Company lists · Data refreshed September 2026

Top 25 Data center design and consulting firms based in London, United Kingdom

Name: Data center design and consulting firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 88 companies tracked

RevenueBase identified 88 data center design and consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 3,043 professional contacts across them, including 1,637 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers data center design and consulting firms headquartered in London, 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 28, 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 28, 2026 86% judged on-target in blind review

88Companies

3,043Contacts tracked

1,637Verified emails

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The 25 largest data center design and consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 88 data center design and consulting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to data center design and consulting firms: 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	RED Engineering Design	Strong evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
2	ONNEC	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
3	Colt Data Centre Services	Strong evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
4	Zenzero	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	401 contacts →
	Indirect evidence “We believe successful businesses are underpinned by quality IT infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026
5	Smart Managed Solutions	Strong evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
6	Sheehan Nagle Hartray Associates, LTD A Woolpert Company	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	37 contacts →
	Indirect evidence “Sheehan Nagle Hartray Associates, Ltd.” Source: RevenueBase Database · checked Sep 28, 2026
7	MIX Consultancy LTD	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Strong evidence “MiX is an independent consultancy specialising in IT Infrastructure, Communication, Data Centre, Audio Visual, Physical Security & SMART Buildings Technology Solutions.” Source: RevenueBase Database · checked Sep 28, 2026
8	PPA Phillipspage Associates	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	31 contacts →
	Strong evidence “Formed in 2008 PPA is a specialist Mission Critical Solutions consultancy delivering turnkey Data Centre solutions including Mechanical, Electrical, Public Health, ICT and…” Source: RevenueBase Database · checked Sep 28, 2026
9	3dec	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	30 contacts →
	Indirect evidence “A new breed of digital technology consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
10	DCD Academy	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	30 contacts →
	Strong evidence “DCD Academy is the data center industry’s premier workforce development partner.” Source: RevenueBase Database · checked Sep 28, 2026
11	Deerns UK	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	24 contacts →
	Indirect evidence “An independent mechanical and electrical engineering firm which operates worldwide, Deerns has the capacity to make ideas a reality.” Source: RevenueBase Database · checked Sep 28, 2026
12	Infrastructure Design Solutions	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	24 contacts →
	Partial evidence “IDS is a global ICT and security infrastructure design consultancy, specialized in structured cabling design and physical security engineering solutions that meet the highest…” Source: RevenueBase Database · checked Sep 28, 2026
13	Global Technical Realty	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	22 contacts →
	Strong evidence “Global Technical Realty (GTR) has the data center experience you need.” Source: RevenueBase Database · checked Sep 28, 2026
14	Datacenter People	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	21 contacts →
	Strong evidence “Datacenter People is the leading recruitment company serving the data center, cloud and internet sectors worldwide; empowering the identification and engagement of hard-to-find…” Source: RevenueBase Database · checked Sep 28, 2026
15	Skyline Group	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	20 contacts →
	Strong evidence “Skyline Group specialises in recruitment for the design and construction of data centres and complex building projects.” Source: RevenueBase Database · checked Sep 28, 2026
16	APTO	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	19 contacts →
	Strong evidence “Apto deliver highly customised, built-to-suit data centre capacity to help fast track your entry into high-potential markets that will drive future demand.” Source: RevenueBase Database · checked Sep 28, 2026
17	Imagine The Future Consulting LTD	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	16 contacts →
	Strong evidence “ITF provide commissioning planning and execution services for Hyperscale Data Centers.” Source: RevenueBase Database · checked Sep 28, 2026
18	Vipa Digital	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	13 contacts →
	Strong evidence “With an extensive sector knowledge, VIPA Digital is uniquely positioned to support Investors, Developers, Operators and Consumers of Data Centre Infrastructure as they navigate…” Source: RevenueBase Database · checked Sep 28, 2026
19	Techre Consulting	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	9 contacts →
	Strong evidence “TechRE is a specialist data centre consultancy team that has a fundamental understanding of how data centres operate and a thorough knowledge of the best ways to maximise value…” Source: RevenueBase Database · checked Sep 28, 2026
20	Verne Global LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	6 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
21	Dacpros	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Strong evidence “Data Centre Professionals Ltd (also known as Dacpros) is a leading smart-hand service provider in the UK, renowned for its proactive and innovative approach.” Source: RevenueBase Database · checked Sep 28, 2026
22	Deltacanon	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “At DeltaCanon our mission is simple; To deliver industry leading Design & Build solutions for high spec ICT projects across the globe.” Source: RevenueBase Database · checked Sep 28, 2026
23	Zymbian	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Zymbian is a technology consultancy specialising in the design, management and delivery of IT infrastructure solutions both in the traditional datacentre and on cloud platforms.” Source: RevenueBase Database · checked Sep 28, 2026
24	Vettabase LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “We provide expert consulting on your database infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026
25	The Data Centre Group	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	3 contacts →
	Strong evidence “The Data Centre Group provides high-performance, secure, and energy-efficient data centre solutions, ensuring seamless data management and storage for businesses of all sizes.” Source: RevenueBase Database · checked Sep 28, 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 and consulting firms. 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 and consulting firms.
Partial evidence: Its own public description names part of data center design and consulting firms, 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 and consulting firms. 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 88 data center design and consulting firms based in London, United Kingdom

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Data center design and consulting firms based in London, United Kingdom at a glance

As of Sep 28, 2026

53.8%Verified-email coverage

34.6Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 88 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 design and consulting firms, 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 London, United Kingdom whose own description of what they do matches “data center design and consulting firms”. 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 and consulting firms), 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 and consulting firms, and records with no verified work email. Companies headquartered outside London 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, 1,637 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 28, 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.

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 and consulting firms, 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 and consulting firms are there based in London, United Kingdom?

RevenueBase identified 88 data center design and consulting firms headquartered in London, 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?

RED Engineering Design, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most data center design and consulting firms?

London leads the United Kingdom with 88 headquartered companies, followed by Manchester (6) and Leeds (4).

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 1,637 verified decision-maker contacts tracked across these 88 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 28, 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.