Company lists · Data refreshed September 2026

Top 25 Software development quality firms based in the United Kingdom

Name: Software development quality firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 336 companies tracked

RevenueBase identified 336 software development quality firms headquartered in the United Kingdom as of September 2026 and tracks 5,000 professional contacts across them, including 931 with verified work emails. London is the largest hub.

This list covers software development quality firms 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 29, 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 29, 2026 86% judged on-target in blind review

336Companies

5,000Contacts tracked

931Verified emails

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The 25 largest software development quality firms based in the United Kingdom

Ranked by team size

Top 25 of 336 software development quality firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to software development quality firms: 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 29, 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 29, 2026
2	ROQ	Partial evidence	Chorley, United KingdomHQ checked Sep 29, 2026	51-200	109 contacts →
	Partial evidence “Roq is changing the way the world views Quality.” Source: RevenueBase Database · checked Sep 29, 2026
3	Webevis Technologies	Strong evidence	Bradford, United KingdomHQ checked Sep 29, 2026	51-200	83 contacts →
	Strong evidence “Webevis is a software development company specializing in delivering incomparable web and mobile application development services to diverse clients across the globe.” Source: RevenueBase Database · checked Sep 29, 2026
4	Tiqtoq LTD	Partial evidence	Newport, United KingdomHQ checked Sep 29, 2026	51-200	81 contacts →
	Partial evidence “tiQtoQ is an independent, innovation-led Quality Engineering partner delivering customised services and intelligent products across industries.” Source: RevenueBase Database · checked Sep 29, 2026
5	Clurgo	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	76 contacts →
	Strong evidence “Clurgo empowers global enterprises and early ventures to deliver software at higher velocity and better quality.” Source: RevenueBase Database · checked Sep 29, 2026
6	Qniverse	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	70 contacts →
	Partial evidence “Qniverse is your trusted Quality Assurance service partner that stands at the forefront of a paradigm shift in QA by redefining quality.” Source: RevenueBase Database · checked Sep 29, 2026
7	Zigzag QA	Partial evidence	Abingdon, United KingdomHQ checked Sep 29, 2026	11-50	47 contacts →
	Partial 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 29, 2026
8	Zoonou	Partial evidence	Eastbourne, United KingdomHQ checked Sep 29, 2026	11-50	45 contacts →
	Partial evidence “Zoonou is one of the UK’s leading software testing companies; we’re a Certified B Corporation® and 100% employee-owned.” Source: RevenueBase Database · checked Sep 29, 2026
9	Calibrecode Solutions LTD	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	39 contacts →
	Partial evidence “CalibreCode provides on-demand and integrated Quality Assurance Solutions for Product Management & Engineering teams.” Source: RevenueBase Database · checked Sep 29, 2026
10	Kudos Games Services	Strong evidence	Doncaster, United KingdomHQ checked Sep 29, 2026	51-200	37 contacts →
	Strong 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 29, 2026
11	IT Grids LTD	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	33 contacts →
	Indirect evidence “IT Grids is a global information technology (IT) services company offering span technology consulting, domain consulting, application services, systems integration, custom…” Source: RevenueBase Database · checked Sep 29, 2026
12	PRQA	Partial evidence	Walton On Thames, United KingdomHQ checked Sep 29, 2026	51-200	32 contacts →
	Partial evidence “Detect, enforce and measure Since 1985, PRQA has pioneered software coding governance in the automotive, aerospace, transport, finance, medical device and energy industries.” Source: RevenueBase Database · checked Sep 29, 2026
13	Phixos	Strong evidence	Worcester, United KingdomHQ checked Sep 29, 2026	11-50	29 contacts →
	Strong 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 29, 2026
14	Cloudberry360	Indirect evidence	Uxbridge, United KingdomHQ checked Sep 29, 2026	51-200	29 contacts →
	Indirect evidence “Cloudberry360 is a leader in digital transformation, strategically partnering with global organizations to adopt technology responsibly and drive innovation.” Source: RevenueBase Database · checked Sep 29, 2026
15	Cell Software Services LTD	Partial evidence	Brighton, United KingdomHQ checked Sep 29, 2026	11-50	28 contacts →
	Partial evidence “Cell Software is an expert provider of software solutions.” Source: RevenueBase Database · checked Sep 29, 2026
16	TGA Digital LTD	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	23 contacts →
