Company lists · Data refreshed September 2026

Top 23 Business transformation consulting firms based in the United Kingdom

Name: Business transformation 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 23, 2026 7,375 companies tracked

RevenueBase identified 7,375 business transformation consulting firms headquartered in the United Kingdom as of September 2026 and tracks 108,620 professional contacts across them, including 45,795 with verified work emails and 9,670 with mobile numbers. London is the largest hub.

This list covers business transformation 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 23, 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 23, 2026 86% judged on-target in blind review

7,375Companies

108,620Contacts tracked

45,795Verified emails

9,670Mobile numbers

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The 23 largest business transformation consulting firms based in the United Kingdom

Ranked by team size

Top 23 of 7,375 business transformation consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to business transformation 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	Ey-Parthenon	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	10001+	17,070 contacts →
	Partial evidence “Our unique combination of transformative strategy, transactions and corporate finance delivers real-world value – solutions that work in practice, not just on paper.” Source: RevenueBase Database · checked Sep 23, 2026
2	Endava	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	10001+	9,653 contacts →
	Indirect evidence “For over two decades, we have been harnessing technology to drive meaningful change.” Source: RevenueBase Database · checked Sep 23, 2026
3	CAPCO	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	5,001-10,000	7,396 contacts →
	Partial evidence “Capco, a Wipro company, is a global technology and management consultancy specializing in driving digital transformation in the financial services industry.” Source: RevenueBase Database · checked Sep 23, 2026
4	Accenture UK & Ireland	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	5,001-10,000	3,720 contacts →
	Indirect evidence “Accenture helps the world’s leading enterprises reinvent by building their digital core and unleashing the power of AI to create value at speed for organisations across industries.” Source: RevenueBase Database · checked Sep 23, 2026
5	Baringa	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	1,001-5,000	2,179 contacts →
	Partial evidence “Baringa is a global consulting firm that helps leaders drive meaningful change and create value.” Source: RevenueBase Database · checked Sep 23, 2026
6	Equal Experts	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	1,001-5,000	1,172 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 23, 2026
7	Oc&c Strategy Consultants	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	501-1,000	1,011 contacts →
	Indirect evidence “At OC & C Strategy Consultants we have more than 35 years of experience at unpicking the most complex business challenges with simple, uncommon sense™.” Source: RevenueBase Database · checked Sep 23, 2026
8	VML Enterprise Solutions	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	5,001-10,000	697 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 23, 2026
9	Cennox	Partial evidence	Camberley, United KingdomHQ checked Sep 23, 2026	1,001-5,000	610 contacts →
	Partial evidence “Cennox help the world’s leading brands to execute and deliver their complex change programs across technology, security and facility transformation.” Source: RevenueBase Database · checked Sep 23, 2026
10	Lemongrass	Indirect evidence	Reading, United KingdomHQ checked Sep 23, 2026	501-1,000	504 contacts →
	Indirect evidence “Lemongrass is a global SAP-focused cloud services provider focused on enabling Enterprises to turn SAP into a strategic advantage.” Source: RevenueBase Database · checked Sep 23, 2026
11	Infinity Quest	Indirect evidence	Solihull, United KingdomHQ checked Sep 23, 2026	201-500	446 contacts →
	Indirect evidence “Infinity Quest (IQ) is an AI and data engineering consultancy.” Source: RevenueBase Database · checked Sep 23, 2026
12	Hitachi Solutions UK	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	501-1,000	422 contacts →
	Partial evidence “Our team of world-class professionals across the globe work together to innovate and enable sustainable business transformation.” Source: RevenueBase Database · checked Sep 23, 2026
13	Zenitech	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	501-1,000	408 contacts →
	Indirect evidence “Zenitech creates technology to transform businesses.” Source: RevenueBase Database · checked Sep 23, 2026
14	Merkle Emea	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	5,001-10,000	368 contacts →
	Indirect evidence “Merkle, a dentsu company, powers the experience economy.” Source: RevenueBase Database · checked Sep 23, 2026
15	FSP	Partial evidence	Reading, United KingdomHQ checked Sep 23, 2026	201-500	366 contacts →
	Partial evidence “FSP is a leading consultancy specialising in Data and AI, Cyber Security, Enterprise Cloud and Change Delivery, providing advisory led enterprise transformation delivered through…” Source: RevenueBase Database · checked Sep 23, 2026
16	Sandhata Technologies	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	363 contacts →
	Partial evidence “We are a global niche consultancy specialising in services that span all facets of Digital transformation, DevOps, and System Integration.” Source: RevenueBase Database · checked Sep 23, 2026
17	Softwire	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	360 contacts →
	Indirect evidence “Softwire exists to help organisations use technology to deliver meaningful outcomes and a positive impact for themselves, their users and the world.” Source: RevenueBase Database · checked Sep 23, 2026
18	Emergn	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	501-1,000	351 contacts →
	Indirect evidence “Emergn is a global technology and management consultancy built on a simple conviction: the only sustainable competitive advantage is the way you work.” Source: RevenueBase Database · checked Sep 23, 2026
19	Delaware United Kingdom & Ireland	Indirect evidence	Bristol, United KingdomHQ checked Sep 23, 2026	1,001-5,000	348 contacts →
	Indirect evidence “Our mission is to help our clients reach their full potential, by applying our common sense, business experience and passion for technology.” Source: RevenueBase Database · checked Sep 23, 2026
20	Q5	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	501-1,000	344 contacts →
	Indirect evidence “Q5 is a global, award-winning management consultancy focused on building healthy, high-performing organisations.” Source: RevenueBase Database · checked Sep 23, 2026
21	Davies	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	5,001-10,000	329 contacts →
	Partial evidence “We are the global consulting division of Davies, accelerating business, technology and people performance across financial services including Retail Finance & Corporate Banking…” Source: RevenueBase Database · checked Sep 23, 2026
22	Reliance Infosystems	Indirect evidence	West End, United KingdomHQ checked Sep 23, 2026	201-500	326 contacts →
	Indirect evidence “As our name suggests, our customers rely on us in providing suitable technology inputs to support their business goals.” Source: RevenueBase Database · checked Sep 23, 2026
23	Solirius Reply	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	51-200	305 contacts →
	Partial evidence “We are digital transformation specialists, on a mission to make our society an easier and more equitable place for people to live, work and thrive.” Source: RevenueBase Database · checked Sep 23, 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: business transformation 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 business transformation consulting firms.
Partial evidence: Its own public description names part of business transformation consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name business transformation 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 23 of 7,375 business transformation consulting firms based in the United Kingdom

