Company lists · Data refreshed September 2026

Top 25 Development consulting firms based in the United Kingdom

Name: Development consulting 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 24, 2026 8,121 companies tracked

RevenueBase identified 8,121 development consulting firms headquartered in the United Kingdom as of September 2026 and tracks 61,146 professional contacts across them, including 21,652 with verified work emails and 4,284 with mobile numbers. London is the largest hub.

This list covers development 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. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 24, 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 24, 2026 86% judged on-target in blind review

8,121Companies

61,146Contacts tracked

21,652Verified emails

4,284Mobile numbers

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The 25 largest development consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 8,121 development consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to development consulting firms: 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	MACE	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	5,001-10,000	8,458 contacts →
	Indirect evidence “Mace Consult launched as a new and independent business on 5 March 2026, through a carve-out from Mace Group.” Source: RevenueBase Database · checked Sep 24, 2026
2	Baringa	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	1,001-5,000	2,179 contacts →
	Partial evidence “Baringa is a global consulting firm that helps leaders drive meaningful change and create value.” Source: RevenueBase Database · checked Sep 24, 2026
3	Blackmont Consulting	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	1,221 contacts →
	Partial evidence “Blackmont Consulting provides 100% free advisory services to NGO´s, NPO´s and start-ups.” Source: RevenueBase Database · checked Sep 24, 2026
4	Oc&c Strategy Consultants	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	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 24, 2026
5	Adam Smith International	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	n/a	825 contacts →
	Indirect evidence “Adam Smith International is a global advisory company that works locally to transform lives by making economies stronger, societies more stable, and governments more effective.” Source: RevenueBase Database · checked Sep 24, 2026
6	Pell Frischmann	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	690 contacts →
	Indirect evidence “Pell Frischmann is a specialist advisory and technical consultancy operating across the built and natural environment, helping to shape a better future for the communities in…” Source: RevenueBase Database · checked Sep 24, 2026
7	Ricardo PLC	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	1,001-5,000	670 contacts →
	Indirect evidence “Click the 'Follow' button and explore careers at Ricardo on our 'Jobs' and 'Life' tabs and at careers.ricardo.com.” Source: RevenueBase Database · checked Sep 24, 2026
8	Pegasus Group	Partial evidence	Lichfield, United KingdomHQ checked Sep 24, 2026	201-500	580 contacts →
	Partial evidence “Since 2003, we’ve been solving planning and development problems for our clients successfully.” Source: RevenueBase Database · checked Sep 24, 2026
9	Strategy Insights	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	528 contacts →
	Partial evidence “Strategy Insights is a specialist business and economic development consultancy.” Source: RevenueBase Database · checked Sep 24, 2026
10	STEER	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	524 contacts →
	Indirect evidence “Complex challenges.” Source: RevenueBase Database · checked Sep 24, 2026
11	Fichtner Consulting Engineers LTD	Indirect evidence	Stockport, United KingdomHQ checked Sep 24, 2026	51-200	418 contacts →
	Indirect evidence “Fichtner is one of the world's leading independent engineering consultancy firms.” Source: RevenueBase Database · checked Sep 24, 2026
12	Q5	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	344 contacts →
	Indirect evidence “Q5 is a global, award-winning management consultancy focused on building healthy, high-performing organisations.” Source: RevenueBase Database · checked Sep 24, 2026
13	Mercer UK	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	10001+	329 contacts →
	Indirect evidence “At Mercer, A Marsh business, we’re helping our clients realize their investment objectives, shape the future of work, and enhance health and retirement outcomes for their people.” Source: RevenueBase Database · checked Sep 24, 2026
14	Cumming Group UK & Europe	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	324 contacts →
	Indirect evidence “At Cumming Group, we are passionate about helping our clients execute large-scale, complex projects on-time and within budget.” Source: RevenueBase Database · checked Sep 24, 2026
15	Elixirr	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	275 contacts →
	Partial evidence “An award-winning global consulting firm working with clients across a diverse range of markets, industries and geographies.” Source: RevenueBase Database · checked Sep 24, 2026
16	Moorhouse B Corp Certified	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	247 contacts →
	Partial evidence “We’re a dynamic consulting firm, focused on delivering change.” Source: RevenueBase Database · checked Sep 24, 2026
17	Albany Beck	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	240 contacts →
	Partial evidence “Albany Beck is a client-first consulting firm helping financial services organisations deliver complex change and build capability, not dependency.” Source: RevenueBase Database · checked Sep 24, 2026
18	Rapleys	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	222 contacts →
	Indirect evidence “Our business is built around our authentic expertise and the services we offer – building consultancy, commercial, planning and residential.” Source: RevenueBase Database · checked Sep 24, 2026
19	Cambridge Education	Partial evidence	Cambridge, United KingdomHQ checked Sep 24, 2026	201-500	189 contacts →
	Partial evidence “Cambridge Education is a global leader in providing consultancy services to government agencies at national and local level, and to international development agencies and…” Source: RevenueBase Database · checked Sep 24, 2026
20	True North Partners	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	185 contacts →
	Partial evidence “True North Partners LLP is an independent consulting firm based in London, Johannesburg, Frankfurt, Amsterdam and Madrid.” Source: RevenueBase Database · checked Sep 24, 2026
21	OCO Global	Indirect evidence	Belfast, United KingdomHQ checked Sep 24, 2026	51-200	167 contacts →
	Indirect evidence “OCO Global shapes strategy and delivers programmes that scale investment, expand exports, attract talent, and strengthen innovation ecosystems.” Source: RevenueBase Database · checked Sep 24, 2026
22	TXM Consult	Indirect evidence	Milton Keynes, United KingdomHQ checked Sep 24, 2026	51-200	166 contacts →
	Indirect evidence “In an uncertain, complex, and ambiguous world, business change is essential and inevitable.” Source: RevenueBase Database · checked Sep 24, 2026
23	CVL	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	n/a	165 contacts →
	Partial evidence “Strategic development for already dynamic businesses, successful mergers & acquisitions between household names, technology planning in cutting edge industries and real-world…” Source: RevenueBase Database · checked Sep 24, 2026
24	Integrity	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	158 contacts →
	Indirect evidence “Integrity sets the international standard for ethically delivered, expert services.” Source: RevenueBase Database · checked Sep 24, 2026
25	QUOD	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	154 contacts →
	Partial evidence “Quod is a specialist, independent consultancy at the cutting edge of planning and development economics.” Source: RevenueBase Database · checked Sep 24, 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: development consulting firms. 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 development consulting firms.
Partial evidence: Its own public description names part of development consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name development consulting firms. 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 8,121 development consulting firms based in the United Kingdom

