Company lists · Data refreshed September 2026

Top 25 Colocation data center companies based in the United Kingdom

Name: Colocation data center 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 19, 2026 166 companies tracked

RevenueBase identified 166 colocation data center companies headquartered in the United Kingdom as of September 2026 and tracks 5,330 professional contacts across them, including 2,393 with verified work emails. London is the largest hub.

This list covers colocation data center 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 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

166Companies

5,330Contacts tracked

2,393Verified emails

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

Ranked by team size

Top 25 of 166 colocation data center companies 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 colocation data center 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 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
2	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
3	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
4	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
5	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
6	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
7	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
8	Krystal	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	89 contacts →
	Indirect evidence “Krystal is a premium UK-based web hosting and cloud services company, here to support you and the planet.” Source: RevenueBase Database · checked Sep 19, 2026
9	Hyve Managed Hosting	Partial evidence	Brighton, United KingdomHQ checked Sep 19, 2026	51-200	77 contacts →
	Partial evidence “We are a fully-managed global hosting provider offering industry-leading technology with a customer-centric approach.” Source: RevenueBase Database · checked Sep 19, 2026
10	Brightsolid	Partial evidence	Dundee, United KingdomHQ checked Sep 19, 2026	51-200	76 contacts →
	Partial evidence “Brightsolid is expert in all things colocation, cloud and cyber security.” Source: RevenueBase Database · checked Sep 19, 2026
11	Onyx Group	Partial evidence	Stockton-on-tees, United KingdomHQ checked Sep 19, 2026	51-200	66 contacts →
	Partial 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 19, 2026
12	IDS Group	Strong evidence	Fleet, United KingdomHQ checked Sep 19, 2026	51-200	56 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 19, 2026
13	Datavita	Indirect evidence	Chapelhall, United KingdomHQ checked Sep 19, 2026	11-50	45 contacts →
	Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 19, 2026
14	Bladeroom Data Centres	Strong evidence	Cheltenham, United KingdomHQ checked Sep 19, 2026	51-200	37 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 19, 2026
15	Coreix	Partial evidence	Welwyn Garden City, United KingdomHQ checked Sep 19, 2026	11-50	33 contacts →
	Partial evidence “Coreix is a managed hosting, colocation and network services provider which offers secure, agile, scalable and robust hosting solutions to clients in varying sectors including…” Source: RevenueBase Database · checked Sep 19, 2026
16	Asanti	Strong evidence	Hamilton, United KingdomHQ checked Sep 19, 2026	11-50	29 contacts →
	Strong evidence “Asanti is a colocation data centre provider, created by a team who have a wealth of industry experience designing, deploying and managing data centres.” Source: RevenueBase Database · checked Sep 19, 2026
17	Infiniti IT Limited	Strong evidence	Witney, United KingdomHQ checked Sep 19, 2026	1-10	29 contacts →
	Strong evidence “INFINITI is a one-stop data centre services provider with an eye for detail and outstanding customer service.” Source: RevenueBase Database · checked Sep 19, 2026
18	Eloquent Technologies Limited	Strong evidence	Stratford Upon Avon, United KingdomHQ checked Sep 19, 2026	11-50	28 contacts →
	Strong evidence “Eloquent operates a range of platforms across various secure data centres in the UK, all of which are connected to our network and serve as the delivery point for our services.” Source: RevenueBase Database · checked Sep 19, 2026
19	Datum Datacentres	Strong evidence	Hampshire, United KingdomHQ checked Sep 19, 2026	11-50	24 contacts →
	Strong evidence “Datum delivers service-enhanced colocation from its network of sustainable, carrier neutral data centres which provide a platform for digital transformation offering flexible…” Source: RevenueBase Database · checked Sep 19, 2026
20	Workspace Technology LTD	Partial evidence	Sutton Coldfield, United KingdomHQ checked Sep 19, 2026	11-50	23 contacts →
	Partial evidence “Workspace Technology Ltd provide expertly engineered Mission Critical Infrastructure, Rack Colocation Hosting and Maintenance & Support Services.” Source: RevenueBase Database · checked Sep 19, 2026
21	Greenscale Data Centres	Strong evidence	London, United KingdomHQ checked Sep 19, 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 19, 2026
22	Global Technical Realty	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	22 contacts →
	Strong evidence “Global Technical Realty (GTR) has the data center experience you need.” Source: RevenueBase Database · checked Sep 19, 2026
23	Custodian Data Centres Data Centre & Network Providers	Partial evidence	Crossways Business Park, United KingdomHQ checked Sep 19, 2026	51-200	21 contacts →
	Partial evidence “At Custodian we’re dedicated to setting a new standard in dynamic, multi-site colocation services.” Source: RevenueBase Database · checked Sep 19, 2026
24	FEL Group LTD	Indirect evidence	Scunthorpe, United KingdomHQ checked Sep 19, 2026	11-50	21 contacts →
	Indirect evidence “Protecting the Heartbeat of British Business'' We create, maintain and manage controlled live environments vital for the operation of thousands of servers at the heart of the UK…” Source: RevenueBase Database · checked Sep 19, 2026
25	HAZ Mission Critical	Indirect evidence	Berkshire, United KingdomHQ checked Sep 19, 2026	51-200	19 contacts →
	Indirect evidence “Haz Mission Critical provides professional Mission Critical support to clients around the world.” 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: colocation data center 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 colocation data center companies.
Partial evidence: Its own public description names part of colocation data center companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name colocation data center 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 166 colocation data center companies based in the United Kingdom

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Colocation data center companies based in the United Kingdom at a glance

As of Sep 19, 2026

44.9%Verified-email coverage

32.1Average contacts per company

11-50Median size (employees)

30.7%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 166 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 colocation data center 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 “colocation data center 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 colocation data center 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 colocation data center 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, 2,393 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.

Colocation data center companies by metro

Colocation data center companies in London51

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

RevenueBase identified 166 colocation data center 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 colocation data center companies?

London leads with 51 headquartered companies, followed by Manchester (7) and Leeds (5).

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 2,393 verified decision-maker contacts tracked across these 166 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.