Company lists · Data refreshed October 2026

Top 25 Certification services based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Oct 23, 2026 294 companies tracked

RevenueBase identified 294 company matches for certification services associated with the United Kingdom as of October 2026 and tracks 33,789 professional contacts across them, including 11,639 with verified work emails. London is the largest hub.

This list covers company matches for certification 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 October 23, 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 Oct 23, 2026 How this list was built

294Companies

33,789Contacts tracked

11,639Verified emails

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The 25 largest certification services based in the United Kingdom

Ranked by team size

Top 25 of 294 company matches for certification services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 23, 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 Oct 23, 2026	10001+	24,130 contacts →
	Exact match “Intertek is a leading Total Quality Assurance provider to industries worldwide.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
2	Element Materials Technology	Exact match	London, United KingdomHQ recorded Oct 23, 2026	5,001-10,000	4,423 contacts →
	Exact match “The Element Materials Technology Group is one of the world’s leading global providers of testing, inspection, and certification services for a diverse range of products…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
3	British Engineering Services Group	Exact match	Warrington, United KingdomHQ recorded Oct 23, 2026	1,001-5,000	775 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 · Oct 23, 2026 · View company records in RevenueBase
4	UKAS	Exact match	Staines-upon-thames, United KingdomHQ recorded Oct 23, 2026	201-500	458 contacts →
	Exact match “UKAS is the world’s leading #accreditation body delivering confidence in products and services, and supporting global value chains.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
5	The Citation Group	Exact match	Wilmslow, United KingdomHQ recorded Oct 23, 2026	1,001-5,000	313 contacts →
	Exact match “The Citation Group offer unrivalled compliance and quality services to over businesses across the UK, Australia, New Zealand, and Canada.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
6	NQA	Exact match	Dunstable, United KingdomHQ recorded Oct 23, 2026	501-1,000	276 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 · Oct 23, 2026 · View company records in RevenueBase
7	Ascertia	Exact match	City Of London, United KingdomHQ recorded Oct 23, 2026	51-200	213 contacts →
	Exact match “Since 2001, Ascertia has been a global leader in delivering high-trust e-security products focusing on: Digital Signatures \| Timestamps \| Evidence Archiving \| OCSP Validation…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
8	Amtivo Group	Exact match	West Malling, United KingdomHQ recorded Oct 23, 2026	201-500	148 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 · Oct 23, 2026 · View company records in RevenueBase
9	Isoqar	Exact match	Manchester, United KingdomHQ recorded Oct 23, 2026	51-200	142 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 · Oct 23, 2026 · View company records in RevenueBase
10	Stroma Certification	Exact match	Wakefield, United KingdomHQ recorded Oct 23, 2026	201-500	126 contacts →
	Exact match “Elmhurst Energy and Stroma Certification have merged.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
11	Citation ISO Certification	Exact match	Norwich, United KingdomHQ recorded Oct 23, 2026	51-200	118 contacts →
	Exact match “We believe in keeping ISO certification simple, so that's exactly what we do.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
12	BRCGS	Exact match	London, United KingdomHQ recorded Oct 23, 2026	51-200	107 contacts →
	Exact match “BRCGS is a leading brand and consumer protection organisation, used by certificated suppliers over 130 countries, with certification issued through a global network of accredited…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
13	Phenna Group	Exact match	London, United KingdomHQ recorded Oct 23, 2026	5,001-10,000	106 contacts →
	Exact match “Phenna Group is a global family of specialist businesses delivering Testing, Inspection, Certification and Compliance (TICC) services to customers worldwide.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
14	ERM CVS	Exact match	London, United KingdomHQ recorded Oct 23, 2026	51-200	102 contacts →
	Exact match “ERM CVS provides science-based, independent assurance, verification certification and training services for the world’s leading organizations.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
15	APM Group	Exact match	High Wycombe, United KingdomHQ recorded Oct 23, 2026	51-200	91 contacts →
	Exact match “We are a global leader for best practice solutions.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
16	Irca International Register Of Certificated Auditors	Exact match	London, United KingdomHQ recorded Oct 23, 2026	11-50	84 contacts →
	Exact match “Your partners in quality.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
17	BM Trada Certification	Exact match	Hughenden, United KingdomHQ recorded Oct 23, 2026	501-1,000	61 contacts →
	Exact match “BM TRADA is proud to be part of Element, the market leader in Testing, Inspection, and Certification services.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
18	Basec Group Limited Basec	Exact match	Milton Keynes, United KingdomHQ recorded Oct 23, 2026	51-200	60 contacts →
	Exact match “BASEC Group Limited, a part of Kiwa, is a global leader in product testing and certification services for power, energy, data/signal cables and ancillary products, in addition to…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
19	International Associates Limited	Exact match	Glasgow, United KingdomHQ recorded Oct 23, 2026	51-200	54 contacts →
	Exact match “International Associates (IA) is a leading provider of assessment, audit, verification, certification and training services.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
20	XDS Solutions	Exact match	Witham, United KingdomHQ recorded Oct 23, 2026	51-200	37 contacts →
	Exact match “XDS Solutions is an ISO 17065 SASO-notified certification body, with a wide technical scope covering Europe, Middle East, Africa, and Asia.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
21	SSAIB	Exact match	Whitley Bay, United KingdomHQ recorded Oct 23, 2026	51-200	35 contacts →
	Exact match “SSAIB (Security Systems and Alarms Inspection Board) is the leading certification body for organisations providing security systems and services, fire detection and alarm systems…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
22	Clear Quality Limited	Exact match	Rotherham, United KingdomHQ recorded Oct 23, 2026	11-50	31 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 · Oct 23, 2026 · View company records in RevenueBase
23	Centre For Assessment LTD	Exact match	Manchester, United KingdomHQ recorded Oct 23, 2026	11-50	29 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 · Oct 23, 2026 · View company records in RevenueBase
24	DCD Academy	Exact match	London, United KingdomHQ recorded Oct 23, 2026	11-50	29 contacts →
	Exact match “DCD Academy is the data center industry’s premier workforce development partner.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
25	TWI Certification LTD	Exact match	Cambridge, United KingdomHQ recorded Oct 23, 2026	11-50	23 contacts →
	Exact match “TWI Certification Ltd (TWI CL), is a wholly-owned subsidiary of The Welding Institute (TWI), formed in 1993 to exemplify the independence and impartiality required to deliver…” Recorded in the RevenueBase company graph · Oct 23, 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 “certification 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 294 certification services based in the United Kingdom

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Certification services based in the United Kingdom at a glance

As of Oct 23, 2026

34.4%Verified-email coverage

114.9Average contacts per company

1-10Median size (employees)

26.2%Largest-city concentration · London

Oct 23, 2026Page data refreshed

Companies by employee count

1-10

171

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 294 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 “certification 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 11,639 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 October 23, 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.

Certification services by metro

Certification services in London77

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 “certification services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many certification services are there based in the United Kingdom?

RevenueBase identified 294 company matches for certification services associated with the United Kingdom as of October 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 certification services?

London leads with 77 company records, followed by Manchester (10) and Leeds (4).

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 11,639 professional contacts with verified work emails tracked across these 294 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 October 23, 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.