Company lists · Data refreshed September 2026

Top 25 Custom software development services based in the United Kingdom

Name: Custom software development services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 3,289 companies tracked

RevenueBase identified 3,289 custom software development services headquartered in the United Kingdom as of September 2026 and tracks 23,221 professional contacts across them, including 4,165 with verified work emails and 926 with mobile numbers. London is the largest hub.

This list covers custom software development services 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 24, 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 24, 2026 86% judged on-target in blind review

3,289Companies

23,221Contacts tracked

4,165Verified emails

926Mobile numbers

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The 25 largest custom software development services based in the United Kingdom

Ranked by team size

Top 25 of 3,289 custom software development services based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to custom software development services: 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	Dotsquares	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	1,581 contacts →
	Indirect evidence “We leverage the latest web and mobile technologies to build, grow and support your business.” Source: RevenueBase Database · checked Sep 24, 2026
2	Amdaris	Strong evidence	Bristol, United KingdomHQ checked Sep 24, 2026	501-1,000	988 contacts →
	Strong evidence “Amdaris, an Insight Company delivers innovative Software Development, Product Design, Digital Transformation, Application Support and Consultancy Services from our UK headquarters…” Source: RevenueBase Database · checked Sep 24, 2026
3	SENLA	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	515 contacts →
	Partial evidence “In 2012, SENLA set out with a vision: to transform people's lives with exceptional software.” Source: RevenueBase Database · checked Sep 24, 2026
4	Scott Logic	Partial evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 24, 2026	201-500	383 contacts →
	Partial evidence “At Scott Logic, we design and build software that transforms the performance of some of the world’s biggest and most demanding organisations.” Source: RevenueBase Database · checked Sep 24, 2026
5	Apadmi	Indirect evidence	Salford Quays, United KingdomHQ checked Sep 24, 2026	201-500	314 contacts →
	Indirect evidence “Apadmi is a leading specialist mobile consultancy.” Source: RevenueBase Database · checked Sep 24, 2026
6	KRIFY	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	221 contacts →
	Partial evidence “Krify is a results-driven technology company specializing in crafting user-centric mobile apps, web applications, and software solutions.” Source: RevenueBase Database · checked Sep 24, 2026
7	Leighton	Strong evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 24, 2026	51-200	201 contacts →
	Strong evidence “Leighton is a software development business that builds high performing teams and develops successful software applications for its customers.” Source: RevenueBase Database · checked Sep 24, 2026
8	ONE Beyond	Partial evidence	Farnborough, United KingdomHQ checked Sep 24, 2026	201-500	185 contacts →
	Partial evidence “We build software solutions, partnering with ambitious clients looking to grow by harnessing next-generation technology.” Source: RevenueBase Database · checked Sep 24, 2026
9	scrums.com	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	163 contacts →
	Partial evidence “Scrums.com is the Software Engineering Orchestration Platform (SEOP).” Source: RevenueBase Database · checked Sep 24, 2026
10	Digis, A Fiverr Company Nyse Fvrr	Strong evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	163 contacts →
	Strong evidence “Digis is a leading software development company with a team of over.” Source: RevenueBase Database · checked Sep 24, 2026
11	Opinov8	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	154 contacts →
	Indirect evidence “Winner of the Best AI Company Award by The Netty Awards · Headquartered in London, powered by a worldwide team of engineers across Europe, Egypt, and the Americas.” Source: RevenueBase Database · checked Sep 24, 2026
12	IIH Global	Indirect evidence	Rickmansworth, United KingdomHQ checked Sep 24, 2026	51-200	149 contacts →
	Indirect evidence “IIH Global is a global technology solutions company helping startups, SMEs, and enterprises in the UK, US, Europe, Australia, and Canada build the digital tools they need to run…” Source: RevenueBase Database · checked Sep 24, 2026
13	Digitally Inspired, Part Of Intellias	Partial evidence	Guildford, United KingdomHQ checked Sep 24, 2026	201-500	145 contacts →
	Partial evidence “Digitally Inspired(DI) Ltd is a fast-growing technology and software engineering Consultancy for business.” Source: RevenueBase Database · checked Sep 24, 2026
14	Intagleo Systems	Indirect evidence	Slough, United KingdomHQ checked Sep 24, 2026	51-200	138 contacts →
	Indirect evidence “For over 22 years, Intagleo has been a trusted partner for businesses worldwide and US Primes, empowering them to achieve their digital transformation goals through innovative…” Source: RevenueBase Database · checked Sep 24, 2026
15	Synycs Group	Strong evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	132 contacts →
