Company lists · Data refreshed September 2026

Top 25 Process improvement consulting firms based in London, United Kingdom

Name: Process improvement consulting firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 1,190 companies tracked

RevenueBase identified 1,190 process improvement consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 9,629 professional contacts across them, including 2,609 with verified work emails. London is the largest hub.

This list covers process improvement consulting firms headquartered in London, 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

1,190Companies

9,629Contacts tracked

2,609Verified emails

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The 25 largest process improvement consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 1,190 process improvement consulting firms based in London, 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	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
4	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
5	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
6	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
7	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
8	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
9	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
10	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
11	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
12	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
13	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
14	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
15	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
16	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
17	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
18	TH NKIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	n/a	41
	“You can now find us over at EPAM Continuum.” Source: company website · checked Sep 5, 2026
19	SynapxPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	40
	“Award-winning global consulting experts, blending top-tier consulting and development skills with a cross-functional team, including MVPs who are delivering cost-effective…” Source: company website · checked Sep 5, 2026
20	Regency Grove ConsultantsIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	38
	“At Regency Grove we pride ourselves on providing each client with an exceptional standard of service to suit their specific needs and requirements.” Source: company website · checked Sep 5, 2026
21	Market Intelligence InternationalIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	35
	“Market Intelligence International (Marketii) is a trusted advisor to the world’s leading organizations in technology, medical devices, and consumer products.” Source: company website · checked Sep 5, 2026
22	The Agency BlueprintIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	34
	“I help recruiters build systemised recruitment businesses that run without burnout.” Source: company website · checked Sep 5, 2026
23	Maple NetworksIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	30
	“We’re the team that the IT leaders of tech-dependant organisations come to when they need to really shake things up, innovate (effectively), and tackle their transformational…” Source: company website · checked Sep 5, 2026
24	Searchlight ConsultingIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	30
	“Searchlight is an independent consultancy focused on building business capabilities and leveraging technology to drive business transformation.” Source: company website · checked Sep 5, 2026
25	Egremont GroupIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	29
	“Egremont Group is a globally recognised, award-winning consultancy that helps organisations achieve breakthrough transformation.” Source: company website · checked Sep 5, 2026

Showing 25 of 1,190 process improvement consulting firms based in London, United Kingdom

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Process improvement consulting firms based in London, United Kingdom at a glance

As of Sep 5, 2026

1-10Median size (employees)

LondonLargest hub · 1190 HQs

Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

896

11-50

227

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United Kingdom list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for London, over 1,190 companies.

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 London, 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 London 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, 2,609 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 in the United Kingdom

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 London, United Kingdom?

RevenueBase identified 1,190 process improvement consulting firms headquartered in London, 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 2,609 verified decision-maker contacts tracked across these 1,190 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.