Company lists · Data refreshed September 2026
Top 25 Six sigma consulting firms based in the United Kingdom
RevenueBase identified 113 six sigma consulting firms headquartered in the United Kingdom as of September 2026 and tracks 795 professional contacts across them, including 85 with verified work emails and 29 with mobile numbers. London is the largest hub.
This list covers six sigma 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 6, 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.
The 25 largest six sigma consulting firms based in the United Kingdom
Ranked by team size| # | Company | RevenueBase Smart Search | Contacts | ||
|---|---|---|---|---|---|
| 1 | Indirect evidence | 20 contacts → | |||
“We are passionate about improving our client’s operations.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | Strong evidence | 18 contacts → | |||
“Kaizen Consultancy & Training Services Based on the Wirral, UK Help manufacturers continually improve Application of Lean, Six Sigma & Total Productive Maintenance (TPM) Proven…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | Indirect evidence | 16 contacts → | |||
“Our goal is to help organisations run more effective management systems, improve the quality of their products and services, and support them in achieving their own goals.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | Indirect evidence | 12 contacts → | |||
“If you’re fed up with your business not operating at it’s full potential, then you’re not alone.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | Strong evidence | 8 contacts → | |||
“The Six Sigma Management Institute was founded by Dr.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | Strong evidence | 7 contacts → | |||
“Lean Six Sigma Training Ltd is an international Lean Six Sigma training provider based in the UK.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | Strong evidence | 7 contacts → | |||
“HHAcademy sviluppa e certifica competenze di EXecutional EXcellence- miglioramento continuo- riduzione della variabilità di processo (six sigma)- aggressione delle attività senza…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | Partial evidence | 6 contacts → | |||
“We’re proud to announce our work with food and packaging industries around the world to improve productivity and drive continuous improvement using lean 6 sigma methodologies…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | Indirect evidence | 6 contacts → | |||
“We are a boutique consultancy specialising in helping businesses succeed.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | Partial evidence | 5 contacts → | |||
“Nishtha Business Services Limited (NBSL) is a Management Consulting firm; a one-stop solution for Strategic, Operational, Digital, Learning & Development services, specialising in…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | Strong evidence | 5 contacts → | |||
“We provide Lean Six Sigma training courses to Introductory, Champion, Yellow Belt, Green Belt, Black Belt and Master Black Belt (MBB) certification levels facilitate the drive for…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | Indirect evidence | 5 contacts → | |||
“MPL is a consultancy specialising in improving organisational and operational performance through the introduction of best practice, cultural and behavioural change.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | Partial evidence | 5 contacts → | |||
“Vetsa Consulting Services Ltd.(VCSL) is a boutique transformation consulting firm helping organisations improve operational efficiency and deliver complex transformation…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | Strong evidence | 5 contacts → | |||
“ScaledIQ consultants are dedicated to supporting small, medium and Large sized businesses with IT, Agile and Lean Six Sigma consulting.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | Strong evidence | 4 contacts → | |||
“Sigmoid Consulting is the result of 18 years of Scientific Research, Experiential Learning and Global Benchmarking in the field of "Human Performance Excellence and Lean Six Sigma…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | Indirect evidence | 4 contacts → | |||
“My Vision To support organisations in the implementation of OHSAS 18001 Safety Management Systems, ISO 9001 Quality Management Systems, ISO 14001 Environmental Management Systems…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | Indirect evidence | 3 contacts → | |||
“Shodann - simply delivering quality Shodann came to life in 2012, innovated by two experts in providing software and business solutions to companies wishing to grow through…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | Partial evidence | 2 contacts → | |||
“The Cambio Group proposition consists of three award winning services: Consulting, Training and Recruitment.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | Indirect evidence | 2 contacts → | |||
“The LPI Institute was established with the mission to guide law firms and legal service providers in their journey of transformation, enabling them to maintain competitiveness…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | Indirect evidence | 2 contacts → | |||
“OPEX Selection is a specialist recruitment consultancy established in 2009 and based in Harrogate, England.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | Strong evidence | 2 contacts → | |||
“Creative Difference Training is a South Wales-based organisational development consultancy, delivering Lean Six Sigma and continuous improvement training across the UK.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | Strong evidence | 2 contacts → | |||
“Business consultancy specialising in process and product improvement includes extensive knowledge of the following: Six sigma (Product Development) Lean for services, including…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | Indirect evidence | 2 contacts → | |||
“Clive Poole is a Japanese trained TPM Sensei with a track record of over 15 years outstanding success improving business bottom line performance.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | Strong evidence | 2 contacts → | |||
“The Institute of Six Sigma Professionals was established in 2011 in order to link like-minded people with an interest in Six Sigma around the UK.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | Strong evidence | 2 contacts → | |||
“Leanscape.io is a global consultancy and training provider of Lean Six Sigma management principles for corporates and professional individuals looking to develop their adaptive…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
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: six sigma 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 six sigma consulting firms.
- Partial evidence
- Its own public description names part of six sigma consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name six sigma 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 113 six sigma consulting firms based in the United Kingdom
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 85 reachable decision-makers.
Free signup · no credit card
Six sigma consulting firms based in the United Kingdom at a glance
As of Sep 6, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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 six sigma 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 “six sigma 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 six sigma 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 six sigma 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, 85 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 6, 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.
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 six sigma 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 six sigma consulting firms are there based in the United Kingdom?
RevenueBase identified 113 six sigma 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?
Bourton Group LLP, headquartered in Northampton, tops this list with the largest team on record.
Which city has the most six sigma consulting firms?
London leads with 18 headquartered companies, followed by Chester (3) and Cardiff (2).
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 85 verified decision-maker contacts tracked across these 113 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 6, 2026.
Ready to reach these companies? Verified emails and direct dials for all 113 six sigma consulting firms based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Six sigma consulting firms by geography
- Six sigma consulting firms based in the United States
- Six sigma consulting firms based in Brazil
- Six sigma consulting firms based in Canada
- Six sigma consulting firms based in the Netherlands
- Six sigma consulting firms based in Germany
- Six sigma consulting firms based in France
- Six sigma consulting firms based in Australia
- Six sigma consulting firms based in Italy
Browse the directory
Browse: Companies home · All United Kingdom lists · All Six sigma consulting firms lists · New lists
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Six sigma consulting firms based in the United States
- Six sigma consulting firms based in Brazil
- Six sigma consulting firms based in Canada
- Six sigma consulting firms based in the Netherlands
- Six sigma consulting firms based in Germany
- Six sigma consulting firms based in France