Company lists · Data refreshed September 2026

Top 25 Enterprise classification consultancies based in the United Kingdom

Name: Enterprise classification consultancies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 4,293 companies tracked

RevenueBase identified 4,293 enterprise classification consultancies headquartered in the United Kingdom as of September 2026 and tracks 26,131 professional contacts across them, including 6,914 with verified work emails and 1,461 with mobile numbers. London is the largest hub.

This list covers enterprise classification 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 29, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 29, 2026 86% judged on-target in blind review

4,293Companies

26,131Contacts tracked

6,914Verified emails

1,461Mobile numbers

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The 25 largest enterprise classification consultancies based in the United Kingdom

Ranked by team size

Top 25 of 4,293 enterprise classification consultancies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise classification consultancies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Baringa	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1,001-5,000	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 29, 2026
2	Strategy Insights	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	528 contacts →
	Indirect evidence “Strategy Insights is a specialist business and economic development consultancy.” Source: RevenueBase Database · checked Sep 29, 2026
3	BIG 4 Consultancy Firm	Indirect evidence	Liverpool, United KingdomHQ checked Sep 29, 2026	n/a	363 contacts →
	Indirect evidence “This is a page for all contractors and consultants to join, where you are unable to disclose client relationship.” Source: RevenueBase Database · checked Sep 29, 2026
4	Elixirr	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	501-1,000	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 29, 2026
5	SRLV	Indirect evidence	Fitzrovia, United KingdomHQ checked Sep 29, 2026	201-500	230 contacts →
	Indirect evidence “SRLV is a mid-tier firm of chartered accountants, business management specialists and corporate and private client advisors.” Source: RevenueBase Database · checked Sep 29, 2026
6	Waterstons	Indirect evidence	Durham, United KingdomHQ checked Sep 29, 2026	201-500	215 contacts →
	Indirect evidence “We are an IT business with a difference.” Source: RevenueBase Database · checked Sep 29, 2026
7	OIM	Indirect evidence	Bath, United KingdomHQ checked Sep 29, 2026	n/a	198 contacts →
	Indirect evidence “OIM is dedicated to building competitive organisations.” Source: RevenueBase Database · checked Sep 29, 2026
8	Sedulo	Indirect evidence	Manchester, United KingdomHQ checked Sep 29, 2026	201-500	194 contacts →
	Indirect evidence “One of the fastest growing UK mid-tier business advisory firms, for good reason.” Source: RevenueBase Database · checked Sep 29, 2026
9	Lysander	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	121 contacts →
	Indirect evidence “Lysander is a leading multi-disciplinary construction consultancy working with an extensive list of clients across the industrial, commercial, residential, records management and…” Source: RevenueBase Database · checked Sep 29, 2026
10	OCS Consulting	Indirect evidence	Borehamwood, United KingdomHQ checked Sep 29, 2026	51-200	118 contacts →
	Indirect evidence “OCS Consulting plc, established in 1984 and now an employee-owned organisation, is a leading IT Consultancy with offices in the UK, The Netherlands, Switzerland, and Belgium.” Source: RevenueBase Database · checked Sep 29, 2026
11	Glue Reply	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	118 contacts →
	Indirect evidence “WHO WE ARE Glue Reply is a business consultancy that strives to help its clients achieve their future potential by developing solutions that often for the first time align IT…” Source: RevenueBase Database · checked Sep 29, 2026
12	Quorum	Partial evidence	Edinburgh, United KingdomHQ checked Sep 29, 2026	51-200	110 contacts →
	Partial evidence “We are an IT Consultancy and Managed Services company in Edinburgh with offices in London, Founded by Charles Scott, and Andrew Watson in We have successful Enterprise Consulting…” Source: RevenueBase Database · checked Sep 29, 2026
13	ABP Consultancy	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	108 contacts →
	Indirect evidence “At ABP Consultancy, we are a discovery-led, outcome-focused firm specialising in business process management, value engineering, and AI-powered automation.” Source: RevenueBase Database · checked Sep 29, 2026
14	Valiant Business Media	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	108 contacts →
	Indirect evidence “Valiant Business Media is a global business intelligence and consulting group.” Source: RevenueBase Database · checked Sep 29, 2026
15	The JPP Group	Indirect evidence	Northampton, United KingdomHQ checked Sep 29, 2026	51-200	99 contacts →
	Indirect evidence “Established in 1973, JPP has steadily grown to become a consultancy that offers a broad range of services to a diverse client base.” Source: RevenueBase Database · checked Sep 29, 2026
16	PHMC	Indirect evidence	Buxton, United KingdomHQ checked Sep 29, 2026	n/a	98 contacts →
