Company lists · Data refreshed September 2026

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

Name: Data center 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 10, 2026 217 companies tracked

RevenueBase identified 217 data center consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 5,949 professional contacts across them, including 2,372 with verified work emails and 489 with mobile numbers. London is the largest hub.

This list covers data center 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 10, 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 10, 2026 86% judged on-target in blind review

217Companies

5,949Contacts tracked

2,372Verified emails

489Mobile numbers

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

Ranked by team size

Top 25 of 217 data center consulting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 10, 2026. RevenueBase Smart Search rates how each company's information relates to data center 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 10, 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 10, 2026
2	ONNEC	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	501-1,000	585 contacts →
	Indirect evidence “Onnec is a leading partner for IT Infrastructure design, installation and operational support services.” Source: RevenueBase Database · checked Sep 10, 2026
3	Colt Data Centre Services	Strong evidence	London, United KingdomHQ checked Sep 10, 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 10, 2026
4	Zenzero	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	501-1,000	401 contacts →
	Indirect evidence “We believe successful businesses are underpinned by quality IT infrastructure.” Source: RevenueBase Database · checked Sep 10, 2026
5	Cartesian	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	201-500	302 contacts →
	Partial evidence “Cartesian is a specialist consulting firm focused on the global telecommunications, media, and technology industries and is now part of Bounteous, an AI services firm helping…” Source: RevenueBase Database · checked Sep 10, 2026
6	Smart Managed Solutions	Strong evidence	London, United KingdomHQ checked Sep 10, 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 10, 2026
7	Creative ITC	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	201-500	173 contacts →
	Indirect evidence “Creative ITC is a global cloud and managed services provider built for complex design, engineering, and business critical IT environments.” Source: RevenueBase Database · checked Sep 10, 2026
8	CJC LTD	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	99 contacts →
	Partial evidence “Founded in CJC is the leading independent market data technology consultancy and services firm.” Source: RevenueBase Database · checked Sep 10, 2026
9	Sysgroup	Indirect evidence	London, United KingdomHQ checked Sep 10, 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 10, 2026
10	Technimove	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	87 contacts →
	Indirect evidence “We are Technimove.” Source: RevenueBase Database · checked Sep 10, 2026
11	Constor Solutions	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	87 contacts →
	Indirect evidence “At Constor Solutions, we believe that technology is the backbone of a successful business.” Source: RevenueBase Database · checked Sep 10, 2026
12	ORM	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	82 contacts →
	Indirect evidence “ORM is now Paragon DCX.” Source: RevenueBase Database · checked Sep 10, 2026
13	6point6 Part Of Accenture	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	201-500	68 contacts →
	Indirect evidence “6point6 drives the right change in an organisation through the positive impact of technology.” Source: RevenueBase Database · checked Sep 10, 2026
14	MIX Consultancy LTD	Strong evidence	London, United KingdomHQ checked Sep 10, 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 10, 2026
15	PPA Phillipspage Associates	Strong evidence	London, United KingdomHQ checked Sep 10, 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 10, 2026
16	3dec	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	30 contacts →
	Indirect evidence “A new breed of digital technology consultancy.” Source: RevenueBase Database · checked Sep 10, 2026
17	DCD Academy	Strong evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	30 contacts →
	Strong evidence “DCD Academy is the data center industry’s premier workforce development partner.” Source: RevenueBase Database · checked Sep 10, 2026
18	Deerns UK	Indirect evidence	London, United KingdomHQ checked Sep 10, 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 10, 2026
19	Infrastructure Design Solutions	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	24 contacts →
	Indirect 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 10, 2026
20	work2gether.io	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	23 contacts →
	Partial evidence “Empowering Elite Brands in the Digital Landscape: Your IT Consulting and Services Partner Transforming the Future with Cloud Solutions Technologies!” Source: RevenueBase Database · checked Sep 10, 2026
21	Greenscale Data Centres	Strong evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	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 10, 2026
22	Global Technical Realty	Strong evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	22 contacts →
	Strong evidence “Global Technical Realty (GTR) has the data center experience you need.” Source: RevenueBase Database · checked Sep 10, 2026
23	Datacenter People	Strong evidence	London, United KingdomHQ checked Sep 10, 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 10, 2026
24	APTO	Strong evidence	London, United KingdomHQ checked Sep 10, 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 10, 2026
25	H3o Digital	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	17 contacts →
	Indirect evidence “H3O Digital provides enterprise class technical services for businesses of all sizes.” Source: RevenueBase Database · checked Sep 10, 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 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 consulting firms.
Partial evidence: Its own public description names part of data center 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 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 217 data center consulting firms based in London, United Kingdom

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

As of Sep 10, 2026

39.9%Verified-email coverage

8.2%Mobile-number coverage

27.4Average contacts per company

1-10Median size (employees)

100.5%Largest-city concentration · London

Sep 10, 2026Page data refreshed

Companies by employee count

1-10

134

11-50

51-200

201-500

501-1,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 13.0d

2,1560–30

21331–60

061–90

190–180

2180+

Company record updated

Median 72.0d

00–30

2,25731–60

2,71561–90

65890–180

319180+

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 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 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 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 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, 2,372 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 10, 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 consulting firms by metro in the United Kingdom

Data center consulting firms in London218

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 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 consulting firms are there based in London, United Kingdom?

RevenueBase identified 217 data center 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 has the most data center consulting firms?

London leads with 218 headquartered companies, followed by Manchester (11) and Reading (11).

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 2,372 verified decision-maker contacts tracked across these 217 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 10, 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.