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Company lists · Data refreshed September 2026

Top 23 IT managed service providers based in the United Kingdom

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 1,936 companies tracked

RevenueBase identified 1,936 IT managed service providers headquartered in the United Kingdom as of September 2026 and tracks 24,928 professional contacts across them, including 11,023 with verified work emails and 1,627 with mobile numbers. London is the largest hub.

This list covers IT managed service providers 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review
1,936Companies
24,928Contacts tracked
11,023Verified emails
1,627Mobile numbers
Unlock all 1,936 companies Free signup · no credit card · 500 free credits

The 23 largest IT managed service providers based in the United Kingdom

Ranked by team size
Top 23 of 1,936 IT managed service providers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names IT managed service providers: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
LogicalisIndirect evidence
Maidenhead, United KingdomHQ checked Sep 4, 20265,001-10,0001,368

“We are Architects of Change™.”

Source: company website · checked Sep 4, 2026
2
NasstarIndirect evidence
Wakefield, United KingdomHQ checked Sep 4, 20261,001-5,000841

“Complexity isn’t the enemy.”

Source: company website · checked Sep 4, 2026
3
ClaranetIndirect evidence
London, United KingdomHQ checked Sep 4, 20261,001-5,000816

“Claranet modernise and run critical applications and infrastructure.”

Source: company website · checked Sep 4, 2026
4
RedcentricIndirect evidence
Harrogate, United KingdomHQ checked Sep 4, 2026201-500565

“Redcentric partners with over organisations across the UK to solve complex technology challenges.”

Source: company website · checked Sep 4, 2026
5
AIR IT GroupPartial evidence
Nottingham, United KingdomHQ checked Sep 4, 2026501-1,000378

“Air IT Group aligns technology with your business priorities to deliver outcomes that matter.”

Source: company website · checked Sep 4, 2026
6
LittlefishStrong evidence
Nottingham, United KingdomHQ checked Sep 4, 2026201-500372

“Littlefish is a multi-award-winning Managed IT Services Provider that continues to grow consistently and significantly through tangibly delivering on our promises of enhanced user…”

Source: company website · checked Sep 4, 2026
7
MaintelPartial evidence
London, United KingdomHQ checked Sep 4, 2026201-500361

“Maintel is a communications managed services provider.”

Source: company website · checked Sep 4, 2026
8
BOXXEStrong evidence
Hemel Hempstead, United KingdomHQ checked Sep 4, 2026201-500289

“boxxe is a leading provider of hardware, software, and managed IT services for public and private sector organisations.”

Source: company website · checked Sep 4, 2026
9
Aspire Technology SolutionsIndirect evidence
Gateshead, United KingdomHQ checked Sep 4, 2026201-500264

“Welcome to Aspire Technology Solutions!”

Source: company website · checked Sep 4, 2026
10
WanstorStrong evidence
London, United KingdomHQ checked Sep 4, 2026201-500226

“Wanstor: Experience First | AI Fluent | Secure by Default Wanstor is a trusted Managed IT Services company that helps ambitious organisations leverage technology to achieve better…”

Source: company website · checked Sep 4, 2026
11
Creative ITCStrong evidence
London, United KingdomHQ checked Sep 4, 2026201-500175

“Creative ITC is a global cloud and managed services provider built for complex design, engineering, and business critical IT environments.”

Source: company website · checked Sep 4, 2026
12
CSI LTD A CSI Group CompanyStrong evidence
Birmingham, United KingdomHQ checked Sep 4, 2026201-500161

“CSI, A Park Place Technologies Company, is an IT Managed Services Provider bringing world-class Hybrid Multi-Cloud, Data Protection, and Cyber Security solutions to our clients’…”

Source: company website · checked Sep 4, 2026
13
Transputec LTDPartial evidence
London, United KingdomHQ checked Sep 4, 202651-200154

“Transputec is an award-winning IT services and solutions provider with over 35 years of experience helping organisations thrive through technology.”

Source: company website · checked Sep 4, 2026
14
EspriaIndirect evidence
Ware, United KingdomHQ checked Sep 4, 202651-200148

“Welcome to Espria.”

