Company lists · Data refreshed September 2026

Top 25 Testing companies based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 266 companies tracked

RevenueBase identified 266 testing companies headquartered in the United Kingdom as of September 2026 and tracks 34,389 professional contacts across them, including 11,813 with verified work emails. London is the largest hub.

This list covers testing companies 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 21, 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 21, 2026 86% judged on-target in blind review

266Companies

34,389Contacts tracked

11,813Verified emails

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The 25 largest testing companies based in the United Kingdom

Ranked by team size

Top 25 of 266 testing companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to testing companies: 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	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	10001+	23,155 contacts →
	Indirect evidence “Intertek is a leading Total Quality Assurance provider to industries worldwide.” Source: RevenueBase Database · checked Sep 21, 2026
2	Element Materials Technology	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	5,001-10,000	4,200 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
3	Socotec UK & Ireland	Indirect evidence	Burton Upon Trent, United KingdomHQ checked Sep 21, 2026	1,001-5,000	844 contacts →
	Indirect evidence “SOCOTEC UK is a network of industry-leading experts we empower ambitious businesses at every stage of the asset lifecycle.” Source: RevenueBase Database · checked Sep 21, 2026
4	British Engineering Services Group	Strong evidence	Warrington, United KingdomHQ checked Sep 21, 2026	1,001-5,000	776 contacts →
	Strong evidence “Testing, inspection, certification and compliance is our core business so that’s what gets 100% of our focus.” Source: RevenueBase Database · checked Sep 21, 2026
5	Ecogra	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	304 contacts →
	Indirect evidence “At eCOGRA, we are renowned for delivering excellence in quality, speed, and service, with a commitment to supporting your growth.” Source: RevenueBase Database · checked Sep 21, 2026
6	2i	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 21, 2026	201-500	248 contacts →
	Indirect evidence “We help CTOs, Programme Directors, and Engineering Leaders deliver complex technology change safely, on time, under control, and at sustainable cost.” Source: RevenueBase Database · checked Sep 21, 2026
7	Normec I2 Analytical	Strong evidence	Hertfordshire, United KingdomHQ checked Sep 21, 2026	201-500	218 contacts →
	Strong evidence “Founded in 2003, Normec i2 Analytical is one of Europe's leading environmental testing companies providing its customers a comprehensive range of analytical, monitoring and…” Source: RevenueBase Database · checked Sep 21, 2026
8	Echologyx LTD	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	185 contacts →
	Indirect evidence “EchoLogyx started with a simple idea – provide test development and QA support to the Conversion Rate Optimization teams.” Source: RevenueBase Database · checked Sep 21, 2026
9	Warringtonfire	Strong evidence	Warrington, United KingdomHQ checked Sep 21, 2026	201-500	177 contacts →
	Strong evidence “Warringtonfire is proud to be part of Element Materials Technology, the leader in Testing, Inspection, Certification and Calibration services.” Source: RevenueBase Database · checked Sep 21, 2026
10	Kiwa UK	Strong evidence	Cheltenham, United KingdomHQ checked Sep 21, 2026	201-500	161 contacts →
	Strong evidence “Kiwa Ltd is part of the Kiwa Group, a global top 20 Testing, Inspection and Certification (TIC) organisation.” Source: RevenueBase Database · checked Sep 21, 2026
11	Phenna Group	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	5,001-10,000	89 contacts →
	Strong evidence “Phenna Group is a global family of specialist businesses delivering Testing, Inspection, Certification and Compliance (TICC) services to customers worldwide.” Source: RevenueBase Database · checked Sep 21, 2026
12	Normec Latis Scientific	Indirect evidence	Crayford, United KingdomHQ checked Sep 21, 2026	51-200	72 contacts →
	Indirect evidence “Normec Latis Scientific is a market leading provider of laboratory services for a wide range of industries.” Source: RevenueBase Database · checked Sep 21, 2026
13	Minton, Treharne & Davies Group	Strong evidence	Cardiff, United KingdomHQ checked Sep 21, 2026	51-200	66 contacts →
	Strong evidence “The Minton Treharne & Davies Group provide scientific consultancy, surveying and testing services to a worldwide client base from our offices in the UK, USA and Asia.” Source: RevenueBase Database · checked Sep 21, 2026
14	CEMAS	Indirect evidence	Wokingham, United KingdomHQ checked Sep 21, 2026	51-200	63 contacts →
	Indirect evidence “CEMAS is an independent analytical laboratory with over 35 years’ experience supporting the agrochemical, biocide and life science sectors.” Source: RevenueBase Database · checked Sep 21, 2026
