Company lists · Data refreshed September 2026

Top 25 IT advisory consulting firms based in the United Kingdom

Name: IT advisory 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 26, 2026 4,669 companies tracked

RevenueBase identified 4,669 company matches for IT advisory consulting firms associated with the United Kingdom as of September 2026 and tracks 463,676 professional contacts across them, including 168,279 with verified work emails and 43,396 with mobile numbers. London is the largest hub.

This list covers company matches for IT advisory 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 26, 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 26, 2026 How this list was built

4,669Companies

463,676Contacts tracked

168,279Verified emails

43,396Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest IT advisory consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 4,669 company matches for IT advisory consulting firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 26, 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	EY	Exact match	London, United KingdomHQ recorded Sep 26, 2026	10001+	375,085 contacts →
	Exact match “EY is building a better working world by creating new value for clients, people, society, the planet, while building trust in the capital markets.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
2	Kpmg UK	Exact match	London, United KingdomHQ recorded Sep 26, 2026	10001+	14,509 contacts →
	Exact match “Make growth happen.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
3	Endava	Exact match	London, United KingdomHQ recorded Sep 26, 2026	10001+	9,653 contacts →
	Exact match “For over two decades, we have been harnessing technology to drive meaningful change.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
4	CAPCO	Exact match	London, United KingdomHQ recorded Sep 26, 2026	5,001-10,000	7,396 contacts →
	Exact match “Capco, a Wipro company, is a global technology and management consultancy specializing in driving digital transformation in the financial services industry.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
5	Noventiq	Exact match	London, United KingdomHQ recorded Sep 26, 2026	5,001-10,000	1,508 contacts →
	Exact match “Noventiq (Noventiq Holdings PLC) is a leading global solutions and services provider in digital transformation and cybersecurity, headquartered in London.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
6	Crowe UK	Exact match	London, United KingdomHQ recorded Sep 26, 2026	1,001-5,000	1,395 contacts →
	Exact match “Crowe UK is a leading audit, tax, advisory and consulting firm with a national presence to complement our international reach.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
7	Equal Experts	Exact match	London, United KingdomHQ recorded Sep 26, 2026	1,001-5,000	1,172 contacts →
	Exact match “We are honoured to be recognised as one of the Top 10 Best Places to Work in the UK for the third year running, according to Glassdoor’s prestigious 2026 list.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
8	Moore Kingston Smith	Exact match	London, United KingdomHQ recorded Sep 26, 2026	501-1,000	1,151 contacts →
	Exact match “At Moore Kingston Smith, we believe in the potential of people to make a positive impact, fuelled by the power of genuine understanding.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
9	First Derivative	Exact match	Newry, United KingdomHQ recorded Sep 26, 2026	1,001-5,000	988 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 26, 2026 · View company records in RevenueBase
10	MTI	Exact match	Staines-upon-thames, United KingdomHQ recorded Sep 26, 2026	201-500	764 contacts →
	Exact match “MTI provides award-winning, end-to-end technology solutions and services in cyber security and data centre for over 35 years.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
11	PKF Littlejohn	Exact match	London, United KingdomHQ recorded Sep 26, 2026	501-1,000	702 contacts →
	Exact match “We are a fast-growing firm of accountants and business advisers based in London’s Canary Wharf, Leeds and in Manchester.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
12	VML Enterprise Solutions	Exact match	London, United KingdomHQ recorded Sep 26, 2026	5,001-10,000	697 contacts →
	Exact match “Follow us now at WPP Enterprise Solutions, WPP’s global business transformation unit, designing, building and operating the growth systems that competitive businesses rely on.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
13	Systal Technology Solutions	Exact match	Glasgow, United KingdomHQ recorded Sep 26, 2026	501-1,000	647 contacts →
	Exact match “Systal is a global managed network, cloud and security transformation specialist.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
14	Dimension Data UKI	Exact match	Fleet, United KingdomHQ recorded Sep 26, 2026	1,001-5,000	540 contacts →
	Exact match “Dimension Data uses the power of technology to help organisations achieve great things.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
15	Mazars In The UK	Exact match	London, United KingdomHQ recorded Sep 26, 2026	1,001-5,000	505 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
16	ACORA	Exact match	Burgess Hill, United KingdomHQ recorded Sep 26, 2026	501-1,000	423 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 26, 2026 · View company records in RevenueBase
17	Trustmarque	Exact match	York, United KingdomHQ recorded Sep 26, 2026	501-1,000	421 contacts →
	Exact match “Trustmarque delivers the value of technology to bring real-life impact.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
18	Zenitech	Exact match	London, United KingdomHQ recorded Sep 26, 2026	501-1,000	408 contacts →
	Exact match “Zenitech creates technology to transform businesses.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
19	KIN Carta	Exact match	London, United KingdomHQ recorded Sep 26, 2026	5,001-10,000	400 contacts →
	Exact match “Kin + Carta was acquired by Valtech in 2024.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
20	FSP	Exact match	Reading, United KingdomHQ recorded Sep 26, 2026	201-500	366 contacts →
	Exact match “FSP is a leading consultancy specialising in Data and AI, Cyber Security, Enterprise Cloud and Change Delivery, providing advisory led enterprise transformation delivered through…” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
21	Sandhata Technologies	Exact match	London, United KingdomHQ recorded Sep 26, 2026	201-500	363 contacts →
	Exact match “We are a global niche consultancy specialising in services that span all facets of Digital transformation, DevOps, and System Integration.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
22	Delaware United Kingdom & Ireland	Exact match	Bristol, United KingdomHQ recorded Sep 26, 2026	1,001-5,000	348 contacts →
	Exact match “Our mission is to help our clients reach their full potential, by applying our common sense, business experience and passion for technology.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
23	Reliance Infosystems	Exact match	West End, United KingdomHQ recorded Sep 26, 2026	201-500	326 contacts →
	Exact match “As our name suggests, our customers rely on us in providing suitable technology inputs to support their business goals.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
24	Mitra AI	Exact match	London, United KingdomHQ recorded Sep 26, 2026	201-500	314 contacts →
	Exact match “Revolutionize your applications with Al and data, modernizing cloud solutions to enhance customer experience.” Recorded in the RevenueBase company graph · Sep 26, 2026 · View company records in RevenueBase
25	Cartesian	Exact match	London, United KingdomHQ recorded Sep 26, 2026	201-500	302 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 26, 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 advisory 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 25 of 4,669 IT advisory consulting firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 168,279 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

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

As of Sep 26, 2026

36.3%Verified-email coverage

9.4%Mobile-number coverage

99.3Average contacts per company

1-10Median size (employees)

40.9%Largest-city concentration · London

Sep 26, 2026Page data refreshed

Companies by employee count

1-10

3,211

11-50

963

51-200

318

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

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

Email last verified

Median 29.0d

105,3630–30

57,94431–60

2,81361–90

27290–180

1,887180+

Company record updated

Median 75.0d

00–30

77,38931–60

215,06461–90

140,64690–180

30,577180+

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 advisory 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 168,279 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 26, 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 advisory 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 advisory consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 4,669 company matches for IT advisory 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?

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

Which city has the most IT advisory consulting firms?

London leads with 1910 company records, followed by Manchester (109) and Bristol (59).

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 168,279 professional contacts with verified work emails tracked across these 4,669 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 26, 2026.

Ready to reach these companies? Verified emails and direct dials for all 4,669 IT advisory consulting firms based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

IT advisory consulting firms by geography

Browse the directory

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.