Company lists · Data refreshed September 2026

Top 20 IT infrastructure consulting firms based in the United Kingdom

Name: IT infrastructure 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 4, 2026 5,283 companies tracked

RevenueBase identified 5,283 company matches for IT infrastructure consulting firms associated with the United Kingdom as of September 2026 and tracks 226,024 professional contacts across them, including 49,267 with verified work emails and 17,107 with mobile numbers. London is the largest hub.

This list covers company matches for IT infrastructure consulting firms associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. 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 RevenueBase SmartSearch · Exact Recorded Sep 4, 2026 How this list was built

5,283Companies

226,024Contacts tracked

49,267Verified emails

17,107Mobile numbers

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The 20 largest IT infrastructure consulting firms based in the United Kingdom

Ranked by team size

Top 20 of 5,283 company matches for IT infrastructure consulting firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 4, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Softcat	Exact match	Marlow, United KingdomHQ recorded Sep 4, 2026	1,001-5,000	2,873 contacts →
	Exact match “Softcat is a leading provider of IT infrastructure to corporate and public sectors.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
2	Kelly Group	Exact match	Wembley, United KingdomHQ recorded Sep 4, 2026	1,001-5,000	1,059 contacts →
	Exact match “Established in 1985 to support the emerging UK cable television market, Kelly Group has diversified to meet the needs of our clients.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
3	First Derivative	Exact match	Newry, United KingdomHQ recorded Sep 4, 2026	1,001-5,000	1,022 contacts →
	Exact match “First Derivative is driven by people, data, and technology, unlocking the value of insight, hindsight, and foresight to drive organizations forward.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
4	Nasstar	Exact match	Wakefield, United KingdomHQ recorded Sep 4, 2026	1,001-5,000	841 contacts →
	Exact match “Complexity isn’t the enemy.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
5	Claranet	Exact match	London, United KingdomHQ recorded Sep 4, 2026	1,001-5,000	816 contacts →
	Exact match “Claranet modernise and run critical applications and infrastructure.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
6	Bytes Software Services	Exact match	Leatherhead, United KingdomHQ recorded Sep 4, 2026	501-1,000	784 contacts →
	Exact match “Bytes is a leading provider of world-class IT solutions.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
7	TSG	Exact match	Gateshead, United KingdomHQ recorded Sep 4, 2026	201-500	743 contacts →
	Exact match “TSG: The Technology Partner for Ambitious Businesses We're not a reseller.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
8	Exponential-E	Exact match	London, United KingdomHQ recorded Sep 4, 2026	501-1,000	661 contacts →
	Exact match “Innovation is at the core of Exponential-e, and has been since our inception in 2002.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
9	Node4	Exact match	Derby, United KingdomHQ recorded Sep 4, 2026	1,001-5,000	624 contacts →
	Exact match “Node4 helps businesses achieve more with secure, AI‑powered cloud and managed service platforms.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
10	XMA	Exact match	Reading, United KingdomHQ recorded Sep 4, 2026	501-1,000	585 contacts →
	Exact match “Unlock your potential with XMA.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
11	ONNEC	Exact match	London, United KingdomHQ recorded Sep 4, 2026	501-1,000	580 contacts →
	Exact match “Onnec is a leading partner for IT Infrastructure design, installation and operational support services.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
12	Redstone Converged Solutions	Exact match	London, United KingdomHQ recorded Sep 4, 2026	201-500	452 contacts →
	Exact match “Redstone is now part of RedstoneConnect PLC.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
13	Trustmarque	Exact match	York, United KingdomHQ recorded Sep 4, 2026	501-1,000	422 contacts →
	Exact match “Trustmarque delivers the value of technology to bring real-life impact.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
14	ACORA	Exact match	Burgess Hill, United KingdomHQ recorded Sep 4, 2026	501-1,000	421 contacts →
	Exact match “We’ve been on a mission to bring together people and technology since the day we were founded over 25 years ago.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
15	Zenzero	Exact match	London, United KingdomHQ recorded Sep 4, 2026	501-1,000	403 contacts →
	Exact match “We believe successful businesses are underpinned by quality IT infrastructure.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
16	CCS Media Limited Advania UK	Exact match	Chesterfield, United KingdomHQ recorded Sep 4, 2026	201-500	374 contacts →
	Exact match “CCS Media is now officially part of Advania UK, the tech company with people at heart.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
17	Maintel	Exact match	London, United KingdomHQ recorded Sep 4, 2026	201-500	361 contacts →
	Exact match “Maintel is a communications managed services provider.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
18	CHESS	Exact match	Alderley Edge, United KingdomHQ recorded Sep 4, 2026	201-500	340 contacts →
	Exact match “Chess ICT is the UKs leading independent technology service provider, employing more than 240 people across the UK and supporting over customers.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
19	prosource.it	Exact match	Aberdeen, United KingdomHQ recorded Sep 4, 2026	501-1,000	326 contacts →
	Exact match “prosource.it is a managed IT services provider with a particular focus on infrastructure, operational and project requirements across the corporate enterprise market.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
20	Bridewell	Exact match	Reading, United KingdomHQ recorded Sep 4, 2026	201-500	304 contacts →
	Exact match “Bridewell is the trusted cyber security partner for organisations operating within Critical National Infrastructure (CNI), as well as companies who want the highest standard of…” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “IT infrastructure consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 20 of 5,283 IT infrastructure consulting firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 49,267 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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IT infrastructure consulting firms based in the United Kingdom at a glance

As of Sep 4, 2026

21.8%Verified-email coverage

7.6%Mobile-number coverage

42.8Average contacts per company

1-10Median size (employees)

31.6%Largest-city concentration · London

Sep 4, 2026Page data refreshed

Companies by employee count

1-10

3,160

11-50

1,455

51-200

409

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

4,45931–60

26,83561–90

17,76490–180

209180+

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with the United Kingdom whose business descriptions match “IT infrastructure consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 49,267 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

IT infrastructure consulting firms by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “IT infrastructure consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many IT infrastructure consulting firms are there based in the United Kingdom?

RevenueBase identified 5,283 company matches for IT infrastructure consulting firms associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Softcat tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most IT infrastructure consulting firms?

London leads with 1672 company records, followed by Manchester (115) and Birmingham (81).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 49,267 professional contacts with verified work emails tracked across these 5,283 companies; direct dials are available where recorded.

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.

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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 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.