	Strong evidence “Incorporated in 2014 and headquartered in the UK, Synycs Group is a CMMI Level 4 industry-leading & most reliable software and mobile app development company known for delivering…” Source: RevenueBase Database · checked Sep 24, 2026
16	Naimuri	Strong evidence	Salford, United KingdomHQ checked Sep 24, 2026	51-200	118 contacts →
	Strong evidence “We are Naimuri, a software development house, based in Manchester, specialising in data intelligence solutions.” Source: RevenueBase Database · checked Sep 24, 2026
17	Dorset Software	Strong evidence	Poole, United KingdomHQ checked Sep 24, 2026	51-200	111 contacts →
	Strong evidence “Operating since 1987, Dorset Software provides systems development capabilities to deliver industry leading technology.” Source: RevenueBase Database · checked Sep 24, 2026
18	PDMS	Strong evidence	Braddan, United KingdomHQ checked Sep 24, 2026	51-200	92 contacts →
	Strong evidence “PDMS is a technology company providing software development and digital transformation services.” Source: RevenueBase Database · checked Sep 24, 2026
19	BN Digital	Strong evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	87 contacts →
	Strong evidence “BN Digital is an enterprise software development agency specialising in custom web platform development, mobile app development, and AI/ML implementation We care deeply about…” Source: RevenueBase Database · checked Sep 24, 2026
20	Conovo Technologies	Strong evidence	Slough, United KingdomHQ checked Sep 24, 2026	51-200	84 contacts →
	Strong evidence “Conovo Technologies builds AI automation, agents and custom software for startups and SMEs.” Source: RevenueBase Database · checked Sep 24, 2026
21	Webevis Technologies	Strong evidence	Bradford, United KingdomHQ checked Sep 24, 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 24, 2026
22	Reading	Strong evidence	Reading, United KingdomHQ checked Sep 24, 2026	n/a	80 contacts →
	Strong evidence “Computer Software analysis, desing, and development.” Source: RevenueBase Database · checked Sep 24, 2026
23	BIT Wave Solutions Limited	Partial evidence	Reading, United KingdomHQ checked Sep 24, 2026	11-50	75 contacts →
	Partial evidence “Headquartered at Reading, Berkshire in United Kingdom, Bit Wave Solutions enables global businesses to build their future by directing clients’ innovation & customization agenda.” Source: RevenueBase Database · checked Sep 24, 2026
24	Timspark	Strong evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	73 contacts →
	Strong evidence “Timspark is a software development company/hub that creates custom software solutions to fit clients’ business needs.” Source: RevenueBase Database · checked Sep 24, 2026
25	TX Dynamics	Strong evidence	Birmingham, United KingdomHQ checked Sep 24, 2026	51-200	72 contacts →
	Strong evidence “TX Dynamics is a software development company, that helps businesses with product design, web and application development, and technology acceleration.” Source: RevenueBase Database · checked Sep 24, 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: custom software development services. 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 custom software development services.
Partial evidence: Its own public description names part of custom software development services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom software development services. 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 3,289 custom software development services based in the United Kingdom

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Custom software development services based in the United Kingdom at a glance

As of Sep 24, 2026

17.9%Verified-email coverage

4.0%Mobile-number coverage

7.1Average contacts per company

1-10Median size (employees)

43.6%Largest-city concentration · London

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

2,554

11-50

1,152

51-200

233

201-500

501-1,000

1,001-5,000

5,001-10,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 26.0d

3,1140–30

95631–60

4661–90

890–180

41180+

Company record updated

Median 89.0d

00–30

2,12031–60

10,72061–90

9,05890–180

1,323180+

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 custom software development services, 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 “custom software development services”. 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 custom software development services), 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 custom software development services, 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, 4,165 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 24, 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.

Custom software development services by metro

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 custom software development services, 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 custom software development services are there based in the United Kingdom?

RevenueBase identified 3,289 custom software development services 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?

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

Which city has the most custom software development services?

London leads with 1435 headquartered companies, followed by Manchester (118) and Birmingham (79).

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 4,165 verified decision-maker contacts tracked across these 3,289 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 24, 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.