Company lists · Data refreshed September 2026

Top 25 Data center consulting firms based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 542 companies tracked

RevenueBase identified 542 data center consulting firms headquartered in the United Kingdom as of September 2026 and tracks 8,529 professional contacts across them, including 3,201 with verified work emails and 824 with mobile numbers. London is the largest hub.

This list covers data center consulting firms 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 1, 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

542Companies

8,529Contacts tracked

3,201Verified emails

824Mobile numbers

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The 25 largest data center consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 542 data center consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 1, 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	ONNEC	Indirect evidence	London, United Kingdom	501-1,000	580 contacts →
	Indirect evidence “Onnec is a leading partner for IT Infrastructure design, installation and operational support services.” Source: RevenueBase Database · checked Sep 1, 2026
2	Maintech, Incorporated	Indirect evidence	London, United Kingdom	501-1,000	529 contacts →
	Indirect evidence “Maintech: A trusted global partner for IT Infrastructure Solutions and Managed Services, leveraging over 50 years of experience to empower businesses worldwide.” Source: RevenueBase Database · checked Sep 1, 2026
3	Colt Data Centre Services	Strong evidence	London, United Kingdom	201-500	421 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 1, 2026
4	Zenzero	Indirect evidence	Coventry, United Kingdom	501-1,000	403 contacts →
	Indirect evidence “We believe successful businesses are underpinned by quality IT infrastructure.” Source: RevenueBase Database · checked Sep 1, 2026
5	Smart Managed Solutions	Strong evidence	London, United Kingdom	501-1,000	264 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 1, 2026
6	Sudlows	Indirect evidence	London, United Kingdom	201-500	230 contacts →
	Indirect 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 1, 2026
7	Proact IT Group AB	Partial evidence	Leeds, United Kingdom	1,001-5,000	224 contacts →
	Partial evidence “Proact is a leading IT expert helping customers secure business critical data via best in class hybrid cloud solutions.” Source: RevenueBase Database · checked Sep 1, 2026
8	Proact IT UK	Strong evidence	Glasgow, United Kingdom	1,001-5,000	206 contacts →
	Strong evidence “Proact is Europe’s leading specialist in data and information management with focus on cloud services and data centre solutions.” Source: RevenueBase Database · checked Sep 1, 2026
9	Datalec Precision Installations Limited	Strong evidence	Buntingford Herts, United Kingdom	51-200	179 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 1, 2026
10	Creative ITC	Indirect evidence	London, United Kingdom	201-500	175 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 1, 2026
11	MICIM	Indirect evidence	Reading, United Kingdom	51-200	91 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 1, 2026
12	Sysgroup	Indirect evidence	London, United Kingdom	51-200	88 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 1, 2026
13	Technimove	Indirect evidence	London, United Kingdom	51-200	86 contacts →
	Indirect evidence “We are Technimove.” Source: RevenueBase Database · checked Sep 1, 2026
14	Excool	Strong evidence	Bromsgrove, United Kingdom	201-500	86 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 1, 2026
15	ORM	Indirect evidence	London, United Kingdom	51-200	82 contacts →
	Indirect evidence “ORM is now Paragon DCX.” Source: RevenueBase Database · checked Sep 1, 2026
16	Future-Tech	Strong evidence	Wokingham, United Kingdom	51-200	80 contacts →
	Strong evidence “Future-tech is a specialist data centre engineering services provider.” Source: RevenueBase Database · checked Sep 1, 2026
17	Brightsolid	Indirect evidence	Dundee, United Kingdom	51-200	77 contacts →
	Indirect evidence “Brightsolid is expert in all things colocation, cloud and cyber security.” Source: RevenueBase Database · checked Sep 1, 2026
18	6point6 Part Of Accenture	Indirect evidence	London, United Kingdom	201-500	73 contacts →
	Indirect evidence “6point6 drives the right change in an organisation through the positive impact of technology.” Source: RevenueBase Database · checked Sep 1, 2026
19	Teknicor Corporation	Strong evidence	London, United Kingdom	51-200	70 contacts →
	Strong evidence “Teknicor is a global provider of data centre infrastructure, data protection and managed cloud solutions.” Source: RevenueBase Database · checked Sep 1, 2026
20	Cogeco Peer 1	Indirect evidence	Southampton, United Kingdom	501-1,000	67 contacts →
	Indirect evidence “Cogeco Peer 1 has changed its name to Aptum Technologies.” Source: RevenueBase Database · checked Sep 1, 2026
21	Onyx Group	Indirect evidence	Gateshead, United Kingdom	51-200	66 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 1, 2026
22	IDS Group	Strong evidence	London, United Kingdom	51-200	55 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 1, 2026
23	Nesevo Group	Strong evidence	Birmingham, United Kingdom	51-200	48 contacts →
	Strong evidence “nesevo – Your Trusted Partner in Data Center & IT Solutions At nesevo, we deliver end-to-end IT and data center solutions with precision, efficiency, and full control.” Source: RevenueBase Database · checked Sep 1, 2026
24	Phoenix Trescray	Strong evidence	London London, United Kingdom	51-200	39 contacts →
	Strong evidence “We are a leading IT installation company offering complete infrastructure solutions within data centre and commercial sectors.” Source: RevenueBase Database · checked Sep 1, 2026
25	Bladeroom Data Centres	Strong evidence	Leamington Spa, United Kingdom	51-200	36 contacts →
	Strong evidence “BladeRoom Data Centres are designed to be globally consistent and deployable anywhere in the world with speed and precision.” Source: RevenueBase Database · checked Sep 1, 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 542 data center consulting firms based in the United Kingdom

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Data center consulting firms based in the United Kingdom at a glance

As of Sep 1, 2026

37.5%Verified-email coverage

9.7%Mobile-number coverage

15.7Average contacts per company

1-10Median size (employees)

40.2%Largest-city concentration · London

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

319

11-50

151

51-200

201-500

501-1,000

1,001-5,000

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 the 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 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, 3,201 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 1, 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

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 the United Kingdom?

RevenueBase identified 542 data center consulting firms 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?

ONNEC, 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 3,201 verified decision-maker contacts tracked across these 542 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 1, 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.