Company lists · Data refreshed September 2026

Top 25 Backend development companies based in the United Kingdom

Name: Backend development 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 19, 2026 121 companies tracked

RevenueBase identified 121 backend development companies headquartered in the United Kingdom as of September 2026 and tracks 1,228 professional contacts across them, including 90 with verified work emails. London is the largest hub.

This list covers backend development 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 19, 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 19, 2026 86% judged on-target in blind review

121Companies

1,228Contacts tracked

90Verified emails

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The 25 largest backend development companies based in the United Kingdom

Ranked by team size

Top 25 of 121 backend development companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to backend development 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	Unibrix	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	44 contacts →
	Partial evidence “Unibrix provides web and app development services for clients all over the world.” Source: RevenueBase Database · checked Sep 19, 2026
2	Softexpoit	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	18 contacts →
	Indirect evidence “Softexpoit's team of experts combines technical expertise and creativity to develop custom software, mobile app, and web app solutions that meet your specific business/official…” Source: RevenueBase Database · checked Sep 19, 2026
3	Atomate Software	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	16 contacts →
	Partial evidence “Founded in 2011, Atomate is a software development company focused on bespoke development and business solutions.” Source: RevenueBase Database · checked Sep 19, 2026
4	Vizrex Software Solutions	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	12 contacts →
	Indirect evidence “Vizrex Software Solutions builds custom software for startups, growing businesses, and complex operations.” Source: RevenueBase Database · checked Sep 19, 2026
5	Magna Software	Indirect evidence	Belfast, United KingdomHQ checked Sep 19, 2026	1-10	11 contacts →
	Indirect evidence “A collective of brilliant and dedicated minds providing next-generation digital services and consulting.” Source: RevenueBase Database · checked Sep 19, 2026
6	PNP Digital	Partial evidence	Sheffield, United KingdomHQ checked Sep 19, 2026	1-10	7 contacts →
	Partial evidence “PNP Digital are Sheffield based software engineers, app developers and business process experts specialising in the development, implementation, and support of bespoke software…” Source: RevenueBase Database · checked Sep 19, 2026
7	Miicon Solutions Limited	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	7 contacts →
	Indirect evidence “Miicon Solutions is a modern technology company delivering innovative, scalable, and high-performance digital solutions across web, mobile, and cloud platforms.” Source: RevenueBase Database · checked Sep 19, 2026
8	Tayfusion Digital	Indirect evidence	Dundee, United KingdomHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence “We are different.” Source: RevenueBase Database · checked Sep 19, 2026
9	Webstartiom.com LTD	Indirect evidence	Douglas, United KingdomHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence “At Webstartiom, we create custom software solutions to meet your unique business needs.” Source: RevenueBase Database · checked Sep 19, 2026
10	Transition Computing	Partial evidence	Milton Keynes, United KingdomHQ checked Sep 19, 2026	11-50	6 contacts →
	Partial evidence “Since 1998, Transition Computing’s bespoke software development specialists have enabled hundreds of small, medium and large businesses to boost productivity, drive down costs…” Source: RevenueBase Database · checked Sep 19, 2026
11	GB Logical UK LTD	Indirect evidence	Littlehampton, United KingdomHQ checked Sep 19, 2026	1-10	5 contacts →
	Indirect evidence “GB Logical is a technology company specialising in bespoke software solutions.” Source: RevenueBase Database · checked Sep 19, 2026
12	Full Metal	Indirect evidence	Northampton, United KingdomHQ checked Sep 19, 2026	11-50	4 contacts →
	Indirect evidence “Full Metal Software's mission is to make a difference to people and their businesses by providing all our customers with the best web applications and associated services to meet…” Source: RevenueBase Database · checked Sep 19, 2026
13	Thedevhouse	Partial evidence	Farnborough, United KingdomHQ checked Sep 19, 2026	11-50	4 contacts →
	Partial evidence “Development house in South East England, specialising in back office solutions, inventory management platforms and subscription tools.” Source: RevenueBase Database · checked Sep 19, 2026
14	Alphafirst LTD	Indirect evidence	Hoddesdon, United KingdomHQ checked Sep 19, 2026	1-10	3 contacts →
	Indirect evidence “Custom applications, innovative server solutions, managed IT support services, strategy and support agreements from a Herts based IT company.” Source: RevenueBase Database · checked Sep 19, 2026