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Business transformation consulting firms based in the United Kingdom at a glance

As of Sep 23, 2026

42.2%Verified-email coverage

8.9%Mobile-number coverage

14.7Average contacts per company

1-10Median size (employees)

41.3%Largest-city concentration · London

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

5,591

11-50

1,208

51-200

382

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 25.0d

34,1010–30

10,70231–60

65361–90

4290–180

297180+

Company record updated

Median 74.0d

00–30

23,25331–60

55,07361–90

23,94690–180

6,348180+

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 business transformation 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 “business transformation 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 business transformation 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 business transformation 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, 45,795 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 23, 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.

Business transformation consulting firms by metro

Business transformation consulting firms in London3047
Business transformation consulting firms in Manchester149
Business transformation consulting firms in Bristol88
Business transformation consulting firms in Leeds87
Business transformation consulting firms in Birmingham85
Business transformation consulting firms in Glasgow85
Business transformation consulting firms in Edinburgh79
Business transformation consulting firms in Reading59
Business transformation consulting firms in Cambridge54
Business transformation consulting firms in Milton Keynes52
Business transformation consulting firms in Oxford46
Business transformation consulting firms in Sheffield42
Business transformation consulting firms in Liverpool39
Business transformation consulting firms in Cardiff36
Business transformation consulting firms in Brighton33
Business transformation consulting firms in Bath29
Business transformation consulting firms in Cheltenham29
Business transformation consulting firms in Nottingham29
Business transformation consulting firms in Southampton28
Business transformation consulting firms in York28
Business transformation consulting firms in Leicester27
Business transformation consulting firms in Coventry25
Business transformation consulting firms in Guildford25

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 business transformation 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 business transformation consulting firms are there based in the United Kingdom?

RevenueBase identified 7,375 business transformation 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?

Ey-Parthenon, headquartered in London, tops this list with the largest team on record.

Which city has the most business transformation consulting firms?

London leads with 3047 headquartered companies, followed by Manchester (149) and Bristol (88).

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 45,795 verified decision-maker contacts tracked across these 7,375 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 23, 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.