Company lists · Data refreshed September 2026

Top 25 Quality control consulting firms based in the United Kingdom

Name: Quality control 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 29, 2026 211 companies tracked

RevenueBase identified 211 quality control consulting firms headquartered in the United Kingdom as of September 2026 and tracks 24,499 professional contacts across them, including 7,529 with verified work emails. London is the largest hub.

This list covers quality control 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 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

211Companies

24,499Contacts tracked

7,529Verified emails

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The 25 largest quality control consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 211 quality control consulting firms 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 quality control 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	Intertek	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	10001+	23,155 contacts →
	Partial evidence “Intertek is a leading Total Quality Assurance provider to industries worldwide.” Source: RevenueBase Database · checked Sep 29, 2026
2	Hqts Group	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	1,001-5,000	250 contacts →
	Strong evidence “Since 1987 HQTS has delivered product inspections, factory audits, testing and quality consulting throughout Asia.” Source: RevenueBase Database · checked Sep 29, 2026
3	ROQ	Partial evidence	Chorley, United KingdomHQ checked Sep 29, 2026	51-200	109 contacts →
	Partial evidence “Roq is changing the way the world views Quality.” Source: RevenueBase Database · checked Sep 29, 2026
4	Rephine	Partial evidence	Stevenage, United KingdomHQ checked Sep 29, 2026	51-200	102 contacts →
	Partial evidence “Global experts in quality assurance & GxP compliance across pharmaceutical, biotech & medical device manufacturing supply chains Who is Rephine?” Source: RevenueBase Database · checked Sep 29, 2026
5	Qniverse	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	70 contacts →
	Partial evidence “Qniverse is your trusted Quality Assurance service partner that stands at the forefront of a paradigm shift in QA by redefining quality.” Source: RevenueBase Database · checked Sep 29, 2026
6	Adamas Consulting	Strong evidence	Camberley, United KingdomHQ checked Sep 29, 2026	51-200	68 contacts →
	Strong evidence “ADAMAS Consulting is a global specialist consultancy offering a full range of independent GCP, GVP, GLP, CSC and GMP Quality Assurance and Quality Management services on a global…” Source: RevenueBase Database · checked Sep 29, 2026
7	Zigzag QA	Partial evidence	Abingdon, United KingdomHQ checked Sep 29, 2026	11-50	47 contacts →
	Partial evidence “ZigZag QA is your trusted worldwide quality leader, offering true global reach and unrivaled expertise to reduce risk and efforts.” Source: RevenueBase Database · checked Sep 29, 2026
8	SPGL	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	45 contacts →
	Indirect evidence “ABOUT US Who Are We?” Source: RevenueBase Database · checked Sep 29, 2026
9	Auto-Scan	Partial evidence	Telford, United KingdomHQ checked Sep 29, 2026	501-1,000	44 contacts →
	Partial evidence “AUTOSCAN (UK) LIMITED Provides Quality Inspection, Containment & Quality Engineering Services to the Automotive, Off Highway, and all types of manufacturing industries and their…” Source: RevenueBase Database · checked Sep 29, 2026
10	CS Lifesciences	Indirect evidence	Glasgow, United KingdomHQ checked Sep 29, 2026	11-50	35 contacts →
	Indirect evidence “CS Lifesciences is an award-winning enterprise regulatory strategy consultancy, rated #1 in the US, and trusted by Fortune 500 companies, leading medtech firms, and diagnostics…” Source: RevenueBase Database · checked Sep 29, 2026
11	Riverark Limited	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	20 contacts →
	Partial evidence “RiverArk is a Global Quality Consultancy providing comprehensive services in GxP domain.” Source: RevenueBase Database · checked Sep 29, 2026
12	QRC Consultants LTD	Partial evidence	St Ives, United KingdomHQ checked Sep 29, 2026	11-50	18 contacts →
	Partial evidence “WHO WE ARE QRC Consultants Ltd is a team of experienced QA, regulatory and clinical research professionals, dedicated to providing high quality, practical, responsive and cost…” Source: RevenueBase Database · checked Sep 29, 2026
13	Verif-I	Partial evidence	Reading, United KingdomHQ checked Sep 29, 2026	11-50	18 contacts →
	Partial evidence “Verif-i is a leading Integrated Seismic Survey Management company offering high-quality independent consultancy, project management and QC services aiding our clients to achieve…” Source: RevenueBase Database · checked Sep 29, 2026
14	Tower Mains	Partial evidence	Edinburgh, United KingdomHQ checked Sep 29, 2026	11-50	14 contacts →
	Partial evidence “Founded in 2001 by Dr Andrew Waddell, Tower Mains Ltd offers bespoke audit, consultancy, training, and quality assurance services to the clinical, healthcare, life sciences…” Source: RevenueBase Database · checked Sep 29, 2026