Source: company website · checked Sep 4, 2026
15
UptimeIndirect evidence
Three Bridges, United KingdomHQ checked Sep 4, 202651-200143

“Uptime is the leading choice for MSPs across the globe looking to extend the services they offer to clients while simultaneously building recurring revenue.”

Source: company website · checked Sep 4, 2026
16
Deepscale Technologies LTDStrong evidence
London, United KingdomHQ checked Sep 4, 202651-200143

“Deepscale Technologies provide data center, enterprise & managed IT solutions across the globe that enhance how businesses operate.”

Source: company website · checked Sep 4, 2026
17
Global 4Partial evidence
Horsham, United KingdomHQ checked Sep 4, 202651-200134

“Global 4 is one of the UK’s most effective independent managed service providers supporting businesses of all shapes and sizes all over the UK from our head office, based in…”

Source: company website · checked Sep 4, 2026
18
Razorblue GroupStrong evidence
Stockton-on-tees, United KingdomHQ checked Sep 4, 2026201-500129

“razorblue is a people-focused managed IT partner, committed to helping businesses grow, adapt and succeed through technology.”

Source: company website · checked Sep 4, 2026
19
Khipu NetworksIndirect evidence
Fleet, United KingdomHQ checked Sep 4, 202651-200129

“KHIPU Networks is an award winning international Cyber Security Company delivering a wide range of network, wireless and security solutions, technologies and services across…”

Source: company website · checked Sep 4, 2026
20
Central TechnologyStrong evidence
Chesterfield, United KingdomHQ checked Sep 4, 202651-200124

“Central Technology provides a partnership approach to IT solutions, offering Managed IT Support, Cloud, Cyber Security and Telecom Solutions to make a real difference and help…”

Source: company website · checked Sep 4, 2026
21
Tailor Made TechnologiesStrong evidence
Whiteley, United KingdomHQ checked Sep 4, 202651-200120

“Tailor Made Technologies (TMT) are experts in managed IT, cyber security, and communication solutions, TMT is on a mission to help small and medium-sized enterprises leverage…”

Source: company website · checked Sep 4, 2026
22
TDM GroupStrong evidence
London, United KingdomHQ checked Sep 4, 202651-200116

“TDM Group Ltd is a global Managed Business IT Service (M-BiTS) provider – our holistic approach to managing and implementing IT considers the impact technology has on the entire…”

Source: company website · checked Sep 4, 2026
23
Core Technology SystemsPartial evidence
London, United KingdomHQ checked Sep 4, 202651-200106

“Core is a managed services company for people and businesses who want to realise modern workplace technology solutions to drive their business forward.”

Source: company website · checked Sep 4, 2026

Showing 23 of 1,936 IT managed service providers based in the United Kingdom

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IT managed service providers based in the United Kingdom at a glance

As of Sep 4, 2026
1-10Median size (employees)
LondonLargest hub · 420 HQs
1,627Contacts with mobile numbers
Sep 4, 2026Data refreshed

Companies by employee count

1-10
1,030
11-50
672
51-200
146
201-500
33
501-1,000
4
1,001-5,000
5
5,001-10,000
1
10001+
1

Verified emails by last verification

0–30
0
31–60
896
61–90
6,010
90–180
4,070
180+
47

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 IT managed service providers, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “IT managed service providers”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among IT managed service providers, 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 an evidence 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, 11,023 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 4, 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.

IT managed service providers by metro

Frequently asked

How many IT managed service providers are there based in the United Kingdom?

RevenueBase identified 1,936 IT managed service providers 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?

Logicalis, headquartered in Maidenhead, tops this list with the largest team on record.

Which city has the most IT managed service providers?

London leads with 420 headquartered companies, followed by Manchester (32) and Birmingham (26).

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 11,023 verified decision-maker contacts tracked across these 1,936 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 4, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,936 IT managed service providers based in the United Kingdom. Start with a free account, no credit card.

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Related lists

Browse: Companies home · All United Kingdom lists · All IT managed service providers lists · New lists

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 SmartSearch, 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.

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