	Strong evidence “TGA Digital is a software engineering consultancy focussed on delivering high quality software projects as well as consulting, due diligence, trouble shooting and fund raising.” Source: RevenueBase Database · checked Sep 29, 2026
17	Keytotech	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	22 contacts →
	Partial evidence “At KeyToTech, we turn ideas into scalable software products.” Source: RevenueBase Database · checked Sep 29, 2026
18	Experior	Indirect evidence	Staines, United KingdomHQ checked Sep 29, 2026	51-200	21 contacts →
	Indirect evidence “At Experior we believe the user experience is everything.” Source: RevenueBase Database · checked Sep 29, 2026
19	Digitalization Integrator	Strong evidence	Wokingham, United KingdomHQ checked Sep 29, 2026	51-200	18 contacts →
	Strong evidence “At Digitalization Integrator, our mission is to assist companies worldwide in enhancing their software development capabilities through our highly skilled team of professionals.” Source: RevenueBase Database · checked Sep 29, 2026
20	Evolve	Strong evidence	Ratby, United KingdomHQ checked Sep 29, 2026	51-200	15 contacts →
	Strong evidence “Evolve is an innovative UK-based software house that provides the full cycle of end-to-end software development services to startups and blue-chip companies globally.” Source: RevenueBase Database · checked Sep 29, 2026
21	Assured Thought By Izertis	Partial evidence	Shoreditch, United KingdomHQ checked Sep 29, 2026	51-200	15 contacts →
	Partial evidence “Our focus is your quality.” Source: RevenueBase Database · checked Sep 29, 2026
22	SMQA	Partial evidence	Canterbury, United KingdomHQ checked Sep 29, 2026	11-50	14 contacts →
	Partial evidence “SMQA is an established IT Consulting services company specialised in Quality Assurance, Performance Engineering and DevOps helping clients providing precise, scalable, quality…” Source: RevenueBase Database · checked Sep 29, 2026
23	Code4thought	Partial evidence	Holloway, United KingdomHQ checked Sep 29, 2026	11-50	13 contacts →
	Partial evidence “code4thought is a technology company with a unique purpose: to render technology transparent for large-scale software and AI-based systems.” Source: RevenueBase Database · checked Sep 29, 2026
24	Emenda	Partial evidence	Royal Wootton Bassett, United KingdomHQ checked Sep 29, 2026	11-50	13 contacts →
	Partial evidence “Since more than 15 years Emenda has provided the tools and expertise to help developers efficiently build software that’s more reliable and more secure.” Source: RevenueBase Database · checked Sep 29, 2026
25	CQE	Partial evidence	Leeds, United KingdomHQ checked Sep 29, 2026	11-50	12 contacts →
	Partial 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 29, 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: software development quality firms. 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 software development quality firms.
Partial evidence: Its own public description names part of software development quality firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name software development quality firms. 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 336 software development quality firms based in the United Kingdom

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Software development quality firms based in the United Kingdom at a glance

As of Sep 29, 2026

18.6%Verified-email coverage

14.9Average contacts per company

1-10Median size (employees)

43.2%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

239

11-50

51-200

201-500

501-1,000

1,001-5,000

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 336 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 software development quality firms, 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 “software development quality firms”. 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 software development quality firms), 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 software development quality firms, 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, 931 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 29, 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.

Software development quality firms by metro

Software development quality firms in London145

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 software development quality firms, 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 software development quality firms are there based in the United Kingdom?

RevenueBase identified 336 software development quality firms 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 software development quality firms?

London leads with 145 headquartered companies, followed by Manchester (15) and Birmingham (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 931 verified decision-maker contacts tracked across these 336 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 29, 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.