Company lists · Data refreshed September 2026

Top 25 Process improvement consulting firms based in the United Kingdom

Name: Process improvement 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 5, 2026 3,791 companies tracked

RevenueBase identified 3,791 process improvement consulting firms headquartered in the United Kingdom as of September 2026 and tracks 17,582 professional contacts across them, including 5,131 with verified work emails and 1,464 with mobile numbers. London is the largest hub.

This list covers process improvement 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

3,791Companies

17,582Contacts tracked

5,131Verified emails

1,464Mobile numbers

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The 25 largest process improvement consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 3,791 process improvement consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names process improvement consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Quick ReleaseIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	375
	“Quick Release_ is a go-to global provider of Product and Engineering Data management.” Source: company website · checked Sep 5, 2026
2	EmergnIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	351
	“Emergn is a global technology and management consultancy built on a simple conviction: the only sustainable competitive advantage is the way you work.” Source: company website · checked Sep 5, 2026
3	Q5Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	344
	“Q5 is a global, award-winning management consultancy focused on building healthy, high-performing organisations.” Source: company website · checked Sep 5, 2026
4	Moorhouse B Corp CertifiedPartial evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	247
	“We’re a dynamic consulting firm, focused on delivering change.” Source: company website · checked Sep 5, 2026
5	ClarasysPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	170
	“We are an employee-owned, award-winning international consulting firm that believes there’s a better way to do consultancy.” Source: company website · checked Sep 5, 2026
6	ORGIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	139
	“We believe that change is an opportunity to thrive.” Source: company website · checked Sep 5, 2026
7	IBUPartial evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	139
	“We are the most trusted consulting & Information Technology service partner, who has been thriving hard to deliver customer-centric and proven global competence to our clients all…” Source: company website · checked Sep 5, 2026
8	SquarcleIndirect evidence	Bristol, United KingdomHQ checked Sep 5, 2026	51-200	129
	“Squarcle is a procurement, supply chain and digital specialist which sits at the centre of transformation, with a skillset which has proven relevance in any market characterised…” Source: company website · checked Sep 5, 2026
9	ChartwellIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	117
	“Chartwell is a global operations consultancy with offices in London, Boston and Hamburg.” Source: company website · checked Sep 5, 2026
10	CognitionIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	117
	“We are practitioners with centuries of combined expertise in enhancing organizations with innovative, human-centric solutions that create substantial and sustainable value by…” Source: company website · checked Sep 5, 2026
11	OaklinIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	115
	“Oaklin is an independent management consultancy.” Source: company website · checked Sep 5, 2026
12	AgenciaIndirect evidence	Hessle, United KingdomHQ checked Sep 5, 2026	11-50	98
	“Agencia has been transforming organisations for over 20 years.” Source: company website · checked Sep 5, 2026
13	WhitetreePartial evidence	Bristol, United KingdomHQ checked Sep 5, 2026	51-200	89
	“Whitetree is an agile consulting firm that provides strategic guidance and operational support to large businesses and government departments.” Source: company website · checked Sep 5, 2026
14	Growth HUBIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	85
	“Growth Hub embeds operational teams inside professional services firms.” Source: company website · checked Sep 5, 2026
15	ProservartnerPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	84
	“Proservartner is an international consulting firm.” Source: company website · checked Sep 5, 2026
16	Simpler Consulting, An IBM CompanyIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	n/a	84
	“With Simpler as your lean-transformation partner, you can achieve long-term success.” Source: company website · checked Sep 5, 2026
17	Cambridge Management ConsultingPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	82
	“Cambridge Management Consulting (Cambridge MC) is an international consulting firm that helps companies of all sizes have a better impact on the world.” Source: company website · checked Sep 5, 2026
18	Embridge ConsultingIndirect evidence	Northfleet, United KingdomHQ checked Sep 5, 2026	51-200	78
	“We deliver business transformation through technology-enabled change.” Source: company website · checked Sep 5, 2026
19	PENIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	76
	“We’re a specialist, management consultancy, focusing on; Customer Experience, Operational Excellence and Change Delivery, dedicated to helping our clients create real, positive…” Source: company website · checked Sep 5, 2026
20	Change Management GroupIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	74
	“Whether complex transformation is required across your business or you are seeking support with a small project, we are here to help.” Source: company website · checked Sep 5, 2026
21	Sharing In GrowthIndirect evidence	Derby, United KingdomHQ checked Sep 5, 2026	51-200	73
	“Our passionate team of growth and productivity specialists work with you to develop, inspire and improve every aspect of your organisation.” Source: company website · checked Sep 5, 2026
22	ExcellediaStrong evidence	Birmingham, United KingdomHQ checked Sep 5, 2026	51-200	64
	“Excelledia is a management consulting firm that provides insights, organizational transformation, and business strategy through people, process & technology consulting to clients…” Source: company website · checked Sep 5, 2026
23	Catalyst ConsultingIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	63
	“For more than 30 years, Catalyst has partnered with organisations to enable results.” Source: company website · checked Sep 5, 2026
24	ZiiplineIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	59
	“We’re people-first and culture-obsessed.” Source: company website · checked Sep 5, 2026
25	Pink Elephant EmeaIndirect evidence	Reading, United KingdomHQ checked Sep 5, 2026	51-200	56
	“Pink Elephant is an international knowledge leader in the field of business innovation & business change.” Source: company website · checked Sep 5, 2026

Showing 25 of 3,791 process improvement consulting firms based in the United Kingdom

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Process improvement consulting firms based in the United Kingdom at a glance

As of Sep 5, 2026

1-10Median size (employees)

LondonLargest hub · 1190 HQs

1,464Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

3,157

11-50

501

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Verified emails by last verification

0–30

4,830

31–60

286

61–90

90–180

180+

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 process improvement consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “process improvement consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among process improvement 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 an evidence 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, 5,131 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 5, 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.

Process improvement consulting firms by metro

Process improvement consulting firms in London1190
Process improvement consulting firms in Manchester85
Process improvement consulting firms in Birmingham49
Process improvement consulting firms in Bristol48
Process improvement consulting firms in Leeds48
Process improvement consulting firms in Edinburgh42
Process improvement consulting firms in Glasgow38
Process improvement consulting firms in Milton Keynes30
Process improvement consulting firms in Sheffield30
Process improvement consulting firms in Oxford29
Process improvement consulting firms in Reading28
Process improvement consulting firms in Cambridge27
Process improvement consulting firms in Nottingham25

Frequently asked

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

RevenueBase identified 3,791 process improvement 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?

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

Which city has the most process improvement consulting firms?

London leads with 1190 headquartered companies, followed by Manchester (85) and Birmingham (49).

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 5,131 verified decision-maker contacts tracked across these 3,791 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 5, 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.