Company lists · Data refreshed September 2026

Top 25 Transformation consulting firms based in London, United Kingdom

Name: Transformation consulting firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 4,319 companies tracked

RevenueBase identified 4,319 company matches for transformation consulting firms associated with London, United Kingdom as of September 2026 and tracks 88,929 professional contacts across them, including 39,963 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for transformation consulting firms associated with London, 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 6, 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 6, 2026 How this list was built

4,319Companies

88,929Contacts tracked

39,963Verified emails

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The 25 largest transformation consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 4,319 company matches for transformation consulting firms based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 6, 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-Parthenon	Exact match	London, United KingdomHQ recorded Sep 6, 2026	10001+	17,070 contacts →
	Exact match “Our unique combination of transformative strategy, transactions and corporate finance delivers real-world value – solutions that work in practice, not just on paper.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
2	Endava	Exact match	London, United KingdomHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
3	CAPCO	Exact match	London, United KingdomHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
4	Baringa	Exact match	London, United KingdomHQ recorded Sep 6, 2026	1,001-5,000	2,179 contacts →
	Exact match “Baringa is a global consulting firm that helps leaders drive meaningful change and create value.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
5	Efficio	Exact match	London, United KingdomHQ recorded Sep 6, 2026	1,001-5,000	1,304 contacts →
	Exact match “Efficio is a global leader in procurement and supply chain management and transformation.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
6	Equal Experts	Exact match	London, United KingdomHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
7	Oc&c Strategy Consultants	Exact match	London, United KingdomHQ recorded Sep 6, 2026	501-1,000	1,011 contacts →
	Exact match “At OC & C Strategy Consultants we have more than 35 years of experience at unpicking the most complex business challenges with simple, uncommon sense™.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
8	VML Enterprise Solutions	Exact match	London, United KingdomHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
9	Hitachi Solutions UK	Exact match	London, United KingdomHQ recorded Sep 6, 2026	501-1,000	422 contacts →
	Exact match “Our team of world-class professionals across the globe work together to innovate and enable sustainable business transformation.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
10	Zenitech	Exact match	London, United KingdomHQ recorded Sep 6, 2026	501-1,000	408 contacts →
	Exact match “Zenitech creates technology to transform businesses.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
11	KIN Carta	Exact match	London, United KingdomHQ recorded Sep 6, 2026	5,001-10,000	400 contacts →
	Exact match “Kin + Carta was acquired by Valtech in 2024.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
12	LA Fosse	Exact match	London, United KingdomHQ recorded Sep 6, 2026	201-500	396 contacts →
	Exact match “La Fosse: Empowering people and businesses to thrive in a tech-driven world We are La Fosse.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
13	Merkle Emea	Exact match	London, United KingdomHQ recorded Sep 6, 2026	5,001-10,000	368 contacts →
	Exact match “Merkle, a dentsu company, powers the experience economy.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
14	Sandhata Technologies	Exact match	London, United KingdomHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
15	Softwire	Exact match	London, United KingdomHQ recorded Sep 6, 2026	201-500	360 contacts →
	Exact match “Softwire exists to help organisations use technology to deliver meaningful outcomes and a positive impact for themselves, their users and the world.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
16	Emergn	Exact match	London, United KingdomHQ recorded Sep 6, 2026	501-1,000	351 contacts →
	Exact match “Emergn is a global technology and management consultancy built on a simple conviction: the only sustainable competitive advantage is the way you work.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
17	Davies	Exact match	London, United KingdomHQ recorded Sep 6, 2026	5,001-10,000	329 contacts →
	Exact match “We are the global consulting division of Davies, accelerating business, technology and people performance across financial services including Retail Finance & Corporate Banking…” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
18	Solirius Reply	Exact match	London, United KingdomHQ recorded Sep 6, 2026	51-200	305 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
19	Cartesian	Exact match	London, United KingdomHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
20	WCL	Exact match	London, United KingdomHQ recorded Sep 6, 2026	n/a	281 contacts →
	Exact match “WCL specialises in change and transformation management and has worked extensively with nearly all UK Government Departments, as well as many private sector clients, on planning…” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
21	Elixirr	Exact match	London, United KingdomHQ recorded Sep 6, 2026	501-1,000	275 contacts →
	Exact match “An award-winning global consulting firm working with clients across a diverse range of markets, industries and geographies.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
22	Devtech	Exact match	London, United KingdomHQ recorded Sep 6, 2026	201-500	266 contacts →
	Exact match “Devtech provides outcome-driven digital innovation services and helps companies better respond to change.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
23	Transform	Exact match	London, United KingdomHQ recorded Sep 6, 2026	201-500	255 contacts →
	Exact match “Transform is a fresh alternative to Big Consulting.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
24	The Adaptavist Group	Exact match	London, United KingdomHQ recorded Sep 6, 2026	1,001-5,000	254 contacts →
	Exact match “We are experts at delivering innovative software, tailored solutions, and quality services across some of the world's most trusted technology ecosystems, including Atlassian, AWS…” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
25	Orgvue	Exact match	London, United KingdomHQ recorded Sep 6, 2026	201-500	248 contacts →
	Exact match “Workforce decisions matter.” Recorded in the RevenueBase company graph · Sep 6, 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 “transformation 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 4,319 transformation consulting firms based in London, United Kingdom

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Transformation consulting firms based in London, United Kingdom at a glance

As of Sep 6, 2026

44.9%Verified-email coverage

20.6Average contacts per company

1-10Median size (employees)

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

3,029

11-50

870

51-200

278

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 4,319 companies.

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 London, United Kingdom whose business descriptions match “transformation 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 39,963 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 6, 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.

Transformation consulting firms by metro in the United Kingdom

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 “transformation consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many transformation consulting firms are there based in London, United Kingdom?

RevenueBase identified 4,319 company matches for transformation consulting firms associated with London, 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-Parthenon tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United Kingdom has the most transformation consulting firms?

London leads the United Kingdom with 4,319 company records, followed by Manchester (240) and Bristol (148).

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 39,963 professional contacts with verified work emails tracked across these 4,319 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 6, 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.