Company lists · Data refreshed September 2026

Top 25 Embedded software testing companies based in the United Kingdom

Name: Embedded software 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 28, 2026 127 companies tracked

RevenueBase identified 127 embedded software testing companies headquartered in the United Kingdom as of September 2026 and tracks 3,417 professional contacts across them, including 585 with verified work emails. London is the largest hub.

This list covers embedded software 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 28, 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 28, 2026 86% judged on-target in blind review

127Companies

3,417Contacts tracked

585Verified emails

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The 25 largest embedded software testing companies based in the United Kingdom

Ranked by team size

Top 25 of 127 embedded software testing companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to embedded software 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	2i	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 28, 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 28, 2026
2	Rapita Systems	Partial evidence	York, United KingdomHQ checked Sep 28, 2026	51-200	64 contacts →
	Partial evidence “Rapita Systems is a leading supplier of software verification tools and services, providing quality solutions to the global high-integrity aerospace and automotive electronics…” Source: RevenueBase Database · checked Sep 28, 2026
3	Tadtelmax	Strong evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
4	Amfax LTD	Indirect evidence	Blandford Forum, United KingdomHQ checked Sep 28, 2026	51-200	52 contacts →
	Indirect evidence “Amfax is a world class test system solutions provider, delivering high quality, high performance and cost effective automated test equipment to the aerospace, defence, rail &…” Source: RevenueBase Database · checked Sep 28, 2026
5	XJTAG	Indirect evidence	Cambridge, United KingdomHQ checked Sep 28, 2026	11-50	44 contacts →
	Indirect evidence “XJTAG is a world leading producer of automated test equipment, with a wide range of tools for complex debug, test and programming.” Source: RevenueBase Database · checked Sep 28, 2026
6	Bluefruit Software	Strong evidence	Redruth, United KingdomHQ checked Sep 28, 2026	51-200	41 contacts →
	Strong evidence “Bluefruit Software’s UK-based embedded specialists work with innovative clients worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
7	Kudos Games Services	Partial evidence	Doncaster, United KingdomHQ checked Sep 28, 2026	51-200	37 contacts →
	Partial evidence “At Kudos QA, we are committed to delivering top-tier software and gaming quality assurance, ensuring optimal performance, reliability, and user satisfaction across diverse…” Source: RevenueBase Database · checked Sep 28, 2026
8	Phixos	Partial evidence	Worcester, United KingdomHQ checked Sep 28, 2026	11-50	29 contacts →
	Partial evidence “Since 1990, Phixos has supported major programmes through the development, verification and certification of high integrity software, HMI and firmware solutions in partnership…” Source: RevenueBase Database · checked Sep 28, 2026
9	Elite Interfaces LTD	Indirect evidence	Reading, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “Elite Interfaces Ltd are specialists in the supply, design and manufacture of Test Solutions and Services for the Electronics Manufacturing Industry ranging from Flying Probe…” Source: RevenueBase Database · checked Sep 28, 2026
10	ATE Solutions LTD	Partial evidence	Blisworth, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial evidence “We are the UK’s leading provider of automated testing solutions for electronic and electrical products.” Source: RevenueBase Database · checked Sep 28, 2026
11	Reltech Limited	Indirect evidence	Dursley, United KingdomHQ checked Sep 28, 2026	11-50	14 contacts →
	Indirect evidence “Reltech Limited founded in 1976 is an Independent Test Laboratory, Burn-In and HTOL system manufacturer serving the Semiconductor and Microelectronics industries.” Source: RevenueBase Database · checked Sep 28, 2026
12	Spherea UK	Indirect evidence	Christchurch, United KingdomHQ checked Sep 28, 2026	11-50	13 contacts →
	Indirect evidence “We are a Franco-British high-technology Test Solutions business with more than 70 years experience.” Source: RevenueBase Database · checked Sep 28, 2026
13	Rfcreations	Indirect evidence	Cambridge, United KingdomHQ checked Sep 28, 2026	1-10	12 contacts →
	Indirect evidence “RFcreations is a core team of highly skilled and knowledgeable, professional engineers with decades of experience across the design and development of both RF and digital…” Source: RevenueBase Database · checked Sep 28, 2026
14	CQE	Indirect evidence	Leeds, United KingdomHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence “A team of innovative Technology Leaders and Quality Engineers, we take a solution-led approach to help our clients engineer quality into all stages of their product lifecycle.” Source: RevenueBase Database · checked Sep 28, 2026
15	Teradyne Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	n/a	12 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
