Company lists · Data refreshed September 2026
Top 25 Business consultancies based in the United Kingdom
RevenueBase identified 15,837 business consultancies headquartered in the United Kingdom as of September 2026 and tracks 112,820 professional contacts across them, including 40,922 with verified work emails and 9,690 with mobile numbers. London is the largest hub.
This list covers business consultancies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 23, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.
The 25 largest business consultancies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 17,070 contacts → | ||||
Indirect evidence “Our unique combination of transformative strategy, transactions and corporate finance delivers real-world value – solutions that work in practice, not just on paper.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 2 | 2,179 contacts → | ||||
Indirect evidence “Baringa is a global consulting firm that helps leaders drive meaningful change and create value.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,797 contacts → | ||||
Indirect evidence “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.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,221 contacts → | ||||
Indirect evidence “Blackmont Consulting provides 100% free advisory services to NGO´s, NPO´s and start-ups.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,011 contacts → | ||||
Indirect evidence “At OC & C Strategy Consultants we have more than 35 years of experience at unpicking the most complex business challenges with simple, uncommon sense™.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 6 | 901 contacts → | ||||
Indirect evidence “TC Group | 0330 088 | At TC Group, everything we do is anchored in our purpose: shaping stronger businesses and building secure and meaningful futures.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 7 | 661 contacts → | ||||
Indirect evidence “Setfords is the fastest-growing UK Top 100 law firm.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 8 | 579 contacts → | ||||
Indirect evidence “Armstrong Watson has been advising and protecting clients across the North of England and Scotland since 1867.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 9 | 528 contacts → | ||||
Indirect evidence “Strategy Insights is a specialist business and economic development consultancy.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 10 | 500 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 11 | 459 contacts → | ||||
Indirect evidence “Analysys Mason is the leading specialist consultancy, creating lasting value in technology-intensive industries, including telecoms, digital infrastructure, software, IT services…” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 12 | 402 contacts → | ||||
Indirect evidence “Paperchase Accountancy is a leading hospitality accountancy and consultancy firm.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 13 | 384 contacts → | ||||
Indirect evidence “Clearwater is an independent corporate finance house focused on unlocking the latent potential in every business.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 14 | 378 contacts → | ||||
Indirect evidence “Duncan & Toplis is one of the largest accounting and business advisers in the UK.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 15 | 360 contacts → | ||||
Indirect evidence “Softwire exists to help organisations use technology to deliver meaningful outcomes and a positive impact for themselves, their users and the world.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 16 | 351 contacts → | ||||
Indirect evidence “Emergn is a global technology and management consultancy built on a simple conviction: the only sustainable competitive advantage is the way you work.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 17 | 344 contacts → | ||||
Indirect evidence “Q5 is a global, award-winning management consultancy focused on building healthy, high-performing organisations.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 18 | 331 contacts → | ||||
Indirect evidence “At bk plus, we support SMEs, owner-managed and entrepreneurial businesses across the UK with practical accounting and advisory services that are tailored to your needs.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 19 | 329 contacts → | ||||
Indirect evidence “We are the global consulting division of Davies, accelerating business, technology and people performance across financial services including Retail Finance & Corporate Banking…” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 20 | 320 contacts → | ||||
Indirect evidence “In 2018 PGC rebranded as Friisberg & Partners International +44 207 062 3603” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 21 | 302 contacts → | ||||
Indirect evidence “Cartesian is a specialist consulting firm focused on the global telecommunications, media, and technology industries and is now part of Bounteous, an AI services firm helping…” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 22 | 283 contacts → | ||||
Indirect evidence “Leonard Curtis is a team of 300+ financial, legal and business experts, operating across the UK and offshore.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 23 | 281 contacts → | ||||
Indirect evidence “Most organisations commit to bold growth ambitions but aren’t set up to deliver them.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 24 | 277 contacts → | ||||
Indirect evidence “Quantuma is a leading business advisory firm which works with businesses at the key milestones.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 25 | 275 contacts → | ||||
Indirect evidence “An award-winning global consulting firm working with clients across a diverse range of markets, industries and geographies.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: business consultancies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names business consultancies.
- Partial evidence
- Its own public description names part of business consultancies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name business consultancies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 15,837 business consultancies based in the United Kingdom
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Business consultancies based in the United Kingdom at a glance
As of Sep 23, 2026Companies by employee count
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 25.0dCompany record updated
Median 75.0dHow this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among business consultancies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United Kingdom whose own description of what they do matches “business consultancies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names business consultancies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among business consultancies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 40,922 across the full list. 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.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Business consultancies by metro
- Business consultancies in London5730
- Business consultancies in Manchester355
- Business consultancies in Birmingham202
- Business consultancies in Glasgow182
- Business consultancies in Bristol179
- Business consultancies in Edinburgh176
- Business consultancies in Leeds161
- Business consultancies in Cambridge126
- Business consultancies in Nottingham110
- Business consultancies in Reading101
- Business consultancies in Oxford95
- Business consultancies in Sheffield88
- Business consultancies in Belfast81
- Business consultancies in Liverpool78
- Business consultancies in Leicester70
- Business consultancies in Cardiff67
- Business consultancies in Derby65
- Business consultancies in Southampton64
- Business consultancies in Milton Keynes61
- Business consultancies in Brighton60
- Business consultancies in York60
- Business consultancies in Bath59
- Business consultancies in Northampton57
- Business consultancies in Coventry56
- Business consultancies in Cheltenham54
- Business consultancies in Guildford51
- Business consultancies in Newcastle Upon Tyne51
- Business consultancies in Norwich51
- Business consultancies in Winchester48
- Business consultancies in Chester46
- Business consultancies in Aberdeen45
- Business consultancies in Bournemouth44
- Business consultancies in Chelmsford41
- Business consultancies in Exeter39
- Business consultancies in Peterborough39
- Business consultancies in Harrogate38
- Business consultancies in Huddersfield38
- Business consultancies in Solihull38
- Business consultancies in Watford37
- Business consultancies in Preston36
- Business consultancies in St Albans35
- Business consultancies in Basingstoke34
- Business consultancies in Maidenhead33
- Business consultancies in Warrington33
- Business consultancies in Bedford31
- Business consultancies in Poole31
- Business consultancies in Swindon31
- Business consultancies in Uk30
- Business consultancies in Ipswich29
- Business consultancies in Lincoln29
- Business consultancies in Worcester29
- Business consultancies in London London28
- Business consultancies in Durham27
- Business consultancies in Hove27
- Business consultancies in Doncaster26
- Business consultancies in Newbury26
- Business consultancies in Stockport26
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names business consultancies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many business consultancies are there based in the United Kingdom?
RevenueBase identified 15,837 business consultancies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Ey-Parthenon, headquartered in London, tops this list with the largest team on record.
Which city has the most business consultancies?
London leads with 5730 headquartered companies, followed by Manchester (355) and Birmingham (202).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 40,922 verified decision-maker contacts tracked across these 15,837 companies.
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.
Ready to reach these companies? Verified emails and direct dials for all 15,837 business consultancies based in the United Kingdom. Start with a free account, no credit card.
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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 Smart Search, 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.