15	Yorkshire Software	Indirect evidence	Bradford, United KingdomHQ checked Sep 19, 2026	1-10	3 contacts →
	Indirect evidence “Welcome to Yorkshire Software, Your Partner in Innovative Bespoke Software Solutions!” Source: RevenueBase Database · checked Sep 19, 2026
16	Snapwire Software	Partial evidence	Maidstone, United KingdomHQ checked Sep 19, 2026	1-10	3 contacts →
	Partial evidence “Snapwire provide software development services specialising in bespoke Web Applications, Mobile Apps and Automation Software.” Source: RevenueBase Database · checked Sep 19, 2026
17	X402 Limited	Indirect evidence	Hillington, United KingdomHQ checked Sep 19, 2026	1-10	3 contacts →
	Indirect evidence “X402 are a sofware developer who have vast experience in delivering leading edge web and client-server based software solutions.” Source: RevenueBase Database · checked Sep 19, 2026
18	Cloud Data Service	Partial evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 19, 2026	1-10	3 contacts →
	Partial evidence “Cloud Data Service Ltd is an award-winning software development company based in the heart of Newcastle upon Tyne.” Source: RevenueBase Database · checked Sep 19, 2026
19	Lucid Crystal LTD	Indirect evidence	Dartford, United KingdomHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “clear.” Source: RevenueBase Database · checked Sep 19, 2026
20	Initial Spark Consulting Limited	Indirect evidence	Leeds, United KingdomHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “Initial Spark™ is a modern software consultancy that is passionate about delivering technology solutions that effectively solve business problems.” Source: RevenueBase Database · checked Sep 19, 2026
21	Computerisation Limited	Indirect evidence	Cardiff, United KingdomHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “We are business application developers, helping businesses improve by developing innovative solutions with apps and database systems.” Source: RevenueBase Database · checked Sep 19, 2026
22	Pasilda	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	2 contacts →
	Partial evidence “Pasilda is a London based software and web development business with a focus on systems consulting.” Source: RevenueBase Database · checked Sep 19, 2026
23	KA Technology	Indirect evidence	Reading, United KingdomHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “We design and build bespoke applications for web, mobile and desktop.” Source: RevenueBase Database · checked Sep 19, 2026
24	Numa Productions LTD	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “Dynamic software consultancy specialising in custom built database-driven software applications.” Source: RevenueBase Database · checked Sep 19, 2026
25	Yellow Raincoat	Indirect evidence	Wimborne, United KingdomHQ checked Sep 19, 2026	1-10	1 contacts →
	Indirect evidence “Yellow Raincoat caters for all your PHP and Laravel needs.” Source: RevenueBase Database · checked Sep 19, 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: backend development 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 backend development companies.
Partial evidence: Its own public description names part of backend development companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name backend development 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 121 backend development companies based in the United Kingdom

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Backend development companies based in the United Kingdom at a glance

As of Sep 19, 2026

7.3%Verified-email coverage

10.1Average contacts per company

1-10Median size (employees)

25.6%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

1,001-5,000

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 121 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 backend development 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 “backend development 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 backend development 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 backend development 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, 90 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 19, 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.

Backend development companies by metro

Backend development companies in London31

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 backend development 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 backend development companies are there based in the United Kingdom?

RevenueBase identified 121 backend development 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?

Unibrix, headquartered in London, tops this list with the largest team on record.

Which city has the most backend development companies?

London leads with 31 headquartered companies, followed by Leeds (3) and Milton Keynes (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 90 verified decision-maker contacts tracked across these 121 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 19, 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.