16	CYTAL	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “CyTAL exists to help developers, manufacturers and their customers to improve the security and resilience of products and systems.” Source: RevenueBase Database · checked Sep 28, 2026
17	The Peak Group	Partial evidence	Letchworth Garden City, United KingdomHQ checked Sep 28, 2026	51-200	11 contacts →
	Partial evidence “The Peak Group is a proven provider of automated test and measurement solutions supporting every stage of the assembly process from component testing to highly complex functional…” Source: RevenueBase Database · checked Sep 28, 2026
18	Devtank LTD	Partial evidence	Derby, United KingdomHQ checked Sep 28, 2026	1-10	8 contacts →
	Partial evidence “From the heart of the Industrial Revolution, Devtank is disrupting the industry with their award-winning production testing and smart monitoring solutions.” Source: RevenueBase Database · checked Sep 28, 2026
19	Jackmark	Indirect evidence	Stoke-on-trent, United KingdomHQ checked Sep 28, 2026	11-50	8 contacts →
	Indirect evidence “Jackmark is a UK-based specialist in the design, development and manufacture of reliable electrical functional test equipment, primarily serving the automotive industry while also…” Source: RevenueBase Database · checked Sep 28, 2026
20	Darvick LTD	Partial evidence	Brierley Hill, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “Darvick offers sub-contract testing services, we are a specialist team who work collaboratively with customers to specify, design and deliver non-standard, complex or extreme…” Source: RevenueBase Database · checked Sep 28, 2026
21	Absolute Validation LTD	Partial evidence	Farnborough, United KingdomHQ checked Sep 28, 2026	11-50	5 contacts →
	Partial evidence “At Absolute Validation, we offer a high-quality, experienced option for the live network and Field Testing needs of your wireless device.” Source: RevenueBase Database · checked Sep 28, 2026
22	Feabhas Limited	Indirect evidence	Swindon, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “Feabhas has been working with the world’s leading electronic companies such as Samsung, Arm, HP and Intel, since 1995.” Source: RevenueBase Database · checked Sep 28, 2026
23	Bermondsey Electronics LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “Bermondsey Electronics Limited is a highly experienced embedded system design house.” Source: RevenueBase Database · checked Sep 28, 2026
24	Proper QA	Partial evidence	Edinburgh, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “Founded in 2011 by industry veteran Nick Barrett, Proper QA is a quality assurance service provider, specialising in quality assurance testing and the creation of innovative test…” Source: RevenueBase Database · checked Sep 28, 2026
25	Thanehall Technical Services	Indirect evidence	Norwich, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Thanehall Technical Services designs, builds and integrates bespoke Automatic Test Equipment (ATE) for aerospace, defence and telecoms clients across Europe.” Source: RevenueBase Database · checked Sep 28, 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: embedded software 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 embedded software testing companies.
Partial evidence: Its own public description names part of embedded software testing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name embedded software 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 127 embedded software testing companies based in the United Kingdom

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Embedded software testing companies based in the United Kingdom at a glance

As of Sep 28, 2026

17.1%Verified-email coverage

26.9Average contacts per company

1-10Median size (employees)

20.5%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

5,001-10,000

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 127 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 embedded software 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 “embedded software 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 embedded software 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 embedded software 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, 585 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 28, 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.

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 embedded software 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 embedded software testing companies are there based in the United Kingdom?

RevenueBase identified 127 embedded software 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?

2i, headquartered in Edinburgh, tops this list with the largest team on record.

Which city has the most embedded software testing companies?

London leads with 26 headquartered companies, followed by Manchester (4) and Edinburgh (3).

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 585 verified decision-maker contacts tracked across these 127 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 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 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.