15	Tadtelmax	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	62 contacts →
	Strong evidence “TADTELMAX is a Worldwide Testing House Company offering the best in class Mobile Testing Services for an End-to-End Product and Software Homologation.” Source: RevenueBase Database · checked Sep 21, 2026
16	BM Trada Certification	Strong evidence	Hughenden, United KingdomHQ checked Sep 21, 2026	501-1,000	62 contacts →
	Strong evidence “BM TRADA is proud to be part of Element, the market leader in Testing, Inspection, and Certification services.” Source: RevenueBase Database · checked Sep 21, 2026
17	ONE Scientific A Tentamus Company	Strong evidence	Bristol, United KingdomHQ checked Sep 21, 2026	11-50	61 contacts →
	Strong evidence “One Scientific - A Tentamus Company is an independent food and water testing laboratory, UKAS accredited (No.” Source: RevenueBase Database · checked Sep 21, 2026
18	Basec Group Limited Basec	Strong evidence	Milton Keynes, United KingdomHQ checked Sep 21, 2026	51-200	55 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
19	Eurofins E&e UK	Strong evidence	York, United KingdomHQ checked Sep 21, 2026	51-200	53 contacts →
	Strong evidence “Eurofins E&E UK provides a comprehensive range of testing, certification and compliance services for designers and manufacturers of electronic and electrical products.” Source: RevenueBase Database · checked Sep 21, 2026
20	International Associates Limited	Indirect evidence	Glasgow, United KingdomHQ checked Sep 21, 2026	51-200	50 contacts →
	Indirect evidence “International Associates (IA) is a leading provider of assessment, audit, verification, certification and training services.” Source: RevenueBase Database · checked Sep 21, 2026
21	Zigzag QA	Indirect evidence	Abingdon, United KingdomHQ checked Sep 21, 2026	11-50	47 contacts →
	Indirect 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 21, 2026
22	Envirochem Analytical Laboratories LTD	Indirect evidence	Fareham, United KingdomHQ checked Sep 21, 2026	51-200	42 contacts →
	Indirect evidence “At Envirochem, we empower businesses to stay compliant, safe, and efficient with our industry-leading environmental risk mitigation services.” Source: RevenueBase Database · checked Sep 21, 2026
23	SGS GAS Analysis Services	Strong evidence	Stirling, United KingdomHQ checked Sep 21, 2026	51-200	36 contacts →
	Strong evidence “SGS Gas Analysis Services: Specialists in Gas Testing, Instrumentation, Validation and Design.” Source: RevenueBase Database · checked Sep 21, 2026
24	Celnor Group	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	34 contacts →
	Strong evidence “We’re an international service provider in the Testing, Inspection, Certification and Compliance (TICC) sector.” Source: RevenueBase Database · checked Sep 21, 2026
25	Trinitatum	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	31 contacts →
	Indirect evidence “ETRM/CTRM platforms carry the weight of every trade.” Source: RevenueBase Database · checked Sep 21, 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: testing companies. 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 testing companies.
Partial evidence: Its own public description names part of testing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name testing companies. 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 266 testing companies based in the United Kingdom

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Testing companies based in the United Kingdom at a glance

As of Sep 21, 2026

34.4%Verified-email coverage

129.3Average contacts per company

1-10Median size (employees)

21.8%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

134

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 266 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 testing companies, 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 “testing companies”. 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 testing companies), 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 testing companies, 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, 11,813 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 21, 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.

Testing companies by metro

Testing companies in London58

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 testing companies, 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 testing companies are there based in the United Kingdom?

RevenueBase identified 266 testing companies 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 testing companies?

London leads with 58 headquartered companies, followed by Manchester (12) and Reading (5).

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 11,813 verified decision-maker contacts tracked across these 266 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 21, 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.