15	Imed Consultancy LTD	Strong evidence	Bloxham, United KingdomHQ checked Sep 29, 2026	11-50	13 contacts →
	Strong evidence “We are a medical device regulatory and quality consulting team working with people and their companies to navigate the minefield of todays global medical device regulations to…” Source: RevenueBase Database · checked Sep 29, 2026
16	RPG Qaqc	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 29, 2026	11-50	13 contacts →
	Indirect evidence “International QAQC Services” Source: RevenueBase Database · checked Sep 29, 2026
17	PQP Group	Indirect evidence	Leighton Buzzard, United KingdomHQ checked Sep 29, 2026	11-50	13 contacts →
	Indirect evidence “Pharmaceutical Manufacturing consultancy firm.” Source: RevenueBase Database · checked Sep 29, 2026
18	Handwells Limited	Partial evidence	Burntwood, United KingdomHQ checked Sep 29, 2026	11-50	8 contacts →
	Partial evidence “Selecting Handwells as your partner for construction assurance services, Clients stand to benefit from our expertise in the precast concrete industry, rigorous quality assurance…” Source: RevenueBase Database · checked Sep 29, 2026
19	JW Quality Consulting LTD	Strong evidence	Market Harborough, United KingdomHQ checked Sep 29, 2026	1-10	8 contacts →
	Strong evidence “JW Quality Consulting Ltd work with clinical trial sponsors and pharmaceutical manufacturers, providing high quality consulting services that cover all aspects of Quality within…” Source: RevenueBase Database · checked Sep 29, 2026
20	Salus Safety Solutions	Partial evidence	Lanark, United KingdomHQ checked Sep 29, 2026	1-10	7 contacts →
	Partial evidence “Salus Safety Solutions Ltd is a vibrant health, safety, quality and environmental organisation who are in a position to provide a comprehensive, quality service at very…” Source: RevenueBase Database · checked Sep 29, 2026
21	PTR	Partial evidence	Loanhead, United KingdomHQ checked Sep 29, 2026	11-50	6 contacts →
	Partial evidence “Our core business is providing Quality Surveillance, QC Inspection and Technical Staffing Services to the energy sectors.” Source: RevenueBase Database · checked Sep 29, 2026
22	It'sqa Associates Limited	Partial evidence	South Croydon, United KingdomHQ checked Sep 29, 2026	11-50	6 contacts →
	Partial evidence “A global network of expert auditors, trusted by sponsors who care about quality.” Source: RevenueBase Database · checked Sep 29, 2026
23	Zigzag Associates LTD	Partial evidence	Abingdon, United KingdomHQ checked Sep 29, 2026	11-50	5 contacts →
	Partial evidence “Founded in 2009, Zigzag is a privately-owned global leader in Quality Assurance.” Source: RevenueBase Database · checked Sep 29, 2026
24	Digital Quality Associates	Partial evidence	Buckinghamshire, United KingdomHQ checked Sep 29, 2026	1-10	3 contacts →
	Partial evidence “DQA provides specialist quality assurance consultancy, auditing, and validation services to pharmaceutical, biotech, medical device, and healthcare organisations worldwide.” Source: RevenueBase Database · checked Sep 29, 2026
25	Compass QMS LTD	Indirect evidence	Stafford, United KingdomHQ checked Sep 29, 2026	1-10	3 contacts →
	Indirect evidence “Providing expert guidance and support to organisations in their pursuit of excellence.” 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: quality control 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 quality control consulting firms.
Partial evidence: Its own public description names part of quality control consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name quality control 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 211 quality control consulting firms based in the United Kingdom

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Quality control consulting firms based in the United Kingdom at a glance

As of Sep 29, 2026

30.7%Verified-email coverage

116.1Average contacts per company

1-10Median size (employees)

19.4%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

172

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 211 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 quality control 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 “quality control 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 quality control 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 quality control 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, 7,529 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.

Quality control consulting firms by metro

Quality control consulting firms in London41

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 quality control 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 quality control consulting firms are there based in the United Kingdom?

RevenueBase identified 211 quality control 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?

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

Which city has the most quality control consulting firms?

London leads with 41 headquartered companies, followed by Glasgow (7) and Oxford (6).

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 7,529 verified decision-maker contacts tracked across these 211 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.