	Indirect evidence “Freelance management consultancy, support business owners and their management teams.” Source: RevenueBase Database · checked Sep 29, 2026
17	K3 Capital Group	Indirect evidence	Manchester, United KingdomHQ checked Sep 29, 2026	501-1,000	97 contacts →
	Indirect evidence “K3 Capital Group is a professional services firm providing advisory services to SMEs throughout the UK and overseas.” Source: RevenueBase Database · checked Sep 29, 2026
18	BDO Northern Ireland	Indirect evidence	Belfast, United KingdomHQ checked Sep 29, 2026	51-200	93 contacts →
	Indirect evidence “BDO NI specialises in helping businesses, whether start-ups or multinationals, to grow.” Source: RevenueBase Database · checked Sep 29, 2026
19	SA Group	Indirect evidence	Trowbridge, United KingdomHQ checked Sep 29, 2026	51-200	93 contacts →
	Indirect evidence “SA Group is a rapidly growing business management consultancy supporting clients in the delivery of vital projects.” Source: RevenueBase Database · checked Sep 29, 2026
20	Jean Edwards Consulting	Indirect evidence	Brighton, United KingdomHQ checked Sep 29, 2026	51-200	88 contacts →
	Indirect evidence “Founded in 2006, Jean Edwards Consulting is a leading IT and management consultancy, delivering top-tier data and change management solutions to clients in the (re)insurance…” Source: RevenueBase Database · checked Sep 29, 2026
21	Growth HUB	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	85 contacts →
	Indirect evidence “Growth Hub embeds operational teams inside professional services firms.” Source: RevenueBase Database · checked Sep 29, 2026
22	Identity Consult	Indirect evidence	Sunderland, United KingdomHQ checked Sep 29, 2026	11-50	80 contacts →
	Indirect evidence “Identity Consult is a Cost and Project Management consultancy which is passionate about making a difference to our Clients and their stakeholders.” Source: RevenueBase Database · checked Sep 29, 2026
23	PEN	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	76 contacts →
	Indirect evidence “We’re a specialist, management consultancy, focusing on; Customer Experience, Operational Excellence and Change Delivery, dedicated to helping our clients create real, positive…” Source: RevenueBase Database · checked Sep 29, 2026
24	Idex Consulting LTD	Indirect evidence	Birmingham, United KingdomHQ checked Sep 29, 2026	51-200	72 contacts →
	Indirect evidence “IDEX Consulting is an innovative Business Growth Consultancy specialising in transforming lives, careers and businesses by offering a bespoke service within the Insurance…” Source: RevenueBase Database · checked Sep 29, 2026
25	Punter Southall	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	72 contacts →
	Indirect evidence “Punter Southall is a group of companies with one aim – helping businesses and people make better decisions.” Source: RevenueBase Database · checked Sep 29, 2026

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: enterprise classification 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 enterprise classification consultancies.
Partial evidence: Its own public description names part of enterprise classification consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise classification 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 4,293 enterprise classification consultancies based in the United Kingdom

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Enterprise classification consultancies based in the United Kingdom at a glance

As of Sep 29, 2026

26.5%Verified-email coverage

5.6%Mobile-number coverage

6.1Average contacts per company

1-10Median size (employees)

32.2%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

3,578

11-50

551

51-200

118

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 31.0d

2,9200–30

3,76431–60

23961–90

590–180

20180+

Company record updated

Median 95.0d

00–30

2,11931–60

8,72761–90

14,09790–180

1,384180+

How 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 enterprise classification 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 “enterprise classification 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 enterprise classification 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 enterprise classification 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, 6,914 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 29, 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.

Enterprise classification consultancies by metro

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 enterprise classification 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 enterprise classification consultancies are there based in the United Kingdom?

RevenueBase identified 4,293 enterprise classification 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?

Baringa, headquartered in London, tops this list with the largest team on record.

Which city has the most enterprise classification consultancies?

London leads with 1384 headquartered companies, followed by Manchester (112) and Birmingham (64).

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 6,914 verified decision-maker contacts tracked across these 4,293 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 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 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.