Company lists · Data refreshed September 2026

Top 25 Business advisory and consulting firms based in London, United Kingdom

Name: Business advisory and 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 23, 2026 3,884 companies tracked

RevenueBase identified 3,884 company matches for business advisory and consulting firms associated with London, United Kingdom as of September 2026 and tracks 57,066 professional contacts across them, including 25,224 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for business advisory and 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 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

3,884Companies

57,066Contacts tracked

25,224Verified emails

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The 25 largest business advisory and consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 3,884 company matches for business advisory and consulting firms based in London, 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	AZETS	Exact match	London, United KingdomHQ recorded Sep 23, 2026	5,001-10,000	5,632 contacts →
	Exact match “Azets is an international business advisory group, with local experts in 190 locations across eight countries, backed by progressive technology.” 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	S&w	Exact match	London, United KingdomHQ recorded Sep 23, 2026	1,001-5,000	1,930 contacts →
	Exact match “As a fast growing UK accounting and advisory firm, we’ve been there, as a trusted partner, helping businesses and individuals meet challenges and seize opportunities across…” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
5	Crowe UK	Exact match	London, United KingdomHQ recorded Sep 23, 2026	1,001-5,000	1,395 contacts →
	Exact match “Crowe UK is a leading audit, tax, advisory and consulting firm with a national presence to complement our international reach.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
6	Moore Kingston Smith	Exact match	London, United KingdomHQ recorded Sep 23, 2026	501-1,000	1,151 contacts →
	Exact match “At Moore Kingston Smith, we believe in the potential of people to make a positive impact, fuelled by the power of genuine understanding.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
7	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
8	FRP Advisory	Exact match	London, United KingdomHQ recorded Sep 23, 2026	501-1,000	731 contacts →
	Exact match “FRP is a leading national business advisory firm.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
9	PKF Littlejohn	Exact match	London, United KingdomHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
10	Haysmac	Exact match	London, United KingdomHQ recorded Sep 23, 2026	501-1,000	655 contacts →
	Exact match “HaysMac is an award‑winning accountancy, tax and advisory firm, known for delivering expert, partner‑led advice to ambitious organisations and individuals.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
11	Kreston Reeves	Exact match	London, United KingdomHQ recorded Sep 23, 2026	501-1,000	602 contacts →
	Exact match “We guide our clients, colleagues and communities to a brighter future.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
12	Buzzacott	Exact match	London, United KingdomHQ recorded Sep 23, 2026	501-1,000	575 contacts →
	Exact match “Buzzacott is an accountancy and advisory firm with a long-standing history of supporting individuals, businesses, and not-for-profits.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
13	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
14	Mazars In The UK	Exact match	London, United KingdomHQ recorded Sep 23, 2026	1,001-5,000	505 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
15	Clearwater	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	384 contacts →
	Exact match “Clearwater is an independent corporate finance house focused on unlocking the latent potential in every business.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
16	Gravita	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	379 contacts →
	Exact match “Welcome to the new era of accountancy.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
17	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
18	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
19	Sheffield Haworth	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	244 contacts →
	Exact match “Sheffield Haworth is a global consultancy founded in 1993.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
20	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
21	Cavendish	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	211 contacts →
	Exact match “Cavendish is a UK champion for ambitious growth and investment companies.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
22	Lubbock Fine	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	203 contacts →
	Exact match “Lubbock Fine is an independent accounting, tax, audit and advisory firm in the City of London.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
23	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
24	Sopher CO	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	185 contacts →
	Exact match “Sopher + Co is one of the most entrepreneurial and progressive firms of accountants, business advisers, tax and corporate finance consultants in London.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
25	Oury Clark	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	171 contacts →
	Exact match “Our pioneering integrated approach to professional services cuts through the complicated layers of the legal and accountancy world to give you straightforward joined-up advice and…” 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 “business advisory and 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 3,884 business advisory and consulting firms based in London, United Kingdom

See the full list, filter by size, metro and specialty, and access 25,224 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Business advisory and consulting firms based in London, United Kingdom at a glance

As of Sep 23, 2026

44.2%Verified-email coverage

14.7Average contacts per company

1-10Median size (employees)

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

2,957

11-50

701

51-200

144

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 3,884 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 “business advisory and 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 25,224 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.

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

How many business advisory and consulting firms are there based in London, United Kingdom?

RevenueBase identified 3,884 company matches for business advisory and 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 business advisory and consulting firms?

London leads the United Kingdom with 3,884 company records, followed by Manchester (226) and Birmingham (127).

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 25,224 professional contacts with verified work emails tracked across these 3,884 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.