Company lists · Data refreshed September 2026

Top 25 Boutique consulting firms based in the United Kingdom

Name: Boutique 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 7,818 companies tracked

RevenueBase identified 7,818 company matches for boutique consulting firms associated with the United Kingdom as of September 2026 and tracks 68,910 professional contacts across them, including 26,714 with verified work emails and 6,517 with mobile numbers. London is the largest hub.

This list covers company matches for boutique 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 23, 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 23, 2026 How this list was built

7,818Companies

68,910Contacts tracked

26,714Verified emails

6,517Mobile numbers

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The 25 largest boutique consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 7,818 company matches for boutique consulting firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 23, 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 23, 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 23, 2026 · View company records in RevenueBase
2	MACE	Exact match	London, United KingdomHQ recorded Sep 23, 2026	5,001-10,000	8,458 contacts →
	Exact match “Mace Consult launched as a new and independent business on 5 March 2026, through a carve-out from Mace Group.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
3	Baringa	Exact match	London, United KingdomHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
4	Oc&c Strategy Consultants	Exact match	London, United KingdomHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
5	Strategy Insights	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	528 contacts →
	Exact match “Strategy Insights is a specialist business and economic development consultancy.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
6	Q5	Exact match	London, United KingdomHQ recorded Sep 23, 2026	501-1,000	344 contacts →
	Exact match “Q5 is a global, award-winning management consultancy focused on building healthy, high-performing organisations.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
7	Mercer UK	Exact match	London, United KingdomHQ recorded Sep 23, 2026	10001+	329 contacts →
	Exact match “At Mercer, A Marsh business, we’re helping our clients realize their investment objectives, shape the future of work, and enhance health and retirement outcomes for their people.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
8	Quantuma	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	277 contacts →
	Exact match “Quantuma is a leading business advisory firm which works with businesses at the key milestones.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
9	Elixirr	Exact match	London, United KingdomHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
10	Moorhouse B Corp Certified	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	247 contacts →
	Exact match “We’re a dynamic consulting firm, focused on delivering change.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
11	Albany Beck	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	240 contacts →
	Exact match “Albany Beck is a client-first consulting firm helping financial services organisations deliver complex change and build capability, not dependency.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
12	OIM	Exact match	Bath, United KingdomHQ recorded Sep 23, 2026	n/a	198 contacts →
	Exact match “OIM is dedicated to building competitive organisations.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
13	True North Partners	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	185 contacts →
	Exact match “True North Partners LLP is an independent consulting firm based in London, Johannesburg, Frankfurt, Amsterdam and Madrid.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
14	TXM Consult	Exact match	Milton Keynes, United KingdomHQ recorded Sep 23, 2026	51-200	166 contacts →
	Exact match “In an uncertain, complex, and ambiguous world, business change is essential and inevitable.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
15	The Berkeley Partnership	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	152 contacts →
	Exact match “Founded in 1990, The Berkeley Partnership is an independent management consultancy, specialising in business transformation.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
16	Opus Business Advisory Group	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	144 contacts →
	Exact match “Opus Business Advisory Group is an independent advisory firm that assists clients to achieve their objectives, enhance value and attain the best possible results.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
17	Sysdoc	Exact match	London (uk), United KingdomHQ recorded Sep 23, 2026	51-200	142 contacts →
	Exact match “At Sysdoc we exist to help our clients to transform, adapt and operate in order for them to achieve their ambitions, and to provide our own people with opportunities that allow…” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
18	ORG	Exact match	London, United KingdomHQ recorded Sep 23, 2026	1,001-5,000	139 contacts →
	Exact match “We believe that change is an opportunity to thrive.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
19	Veran Performance	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	134 contacts →
	Exact match “Winners of the UKOUG Business Transformation Advisory Partner of the Year Award 2025 Veran Performance is an advisory consultancy specialising in HR, Payroll, Procurement and…” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
20	Liqueo	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	123 contacts →
	Exact match “Specialists in change and transformation across asset, wealth and insurance.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
21	Athens	Exact match	London, United KingdomHQ recorded Sep 23, 2026	11-50	122 contacts →
	Exact match “Athens helps clients make superior investment decisions and supports them to deliver value from these decisions through timely implementation.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
22	Oaklin	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	115 contacts →
	Exact match “Oaklin is an independent management consultancy.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
23	Redrock Consulting	Exact match	Bristol, United KingdomHQ recorded Sep 23, 2026	51-200	115 contacts →
	Exact match “We are RedRock, a trusted delivery partner for digital, data and technology transformation.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
24	The JPP Group	Exact match	Northampton, United KingdomHQ recorded Sep 23, 2026	51-200	99 contacts →
	Exact match “Established in 1973, JPP has steadily grown to become a consultancy that offers a broad range of services to a diverse client base.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
25	Fenchurch Advisory Partners	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	98 contacts →
	Exact match “Fenchurch Advisory Partners is one of the leading independent corporate finance advisory firms in London.” Recorded in the RevenueBase company graph · Sep 23, 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 “boutique 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 7,818 boutique consulting firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 26,714 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Boutique consulting firms based in the United Kingdom at a glance

As of Sep 23, 2026

38.8%Verified-email coverage

9.5%Mobile-number coverage

8.8Average contacts per company

1-10Median size (employees)

38.9%Largest-city concentration · London

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

6,491

11-50

1,005

51-200

207

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

15,6220–30

4,92431–60

32661–90

3590–180

137180+

Company record updated

Median 74.0d

00–30

14,00531–60

27,79861–90

14,30890–180

2,984180+

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 “boutique 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 26,714 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 23, 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.

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

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

RevenueBase identified 7,818 company matches for boutique 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-Parthenon tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most boutique consulting firms?

London leads with 3042 company records, followed by Manchester (170) and Birmingham (91).

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 26,714 professional contacts with verified work emails tracked across these 7,818 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 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 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.