Company lists · Data refreshed September 2026

Top 25 Commercial consulting firms based in London, United Kingdom

Name: Commercial 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 28, 2026 2,115 companies tracked

RevenueBase identified 2,115 commercial consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 30,080 professional contacts across them, including 13,555 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers commercial consulting firms headquartered in London, 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 28, 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 28, 2026 86% judged on-target in blind review

2,115Companies

30,080Contacts tracked

13,555Verified emails

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

Ranked by team size

Top 25 of 2,115 commercial consulting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to commercial 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	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	10001+	17,070 contacts →
	Indirect 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 28, 2026
2	Baringa	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
3	Oc&c Strategy Consultants	Indirect evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
4	Strategy Insights	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	528 contacts →
	Indirect evidence “Strategy Insights is a specialist business and economic development consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
5	Frontier Economics	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	477 contacts →
	Indirect evidence “We help companies with their biggest challenges – market strategies, regulatory reviews, competition inquiries.” Source: RevenueBase Database · checked Sep 28, 2026
6	Cartesian	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	302 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
7	CIL Strategy Consultants	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	284 contacts →
	Indirect evidence “CIL is a global growth strategy consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
8	Elixirr	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	275 contacts →
	Partial evidence “An award-winning global consulting firm working with clients across a diverse range of markets, industries and geographies.” Source: RevenueBase Database · checked Sep 28, 2026
9	CVL	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	n/a	165 contacts →
	Indirect evidence “Strategic development for already dynamic businesses, successful mergers & acquisitions between household names, technology planning in cutting edge industries and real-world…” Source: RevenueBase Database · checked Sep 28, 2026
10	Athens	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	122 contacts →
	Indirect evidence “Athens helps clients make superior investment decisions and supports them to deliver value from these decisions through timely implementation.” Source: RevenueBase Database · checked Sep 28, 2026
11	Heavenly	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	85 contacts →
	Indirect evidence “Heavenly is a global, independent creative consultancy, founded in 2003.” Source: RevenueBase Database · checked Sep 28, 2026
12	Plural Strategy	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	78 contacts →
	Indirect evidence “Plural Strategy is a strategy consultancy for the media, information and technology industries.” Source: RevenueBase Database · checked Sep 28, 2026
13	Change Management Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	74 contacts →
	Indirect evidence “Whether complex transformation is required across your business or you are seeking support with a small project, we are here to help.” Source: RevenueBase Database · checked Sep 28, 2026
14	Punter Southall	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	72 contacts →
	Indirect evidence “Punter Southall is a group of companies with one aim – helping businesses and people make better decisions.” Source: RevenueBase Database · checked Sep 28, 2026
15	NEW Link Consulting	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	69 contacts →
	Indirect evidence “In complex transformation programmes, risk, regulation, financial crime, data, technology and operations no longer sit in separate silos.” Source: RevenueBase Database · checked Sep 28, 2026
16	Curzon Consulting	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	59 contacts →
	Indirect evidence “An award-winning management consultancy who deliver tangible and enduring results for our clients.” Source: RevenueBase Database · checked Sep 28, 2026
17	Xlr8	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	59 contacts →
	Indirect evidence “Consult us for.” Source: RevenueBase Database · checked Sep 28, 2026
18	Tricon Foodservice Consultants LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	55 contacts →
	Indirect evidence “Tricon is the leading foodservice design and management consultancy across the EMEA region; working in partnership with international companies across all market sectors.” Source: RevenueBase Database · checked Sep 28, 2026
19	Pearson HAM Group The Pricing Specialists	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	49 contacts →
	Partial evidence “Pricing Specialists \| B2B \| B2C \| Pricing Reviews \| Pricing Strategy \| Commercial Models \| Product Bundling \| Price & Promotion Optimisation \| Price Change Delivery \| Pricing…” Source: RevenueBase Database · checked Sep 28, 2026
20	MAN Bites DOG	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	45 contacts →
	Indirect evidence “Man Bites Dog is the Growth Department for Intelligent Brands.” Source: RevenueBase Database · checked Sep 28, 2026
21	Pmsi Strategy	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	45 contacts →
	Strong evidence “PMSI is a management consulting firm specialising in commercial due diligence, market intelligence and strategy consulting.” Source: RevenueBase Database · checked Sep 28, 2026
22	POE Advisory	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	45 contacts →
	Indirect evidence “Three practice areas built for the demands of PE, family offices, asset managers, investors and portfolio businesses.” Source: RevenueBase Database · checked Sep 28, 2026
23	Osborne Partners LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	42 contacts →
	Partial evidence “Osborne Partners is a consulting firm specialising in complex business and legal challenges.” Source: RevenueBase Database · checked Sep 28, 2026
24	EOS Deal Advisory	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	42 contacts →
	Indirect evidence “At EOS Deal Advisory, our focus is to provide our clients with targeted advice that focusses on driving future value, leverages evolving technologies, and ensures operational…” Source: RevenueBase Database · checked Sep 28, 2026
25	BTG Advisory	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	41 contacts →
	Partial evidence “BTG Advisory is a boutique practice providing commercial, strategic and partner-led advice, instructed by companies, investors, lenders and other stakeholders.” Source: RevenueBase Database · checked Sep 28, 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: commercial 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 commercial consulting firms.
Partial evidence: Its own public description names part of commercial consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name commercial 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 25 of 2,115 commercial consulting firms based in London, United Kingdom

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

As of Sep 28, 2026

45.1%Verified-email coverage

14.2Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,692

11-50

327

51-200

201-500

501-1,000

1,001-5,000

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 2,115 companies.

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 commercial 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 London, United Kingdom whose own description of what they do matches “commercial 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 commercial 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 commercial consulting firms, and records with no verified work email. Companies headquartered outside London 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, 13,555 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 28, 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.

Commercial consulting firms by metro in the United Kingdom

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 commercial 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 commercial consulting firms are there based in London, United Kingdom?

RevenueBase identified 2,115 commercial consulting firms headquartered in London, 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 in the United Kingdom has the most commercial consulting firms?

London leads the United Kingdom with 2,115 headquartered companies, followed by Manchester (114) and Birmingham (62).

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 13,555 verified decision-maker contacts tracked across these 2,115 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 28, 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.