Company lists · Data refreshed September 2026

Top 25 Professional services firms based in the United Kingdom

Name: Professional services 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 5, 2026 5,677 companies tracked

RevenueBase identified 5,677 company matches for professional services firms associated with the United Kingdom as of September 2026 and tracks 90,882 professional contacts across them, including 34,096 with verified work emails and 3,713 with mobile numbers. London is the largest hub.

This list covers company matches for professional services 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 5, 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 5, 2026 How this list was built

5,677Companies

90,882Contacts tracked

34,096Verified emails

3,713Mobile numbers

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The 25 largest professional services firms based in the United Kingdom

Ranked by team size

Top 25 of 5,677 company matches for professional services firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 5, 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	Kpmg UK	Exact match	London, United KingdomHQ recorded Sep 5, 2026	10001+	14,509 contacts →
	Exact match “Make growth happen.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
2	BDO UK	Exact match	London, United KingdomHQ recorded Sep 5, 2026	5,001-10,000	6,933 contacts →
	Exact match “BDO LLP is an accountancy and business advisory firm that provides Audit, Tax, Deals, and Consulting, Risk & Outsourcing (CR & O) services to entrepreneurial, growing and…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
3	Moore Global	Exact match	London, United KingdomHQ recorded Sep 5, 2026	5,001-10,000	2,047 contacts →
	Exact match “At Moore, our purpose is to help people thrive – our clients, our people and the communities they live and work in.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
4	TAX Consultant	Exact match	Brighton, United KingdomHQ recorded Sep 5, 2026	n/a	2,042 contacts →
	Exact match “A traditional general practice, with a twist.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
5	S&w	Exact match	London, United KingdomHQ recorded Sep 5, 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 5, 2026 · View company records in RevenueBase
6	TLT LLP	Exact match	Bristol, United KingdomHQ recorded Sep 5, 2026	1,001-5,000	1,797 contacts →
	Exact match “We’re your business advisers as well as your lawyers, working in step with you to protect your interests today and progress your ambitions for tomorrow.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
7	Crowe UK	Exact match	London, United KingdomHQ recorded Sep 5, 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 5, 2026 · View company records in RevenueBase
8	Moore Kingston Smith	Exact match	London, United KingdomHQ recorded Sep 5, 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 5, 2026 · View company records in RevenueBase
9	AAB	Exact match	Uk And Ireland, United KingdomHQ recorded Sep 5, 2026	1,001-5,000	1,125 contacts →
	Exact match “We provide services that help businesses at every stage of the lifecycle.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
10	TC Group	Exact match	Steyning, United KingdomHQ recorded Sep 5, 2026	1,001-5,000	901 contacts →
	Exact match “TC Group \| 0330 088 \| At TC Group, everything we do is anchored in our purpose: shaping stronger businesses and building secure and meaningful futures.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
11	PKF Littlejohn	Exact match	London, United KingdomHQ recorded Sep 5, 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 5, 2026 · View company records in RevenueBase
12	Blick Rothenberg	Exact match	Covent Garden, United KingdomHQ recorded Sep 5, 2026	501-1,000	701 contacts →
	Exact match “Blick Rothenberg is a leading tax, accounting and business advisory firm founded on personal integrity and technical expertise.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
13	Pkf-Francis Clark Chartered Accountants & Business Advisers	Exact match	Exeter, United KingdomHQ recorded Sep 5, 2026	501-1,000	700 contacts →
	Exact match “Any good accountancy firm can help with your finance, audit, and tax.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
14	Haysmac	Exact match	London, United KingdomHQ recorded Sep 5, 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 5, 2026 · View company records in RevenueBase
15	Kreston Reeves	Exact match	London, United KingdomHQ recorded Sep 5, 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 5, 2026 · View company records in RevenueBase
16	Armstrong Watson	Exact match	Carlisle, United KingdomHQ recorded Sep 5, 2026	501-1,000	579 contacts →
	Exact match “Armstrong Watson has been advising and protecting clients across the North of England and Scotland since 1867.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
17	Buzzacott	Exact match	London, United KingdomHQ recorded Sep 5, 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 5, 2026 · View company records in RevenueBase
18	Mazars In The UK	Exact match	London, United KingdomHQ recorded Sep 5, 2026	1,001-5,000	505 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
19	Price Bailey	Exact match	Bishop's Stortford, United KingdomHQ recorded Sep 5, 2026	201-500	500 contacts →
	Exact match “Price Bailey is a leading firm of chartered accountants and business advisers with offices across East Anglia, London, and a strategic presence overseas, serving local SMEs…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
20	Progeny	Exact match	Leeds, United KingdomHQ recorded Sep 5, 2026	201-500	415 contacts →
	Exact match “Progeny is the first and only global professional services firm to bring together independent advisory excellence across financial planning, tax, legal and asset management.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
21	Talbots LAW	Exact match	Stourbridge, United KingdomHQ recorded Sep 5, 2026	501-1,000	413 contacts →
	Exact match “Talbots Law can offer your business a wide range of legal services - no matter what business you are in.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
22	Gravita	Exact match	London, United KingdomHQ recorded Sep 5, 2026	201-500	379 contacts →
	Exact match “Welcome to the new era of accountancy.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
23	Duncan & Toplis	Exact match	Grantham, United KingdomHQ recorded Sep 5, 2026	501-1,000	378 contacts →
	Exact match “Duncan & Toplis is one of the largest accounting and business advisers in the UK.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
24	Affinia	Exact match	Colchester, United KingdomHQ recorded Sep 5, 2026	1,001-5,000	375 contacts →
	Exact match “Accountants, Tax and Business Advisers.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
25	Dains Accountants & Advisers	Exact match	Birmingham, United KingdomHQ recorded Sep 5, 2026	501-1,000	374 contacts →
	Exact match “Your success matters.” Recorded in the RevenueBase company graph · Sep 5, 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 “professional services 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 5,677 professional services firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 34,096 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Professional services firms based in the United Kingdom at a glance

As of Sep 5, 2026

37.5%Verified-email coverage

4.1%Mobile-number coverage

16.0Average contacts per company

1-10Median size (employees)

22.4%Largest-city concentration · London

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

3,892

11-50

1,346

51-200

253

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

31,6630–30

2,20831–60

2961–90

2090–180

176180+

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 “professional services 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 34,096 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 5, 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.

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

How many professional services firms are there based in the United Kingdom?

RevenueBase identified 5,677 company matches for professional services 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?

Kpmg UK tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most professional services firms?

London leads with 1271 company records, followed by Manchester (101) and Birmingham (94).

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 34,096 professional contacts with verified work emails tracked across these 5,677 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 5, 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.