Company lists · Data verified August 2026

Top 25 Business consulting firms based in the United Kingdom

Name: Business consulting firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 8,463 companies tracked

There are 8,463 business consulting firms headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 54,104 professional contacts across them, including 16,736 with verified work emails and 6,633 with mobile numbers. London is the largest hub.

This list covers business consulting firms headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

8,463Companies

54,104Contacts tracked

16,736Verified emails

6,633Mobile numbers

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The 25 largest business consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 8,463 business consulting firms based in the United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Protiviti	Leeds	5,001-10,000	8,869	3,626
2	Navigant	London	5,001-10,000	1,034	108
3	Visagio	Reading	501-1,000	976	439
4	BIP Brasil	Londres	1,001-5,000	615	4
5	Leader Investment Group - LIG	London	501-1,000	452	42
6	Softwire	London	201-500	356	136
7	Q5	Leeds	501-1,000	340	233
8	Davies	London	5,001-10,000	333	144
9	Gate ONE	n/a	201-500	288	191
10	H&z Management Consulting	London	501-1,000	287	153
11	Seargin	London	501-1,000	275	188
12	Elixirr	London	501-1,000	271	193
13	Transform	London	201-500	258	138
14	Moorhouse B Corp Certified	London	201-500	249	148
15	Sheffield Haworth	London	201-500	241	171
16	Albany Beck	London	201-500	236	146
17	Horwath HTL	London	201-500	200	78
18	Infosys Portland	London	201-500	190	37
19	EIDRA	London	1,001-5,000	182	108
20	BIP UK	London	5,001-10,000	165	85
21	Cubematch	London	201-500	153	70
22	K3 Capital Group	Manchester	501-1,000	96	56
23	Punter Southall	London	201-500	73	12
24	Mansion House Consulting	London	201-500	39	3
25	Javelin Group	London	201-500	39	2

Showing 25 of 8,463 business consulting firms based in the United Kingdom

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Business consulting firms based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 3189 HQs

6,633Contacts with mobile numbers

95Emails re-verified in last 30 days

Companies by employee count

1-10

6,823

11-50

1,107

51-200

241

201-500

501-1,000

1,001-5,000

5,001-10,000

Business consulting firms by metro

Metro	Companies
Business consulting firms in London	3189
Business consulting firms in Manchester	205
Business consulting firms in Birmingham	106
Business consulting firms in Bristol	97
Business consulting firms in Edinburgh	91
Business consulting firms in Glasgow	88
Business consulting firms in Leeds	86

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “business consulting firms”, with match quality audited by blind human judging, and headquartered in the United Kingdom.
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: Contact records re-verify on a rolling cadence; 95 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many business consulting firms are there based in the United Kingdom?

There are 8,463 business consulting firms headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Protiviti, headquartered in Leeds, tops this list with the largest team on record.

Which city has the most business consulting firms?

London leads with 3189 headquartered companies, followed by Manchester (205) and Birmingham (106).

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 16,736 verified decision-maker contacts tracked across these 8,463 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.