet Hotkey	Partial evidence	Newton Abbot, United KingdomHQ checked Sep 7, 2026	51-200	67 contacts →
	“We innovate exceptional technology infrastructure providing best-in-class power, agility and security for mission critical and data intensive workloads.” Source: company website · checked Sep 7, 2026
19	Onyx Group	Indirect evidence	Stockton-on-tees, United KingdomHQ checked Sep 7, 2026	51-200	66 contacts →
	“We would like to share some exciting news – Onyx Group has been acquired by cloud, colocation and managed hosting expert Pulsant, expanding its network to 15 UK-based datacentres.” Source: company website · checked Sep 7, 2026
20	UNG	Indirect evidence	Gateshead, United KingdomHQ checked Sep 7, 2026	51-200	57 contacts →
	“UNG is a group of specialist Building Services Companies driven by a passion for innovation, efficiency, and excellence within our industry sectors.” Source: company website · checked Sep 7, 2026
21	IDS Group	Strong evidence	Fleet, United KingdomHQ checked Sep 7, 2026	51-200	56 contacts →
	“IDS Group are a global data centre and colocation specialist providing a variety of services to support our customers around the world from both our UK and Netherlands office…” Source: company website · checked Sep 7, 2026
22	Acuutech	Indirect evidence	Loughton, United KingdomHQ checked Sep 7, 2026	51-200	53 contacts →
	“Acuutech is an IT solutions provider, delivering integrated platforms and services to a global client base.” Source: company website · checked Sep 7, 2026
23	Durata	Strong evidence	Middlesbrough, United KingdomHQ checked Sep 7, 2026	11-50	47 contacts →
	“Durata is the trusted partner your business needs for critical power, legacy optimisation and modular data centre solutions.” Source: company website · checked Sep 7, 2026
24	BRG Technologies	Strong evidence	Cheltenham, United KingdomHQ checked Sep 7, 2026	51-200	46 contacts →
	“BRG Technologies is the global leader in the off-site construction of mission-critical facilities, specialising in the data centre and healthcare sectors.” Source: company website · checked Sep 7, 2026
25	Phoenix Trescray	Strong evidence	London, United KingdomHQ checked Sep 7, 2026	51-200	39 contacts →
	“We are a leading IT installation company offering complete infrastructure solutions within data centre and commercial sectors.” Source: company website · checked Sep 7, 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 design 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 data center design companies.
Partial evidence: Its own public description names part of data center design companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name data center design 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 244 data center design companies based in the United Kingdom

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Data center design companies based in the United Kingdom at a glance

As of Sep 7, 2026

47.9%Verified-email coverage

7.5%Mobile-number coverage

36.3Average contacts per company

11-50Median size (employees)

33.6%Largest-city concentration · London

Sep 7, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

3,8650–30

34031–60

1061–90

1390–180

15180+

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 design 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 “data center design 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 data center design 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 data center design 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, 4,243 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 7, 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 design companies by metro

Data center design companies in London82

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 design 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 data center design companies are there based in the United Kingdom?

RevenueBase identified 244 data center design 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?

NTT Global Data Centers, headquartered in London, tops this list with the largest team on record.

Which city has the most data center design companies?

London leads with 82 headquartered companies, followed by Manchester (6) and Reading (6).

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 4,243 verified decision-maker contacts tracked across these 244 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 7, 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.