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Development consulting firms based in the United Kingdom at a glance

As of Sep 24, 2026

35.4%Verified-email coverage

7.0%Mobile-number coverage

7.5Average contacts per company

1-10Median size (employees)

37.4%Largest-city concentration · London

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

6,703

11-50

1,055

51-200

231

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 26.0d

19,1750–30

5,60331–60

33661–90

3190–180

82180+

Company record updated

Median 76.0d

00–30

8,68231–60

33,05261–90

22,32290–180

4,207180+

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 development consulting firms, 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 “development consulting firms”. 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 development consulting firms), 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 development consulting firms, 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, 21,652 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 24, 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.

Development consulting firms by metro

Development consulting firms in London3035
Development consulting firms in Manchester187
Development consulting firms in Birmingham98
Development consulting firms in Bristol97
Development consulting firms in Edinburgh93
Development consulting firms in Glasgow88
Development consulting firms in Cambridge76
Development consulting firms in Leeds71
Development consulting firms in Oxford55
Development consulting firms in Reading55
Development consulting firms in Belfast47
Development consulting firms in Sheffield44
Development consulting firms in Cardiff42
Development consulting firms in Nottingham42
Development consulting firms in Brighton40
Development consulting firms in Liverpool39
Development consulting firms in Milton Keynes36
Development consulting firms in Bath33
Development consulting firms in Derby32
Development consulting firms in Cheltenham31
Development consulting firms in Chester27
Development consulting firms in Leicester27
Development consulting firms in Coventry26
Development consulting firms in Newcastle Upon Tyne26
Development consulting firms in Southampton26

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 development consulting firms, 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 development consulting firms are there based in the United Kingdom?

RevenueBase identified 8,121 development consulting firms 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?

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

Which city has the most development consulting firms?

London leads with 3035 headquartered companies, followed by Manchester (187) and Birmingham (98).

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 21,652 verified decision-maker contacts tracked across these 8,121 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 24, 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.