Company lists · Data refreshed September 2026

Top 25 Consultancy agencies based in the United Kingdom

Name: Consultancy agencies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 26,883 companies tracked

RevenueBase identified 26,883 company matches for consultancy agencies associated with the United Kingdom as of September 2026 and tracks 214,238 professional contacts across them, including 70,916 with verified work emails and 17,105 with mobile numbers. London is the largest hub.

This list covers company matches for consultancy agencies 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 24, 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 24, 2026 How this list was built

26,883Companies

214,238Contacts tracked

70,916Verified emails

17,105Mobile numbers

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The 25 largest consultancy agencies based in the United Kingdom

Ranked by team size

Top 25 of 26,883 company matches for consultancy agencies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 24, 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 24, 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 24, 2026 · View company records in RevenueBase
2	Buro Happold	Exact match	Bath, United KingdomHQ recorded Sep 24, 2026	1,001-5,000	3,336 contacts →
	Exact match “We are an international, integrated consultancy of engineers, designers and advisers.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
3	Baringa	Exact match	London, United KingdomHQ recorded Sep 24, 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 24, 2026 · View company records in RevenueBase
4	Antal International	Exact match	London, United KingdomHQ recorded Sep 24, 2026	1,001-5,000	1,979 contacts →
	Exact match “Antal International is a global executive search organisation with over 130 offices in more than 30 countries.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
5	Barnett Waddingham	Exact match	London, United KingdomHQ recorded Sep 24, 2026	1,001-5,000	1,331 contacts →
	Exact match “We are a leading UK professional services consultancy at the forefront of risk, pensions, investment and insurance.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
6	Office Angels	Exact match	London, United KingdomHQ recorded Sep 24, 2026	201-500	1,259 contacts →
	Exact match “For 40 years now, we’ve been helping you to find the right path to a happy and successful future whether you’re a jobseeker or an employer.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
7	Blackmont Consulting	Exact match	London, United KingdomHQ recorded Sep 24, 2026	201-500	1,221 contacts →
	Exact match “Blackmont Consulting provides 100% free advisory services to NGO´s, NPO´s and start-ups.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
8	True Potential LLP	Exact match	Newcastle Upon Tyne, United KingdomHQ recorded Sep 24, 2026	501-1,000	1,189 contacts →
	Exact match “Through our industry leading technology and services, we power the businesses of 20% of the UK financial adviser market.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
9	Lambert Smith Hampton	Exact match	London, United KingdomHQ recorded Sep 24, 2026	1,001-5,000	1,016 contacts →
	Exact match “Lambert Smith Hampton (LSH) is one of the UK and Ireland's leading, and most progressive, property consultancies with 28 offices and 1,200 staff.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
10	OFF To Work	Exact match	London, United KingdomHQ recorded Sep 24, 2026	n/a	912 contacts →
	Exact match “Casual Staffing \| Permanent Recruitment \| Temp to Perm \| Training \| Consultancy Off to Work offers more than just recruitment.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
11	Oliver James	Exact match	Manchester, United KingdomHQ recorded Sep 24, 2026	501-1,000	870 contacts →
	Exact match “At Oliver James, we deliver flexible hiring solutions tailored to your business needs across financial services, professional services, commerce & industry.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
12	CPM UK	Exact match	Thame, United KingdomHQ recorded Sep 24, 2026	1,001-5,000	851 contacts →
	Exact match “CPM is an international.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
13	PKF Littlejohn	Exact match	London, United KingdomHQ recorded Sep 24, 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 24, 2026 · View company records in RevenueBase
14	Setfords	Exact match	Surrey, United KingdomHQ recorded Sep 24, 2026	1,001-5,000	661 contacts →
	Exact match “Setfords is the fastest-growing UK Top 100 law firm.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
15	Tony GEE And Partners	Exact match	Esher, United KingdomHQ recorded Sep 24, 2026	501-1,000	606 contacts →
	Exact match “Tony Gee is an award winning firm that provides specialist engineering consultancy services to the construction industry.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
16	Pegasus Group	Exact match	Lichfield, United KingdomHQ recorded Sep 24, 2026	201-500	580 contacts →
	Exact match “Since 2003, we’ve been solving planning and development problems for our clients successfully.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
17	Alten LTD - UK	Exact match	London, United KingdomHQ recorded Sep 24, 2026	10001+	529 contacts →
	Exact match “We are a leading Engineering and IT consultancy operating across all sectors in 30 different countries.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
18	Strategy Insights	Exact match	London, United KingdomHQ recorded Sep 24, 2026	51-200	528 contacts →
	Exact match “Strategy Insights is a specialist business and economic development consultancy.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
19	Aspens Services LTD	Exact match	London, United KingdomHQ recorded Sep 24, 2026	5,001-10,000	497 contacts →
	Exact match “We are a catering company who specialise in the education sector.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
20	Analysys Mason	Exact match	London, United KingdomHQ recorded Sep 24, 2026	201-500	459 contacts →
	Exact match “Analysys Mason is the leading specialist consultancy, creating lasting value in technology-intensive industries, including telecoms, digital infrastructure, software, IT services…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
21	Purple	Exact match	London, United KingdomHQ recorded Sep 24, 2026	51-200	449 contacts →
	Exact match “Purple is independent in philosophy, attitude and operation –offering a boutique in-house approach, the strategic requirements of each client are individually tailored from the…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
22	MBA	Exact match	London, United KingdomHQ recorded Sep 24, 2026	51-200	434 contacts →
	Exact match “MBA: The Acceleration Agents, where digital and direct interconnect.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
23	GRS	Exact match	London, United KingdomHQ recorded Sep 24, 2026	51-200	425 contacts →
	Exact match “The GRS Group is an international executive search consultancy whose services include retained search, contingency search, advertised selection and interim solutions.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
24	Emperor	Exact match	Aldgate, United KingdomHQ recorded Sep 24, 2026	201-500	415 contacts →
	Exact match “Emperor is one of the UK's leading employee-owned creative communications agencies.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
25	Paperchase	Exact match	London Croydon, United KingdomHQ recorded Sep 24, 2026	1,001-5,000	402 contacts →
	Exact match “Paperchase Accountancy is a leading hospitality accountancy and consultancy firm.” Recorded in the RevenueBase company graph · Sep 24, 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 “consultancy agencies”. 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 26,883 consultancy agencies based in the United Kingdom

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Consultancy agencies based in the United Kingdom at a glance

As of Sep 24, 2026

33.1%Verified-email coverage

8.0%Mobile-number coverage

8.0Average contacts per company

1-10Median size (employees)

33.9%Largest-city concentration · London

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

21,712

11-50

4,169

51-200

699

201-500

118

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 26.0d

53,4820–30

16,06331–60

97761–90

9890–180

296180+

Company record updated

Median 80.0d

00–30

30,05031–60

100,11261–90

72,63190–180

11,445180+

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 “consultancy agencies” 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 70,916 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 24, 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.

Consultancy agencies 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 “consultancy agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many consultancy agencies are there based in the United Kingdom?

RevenueBase identified 26,883 company matches for consultancy agencies 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 consultancy agencies?

London leads with 9103 company records, followed by Manchester (709) and Birmingham (369).

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 70,916 professional contacts with verified work emails tracked across these 26,883 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 24, 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.