Company lists · Data refreshed November 2026

Top 25 Certification and accreditation services based in the United Kingdom

RevenueBase identified 138 company matches for certification and accreditation services associated with the United Kingdom as of November 2026 and tracks 52,486 professional contacts across them, including 15,567 with verified work emails. London is the largest hub.

This list covers company matches for certification and accreditation 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 November 6, 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 Nov 6, 2026 How this list was built
138Companies
52,486Contacts tracked
15,567Verified emails
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The 25 largest certification and accreditation services based in the United Kingdom

Ranked by team size
Top 25 of 138 company matches for certification and accreditation services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchParis, United KingdomHQ recorded Nov 6, 202610001+50,489 contacts →

Exact match

“Bureau Veritas is a world leader in Testing, Inspection and Certification.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchStaines-upon-thames, United KingdomHQ recorded Nov 6, 2026201-500471 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 · Nov 6, 2026 · View company records in RevenueBase
3Exact matchWest Malling, United KingdomHQ recorded Nov 6, 2026201-500158 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 · Nov 6, 2026 · View company records in RevenueBase
4Exact matchHigh Wycombe, United KingdomHQ recorded Nov 6, 202651-20095 contacts →

Exact match

“We are a global leader for best practice solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchHughenden, United KingdomHQ recorded Nov 6, 2026501-1,00062 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 · Nov 6, 2026 · View company records in RevenueBase
6Exact matchGlasgow, United KingdomHQ recorded Nov 6, 202651-20055 contacts →

Exact match

“International Associates (IA) is a leading provider of assessment, audit, verification, certification and training services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchWhitley Bay, United KingdomHQ recorded Nov 6, 202651-20044 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 · Nov 6, 2026 · View company records in RevenueBase
8Exact matchSolihull, United KingdomHQ recorded Nov 6, 202611-5036 contacts →

Exact match

“ecmk is a leading Government approved Accreditation provider for the Energy and Property Assessment Industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchManchester, United KingdomHQ recorded Nov 6, 202611-5031 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 · Nov 6, 2026 · View company records in RevenueBase
10Exact matchCambridge, United KingdomHQ recorded Nov 6, 202611-5024 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 · Nov 6, 2026 · View company records in RevenueBase
11Exact matchHarpenden, United KingdomHQ recorded Nov 6, 20261-1024 contacts →

Exact match

“Launched in 2010, ADISA is a UKAS accredited certification body operating including certification to a Standard 8.0 which is a UK GDPR Certification Scheme formally recognised by…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchJarrow, United KingdomHQ recorded Nov 6, 20261-1023 contacts →

Exact match

“The certification body of choice for the built environment.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchWinchester, United KingdomHQ recorded Nov 6, 202611-5020 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 · Nov 6, 2026 · View company records in RevenueBase
14Exact matchDarlington, United KingdomHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“QA International Certification Limited is an accredited certification body issuing internationally recognised accredited certificates to companies across a wide range of…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-1017 contacts →

Exact match

“CHAS, SAFE CONTRACTOR, CONSTRUCTIONLINE, SMAS, BUILDER'S PROFILE, ACCLAIM, EXOR AND ALTIUS Health & Safety Accreditation Consultants.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchThornaby, United KingdomHQ recorded Nov 6, 202611-5016 contacts →

Exact match

“ASIC - Accreditation Service for International Schools, Colleges & Universities Who we are: UK based with an international outlook, ASIC is an independent, government-approved…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-20015 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 · Nov 6, 2026 · View company records in RevenueBase
18Exact matchCartmel, United KingdomHQ recorded Nov 6, 202611-5013 contacts →

Exact match

“MSS Global - UKAS Accredited Certification Body (CB) with specialism in assurance of ethical management practices, environmental-social-governance (ESG) assurance, and management…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchWakefield, United KingdomHQ recorded Nov 6, 20261-1010 contacts →

Exact match

“We have an enviable reputation for helping companies achieve Accreditations and Certifications.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchAintree, United KingdomHQ recorded Nov 6, 202611-509 contacts →

Exact match

“World Certification Services Limited (WCS) is a UKAS & ANAB Accredited Certification Body based in Liverpool, UK with representatives in the USA, Italy, Malaysia, Thailand, Turkey…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchWalsall, United KingdomHQ recorded Nov 6, 20261-109 contacts →

Exact match

“PQAL is a UKAS Accredited Certification Body, offering affordable Certification Services (ISO 9001, ISO 14001, ISO 45001, ISO/IEC 27001, SSIP, PAS 43, NHSS 17 & 17B) worldwide.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchBallinderry Road, United KingdomHQ recorded Nov 6, 202611-508 contacts →

Exact match

“SCS provide accredited certification services which add value to Client organisations by challenging their management systems, in accordance with the relevant standard and in…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchManchester, United KingdomHQ recorded Nov 6, 202611-508 contacts →

Exact match

“3core2 Certification Ltd is a certification body dual accredited with both UKAS (United Kingdom Accreditation Service) and IAS (International Accreditation Service), demonstrating…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-105 contacts →

Exact match

“As a distinguished UK National Cyber Security Center (NCSC) Assured Services Provider and an authorised certification body for esteemed credentials such as Cyber Essentials, Cyber…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchNottingham, United KingdomHQ recorded Nov 6, 20261-105 contacts →

Exact match

“The Swift team come from a variety of business backgrounds.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 138 certification and accreditation services based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 15,567 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Certification and accreditation services based in the United Kingdom at a glance

As of Nov 6, 2026
29.7%Verified-email coverage
380.3Average contacts per company
1-10Median size (employees)
28.3%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
75
11-50
39
51-200
13
201-500
4
501-1,000
4
10001+
1

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 138 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 and accreditation 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 15,567 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 November 6, 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.

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

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

RevenueBase identified 138 company matches for certification and accreditation services associated with the United Kingdom as of November 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?

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

Which city has the most certification and accreditation services?

London leads with 39 company records, followed by Manchester (4) and Leicester (3).

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 15,567 professional contacts with verified work emails tracked across these 138 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 November 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 138 certification and accreditation services based in the United Kingdom. Start with a free account, no credit card.

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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.