Company lists · Data refreshed September 2026

Top 25 Professional services networks based in the United Kingdom

RevenueBase identified 927 company matches for professional services networks associated with the United Kingdom as of September 2026 and tracks 80,673 professional contacts across them, including 23,663 with verified work emails. London is the largest hub.

This list covers company matches for professional services networks 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 29, 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 29, 2026 How this list was built
927Companies
80,673Contacts tracked
23,663Verified emails
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The 25 largest professional services networks based in the United Kingdom

Ranked by team size
Top 25 of 927 company matches for professional services networks based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 29, 202610001+14,509 contacts →

Exact match

“Make growth happen.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 29, 20265,001-10,0006,933 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 29, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 29, 20265,001-10,0005,632 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 29, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 29, 20265,001-10,0005,509 contacts →

Exact match

“When choosing an advisor, you could accept the usual compromises.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 29, 20261,001-5,0003,870 contacts →

Exact match

“Pinsent Masons is a multinational professional services business with a robust legal foundation, operating with a clear purpose-led strategy.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 29, 202610001+3,630 contacts →

Exact match

“RSM is a leading global network of assurance, tax and consulting firms focused on the middle-market.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 29, 20265,001-10,0002,047 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 29, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 29, 20261,001-5,0001,930 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 29, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 29, 20261,001-5,0001,395 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 29, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 29, 2026501-1,0001,151 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 29, 2026 · View company records in RevenueBase
11Exact matchUk And Ireland, United KingdomHQ recorded Sep 29, 20261,001-5,0001,125 contacts →

Exact match

“We provide services that help businesses at every stage of the lifecycle.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 29, 20261,001-5,0001,001 contacts →

Exact match

“We are a leading provider of accountancy services and business advice for small and medium-sized enterprises and individuals across the UK and Ireland.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 29, 202610001+725 contacts →

Exact match

“PKF is a global family of legally independent professional services firms bound together by a shared commitment to quality, integrity and the creation of clarity in a complex…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 29, 2026501-1,000702 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 29, 2026 · View company records in RevenueBase
15Exact matchCovent Garden, United KingdomHQ recorded Sep 29, 2026501-1,000701 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 29, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 29, 202610001+685 contacts →

Exact match

“Nexia is a leading worldwide network of independent accounting and consulting firms.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 29, 2026501-1,000655 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 29, 2026 · View company records in RevenueBase
18Exact matchUnited KingdomHQ recorded Sep 29, 2026501-1,000615 contacts →

Exact match

“Through our network of eleven offices, we work together as one national team offering specialist legal advice and services to regional, national and international clients, both…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 29, 2026501-1,000602 contacts →

Exact match

“We guide our clients, colleagues and communities to a brighter future.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20Exact matchCarlisle, United KingdomHQ recorded Sep 29, 2026501-1,000579 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 29, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 29, 202610001+512 contacts →

Exact match

“Kreston is a global network of innovative, like-minded accounting firms that puts trusted relationships and exceptional care at the heart of everything it does.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 29, 20261,001-5,000505 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchLeeds, United KingdomHQ recorded Sep 29, 2026201-500415 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 29, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 29, 2026201-500379 contacts →

Exact match

“Welcome to the new era of accountancy.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25Exact matchGrantham, United KingdomHQ recorded Sep 29, 2026501-1,000378 contacts →

Exact match

“Duncan & Toplis is one of the largest accounting and business advisers in the UK.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 927 professional services networks based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 23,663 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Professional services networks based in the United Kingdom at a glance

As of Sep 29, 2026
29.3%Verified-email coverage
87.0Average contacts per company
11-50Median size (employees)
38.4%Largest-city concentration · London
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
397
11-50
298
51-200
109
201-500
30
501-1,000
27
1,001-5,000
37
5,001-10,000
12
10001+
10

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 927 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 the United Kingdom whose business descriptions match “professional services networks” 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 23,663 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 29, 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.

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 networks”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 927 company matches for professional services networks 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 networks?

London leads with 356 company records, followed by Birmingham (25) and Manchester (18).

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 23,663 professional contacts with verified work emails tracked across these 927 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 29, 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.