Company lists · Data refreshed September 2026

Top 25 Iso audit services based in the United Kingdom

Name: Iso audit services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 415 companies tracked

RevenueBase identified 415 company matches for iso audit services associated with the United Kingdom as of September 2026 and tracks 26,883 professional contacts across them, including 8,523 with verified work emails. London is the largest hub.

This list covers company matches for iso audit services associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 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 RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built

415Companies

26,883Contacts tracked

8,523Verified emails

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The 25 largest iso audit services based in the United Kingdom

Ranked by team size

Top 25 of 415 company matches for iso audit services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Intertek	Exact match	London, United KingdomHQ recorded Sep 28, 2026	10001+	23,155 contacts →
	Exact match “Intertek is a leading Total Quality Assurance provider to industries worldwide.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	British Engineering Services Group	Exact match	Warrington, United KingdomHQ recorded Sep 28, 2026	1,001-5,000	776 contacts →
	Exact match “Testing, inspection, certification and compliance is our core business so that’s what gets 100% of our focus.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	NQA	Exact match	Dunstable, United KingdomHQ recorded Sep 28, 2026	501-1,000	267 contacts →
	Exact match “NQA is a leading global certification body, respected for providing flexible and supportive certification and training services that are technically advanced and meet the needs of…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Amtivo Group	Exact match	West Malling, United KingdomHQ recorded Sep 28, 2026	201-500	138 contacts →
	Exact match “Amtivo Group provides expert certification services for ISO standards, as well as training and related services.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Citation ISO Certification	Exact match	Norwich, United KingdomHQ recorded Sep 28, 2026	51-200	115 contacts →
	Exact match “We believe in keeping ISO certification simple, so that's exactly what we do.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Isoqar	Exact match	Manchester, United KingdomHQ recorded Sep 28, 2026	51-200	99 contacts →
	Exact match “Our reputation for providing outstanding service explains why clients who joined us when we first opened our doors in 1993 are still with us today.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Irca International Register Of Certificated Auditors	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	88 contacts →
	Exact match “Your partners in quality.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	International Associates Limited	Exact match	Glasgow, United KingdomHQ recorded Sep 28, 2026	51-200	50 contacts →
	Exact match “International Associates (IA) is a leading provider of assessment, audit, verification, certification and training services.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	GCS Compliance	Exact match	Rochester, United KingdomHQ recorded Sep 28, 2026	11-50	47 contacts →
	Exact match “GCS Compliance Ltd are a specialist independent auditing company providing quality safety, expert technical, compliance management consultancy services and professional training…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Centre For Assessment LTD	Exact match	Manchester, United KingdomHQ recorded Sep 28, 2026	11-50	34 contacts →
	Exact match “Centre for Assessment Ltd is a leading certification body, delivering audits and assessments to thousands of clients both nationally and internationally.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Occam Group	Exact match	Bristol, United KingdomHQ recorded Sep 28, 2026	11-50	30 contacts →
	Exact match “Providers of proportionate and pragmatic integrated assurance support, advice and audit.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Clear Quality Limited	Exact match	Rotherham, United KingdomHQ recorded Sep 28, 2026	11-50	28 contacts →
	Exact match “Clear Quality is a professional ISO Consultancy business and Prime Training provider based in South Yorkshire.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Control Union UK	Exact match	Winchester, United KingdomHQ recorded Sep 28, 2026	11-50	22 contacts →
	Exact match “Control Union (UK) is an independent, accredited certification and inspection body helping businesses confidently navigate sustainability.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Simply Certification	Exact match	Jarrow, United KingdomHQ recorded Sep 28, 2026	1-10	21 contacts →
	Exact match “The certification body of choice for the built environment.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	ATC International Group LTD	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	21 contacts →
	Exact match “ATC International is based in the United Kingdom and provides international conformity assessment and certification services across the world.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Compliancepath An Ideagen Company	Exact match	Glasgow, United KingdomHQ recorded Sep 28, 2026	501-1,000	20 contacts →
	Exact match “CompliancePath is the Software Assurance and GRC professional services arm of Ideagen PLC.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Bemcon	Exact match	Manchester, United KingdomHQ recorded Sep 28, 2026	51-200	19 contacts →
	Exact match “Business Excellence & Management Consortium (BEMCON) is a professional training, consulting, and auditing organization specializing in ISO standards, occupational health & safety…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	CQS Certified Quality Systems Limited	Exact match	Malvern, United KingdomHQ recorded Sep 28, 2026	11-50	18 contacts →
	Exact match “CQS (Certified Quality Systems) Ltd delivers straightforward, practical ISO certification with over 25 years of experience.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	CFE Certification	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	18 contacts →
	Exact match “We provide a wide range of auditing, certification and gap analysis services on; AI, DORA, NIS2, Information Security, Business Continuity, International IT Service, GDPR and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Aviso Consultancy LTD	Exact match	Southwark, United KingdomHQ recorded Sep 28, 2026	11-50	17 contacts →
	Exact match “AvISO Consultancy helps organisations build management systems that genuinely work in practice.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Blackmores UK LTD	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	17 contacts →
	Exact match “ISO Standards can help you improve efficiency, reduce costs and increase tender opportunities.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Glocert International	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	14 contacts →
	Exact match “Glocert International is an emerging leader in the Testing, Inspection and Certification (TIC) industry.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Quadra LTD	Exact match	Holywood, United KingdomHQ recorded Sep 28, 2026	11-50	13 contacts →
	Exact match “Quadra is a management systems consultancy and training organisation specialising in implementing management systems to international standards to include: Quality (ISO…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Candy Management Consultants	Exact match	Stockport, United KingdomHQ recorded Sep 28, 2026	1-10	13 contacts →
	Exact match “Candy Management Consultants has been aiding companies in attaining ISO Certification and ensuring Health and Safety compliance since 2017.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Lucideon Cics	Exact match	Stoke On Trent, United KingdomHQ recorded Sep 28, 2026	11-50	12 contacts →
	Exact match “Lucideon CICS Limited provides sustainability assurance, management systems certification, product certification and training Assurance Services include third party independent…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “iso audit services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 415 iso audit services based in the United Kingdom

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Iso audit services based in the United Kingdom at a glance

As of Sep 28, 2026

31.7%Verified-email coverage

64.8Average contacts per company

1-10Median size (employees)

17.1%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

312

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 415 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with the United Kingdom whose business descriptions match “iso audit services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 8,523 professional contacts with verified work emails across the full matched dataset. 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 28, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Iso audit services by metro

Iso audit services in London71

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “iso audit services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many iso audit services are there based in the United Kingdom?

RevenueBase identified 415 company matches for iso audit services associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Intertek tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most iso audit services?

London leads with 71 company records, followed by Manchester (15) and Glasgow (6).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 8,523 professional contacts with verified work emails tracked across these 415 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 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.