Company lists · Data refreshed September 2026

Top 25 Custom windows software companies based in the United Kingdom

Name: Custom windows software 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 318 companies tracked

RevenueBase identified 318 custom windows software companies headquartered in the United Kingdom as of September 2026 and tracks 1,280 professional contacts across them, including 360 with verified work emails. London is the largest hub.

This list covers custom windows software 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

318Companies

1,280Contacts tracked

360Verified emails

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The 25 largest custom windows software companies based in the United Kingdom

Ranked by team size

Top 25 of 318 custom windows software 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 custom windows software 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	Blueberry Consultants LTD	Partial evidence	Birmingham, United KingdomHQ checked Sep 28, 2026	51-200	65 contacts →
	Partial evidence “Blueberry Consultants is a private limited software development company, formed in 1997 by the current Managing Director, Martin Green.” Source: RevenueBase Database · checked Sep 28, 2026
2	Propel Tech	Indirect evidence	Wakefield, United KingdomHQ checked Sep 28, 2026	51-200	36 contacts →
	Indirect evidence “As experts across new and legacy technologies we make possibilities happen to move business forward.” Source: RevenueBase Database · checked Sep 28, 2026
3	Convosoft	Partial evidence	Manchester, United KingdomHQ checked Sep 28, 2026	11-50	35 contacts →
	Partial evidence “Our Software Development Company is a leading provider of innovative and reliable software solutions.” Source: RevenueBase Database · checked Sep 28, 2026
4	Ecologital	Indirect evidence	Harrow, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Indirect evidence “Ecologital is a specialist organisation in Information Technology (IT) with a unique product and service offering.” Source: RevenueBase Database · checked Sep 28, 2026
5	WPC Software	Strong evidence	Bristol, United KingdomHQ checked Sep 28, 2026	11-50	29 contacts →
	Strong evidence “WPC Software Limited is an established provider of information technology solutions, designing and developing complex Microsoft Windows and Web based applications, as well as…” Source: RevenueBase Database · checked Sep 28, 2026
6	Brilino Solutions Private Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	24 contacts →
	Partial evidence “BRILINO SOLUTIONS is a high end business application development company providing bespoke business solutions for enterprise customers.” Source: RevenueBase Database · checked Sep 28, 2026
7	Decent Group	Partial evidence	Swindon, United KingdomHQ checked Sep 28, 2026	11-50	23 contacts →
	Partial evidence “We create precisely the software you need to achieve your goals.” Source: RevenueBase Database · checked Sep 28, 2026
8	Vindico ICS LTD	Partial evidence	Llanelli, United KingdomHQ checked Sep 28, 2026	11-50	21 contacts →
	Partial evidence “Vindico is a tech and innovation company committed to creating software that drives simpler, better business.” Source: RevenueBase Database · checked Sep 28, 2026
9	Probase	Partial evidence	Camberley, United KingdomHQ checked Sep 28, 2026	11-50	20 contacts →
	Partial evidence “Probase develop bespoke software solutions using the latest technologies to give your business greater control and confidence in your business processes.” Source: RevenueBase Database · checked Sep 28, 2026
10	Styletech Solutions Limited	Partial evidence	Hessle, United KingdomHQ checked Sep 28, 2026	11-50	19 contacts →
	Partial evidence “At StyleTech, we specialise in bespoke software that’s built around your business.” Source: RevenueBase Database · checked Sep 28, 2026
11	Softexpoit	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Strong 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 28, 2026
12	Pecometer Software Limited	Partial evidence	Stockport, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial evidence “At Pecometer, our mission has always been the same: building bespoke software tailored to businesses that are tired of shaping their operations around systems that only partially…” Source: RevenueBase Database · checked Sep 28, 2026
13	Koderly	Partial evidence	Manchester, United KingdomHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “Koderly is a Manchester-based market-leading technology solutions provider, offering bespoke software development and IT services.” Source: RevenueBase Database · checked Sep 28, 2026
14	Intellicore LTD	Partial evidence	Aberdeen, United KingdomHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “Aberdeen’s Intellicore is a specialist bespoke software development business that provides solutions to the practical issues faced by our clients in the daily running of their…” Source: RevenueBase Database · checked Sep 28, 2026
15	MNP The Solution	Partial evidence	Salisbury, United KingdomHQ checked Sep 28, 2026	11-50	13 contacts →
	Partial evidence “After 20 years we continue to design our software in response to the ever demanding environment that we work in.” Source: RevenueBase Database · checked Sep 28, 2026
16	Blueberry Systems Limited	Partial evidence	Gloucester, United KingdomHQ checked Sep 28, 2026	51-200	12 contacts →
	Partial evidence “Blueberry Systems is a UK-based bespoke software development company delivering intelligent, scalable, and business-focused technology solutions for organisations across diverse…” Source: RevenueBase Database · checked Sep 28, 2026
17	Atlas Computer Systems	Strong evidence	Southend-on-sea, United KingdomHQ checked Sep 28, 2026	11-50	12 contacts →
	Strong evidence “Atlas is a software development company specialising in the creation of bespoke software applications for Microsoft Windows and the web.” Source: RevenueBase Database · checked Sep 28, 2026
18	Intradev Limited	Partial evidence	Hessle, United KingdomHQ checked Sep 28, 2026	11-50	10 contacts →
	Partial evidence “Software Developers who work all over the UK.” Source: RevenueBase Database · checked Sep 28, 2026
19	First Option Software	Partial evidence	Alresford, United KingdomHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “Our mission is to transform businesses with bespoke software.” Source: RevenueBase Database · checked Sep 28, 2026
20	Atreon	Strong evidence	Kings Hill, United KingdomHQ checked Sep 28, 2026	11-50	8 contacts →
	Strong evidence “Atreon is a trusted UK-based software development company empowering businesses with custom software solutions.” Source: RevenueBase Database · checked Sep 28, 2026
21	Agilitas LTD	Partial evidence	Castletown, United KingdomHQ checked Sep 28, 2026	1-10	8 contacts →
	Partial evidence “Agilitas is a bespoke software development company founded by developers with many years of experience within the finance sector.” Source: RevenueBase Database · checked Sep 28, 2026
22	PNP Digital	Partial evidence	Sheffield, United KingdomHQ checked Sep 28, 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 28, 2026
23	Special Work And Technology	Strong evidence	Guildford, United KingdomHQ checked Sep 28, 2026	11-50	7 contacts →
	Strong evidence “Special Work and Technology Ltd (SWAT) was established in 2003 delivering high quality custom software solutions and services to large multi nationals utilising high calibre…” Source: RevenueBase Database · checked Sep 28, 2026
24	EJ Software	Partial evidence	Cambridge, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “Specialists in bespoke software creation to improve businesses.” Source: RevenueBase Database · checked Sep 28, 2026
25	Techlondo	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “Techlondo is an innovative software company that excels in developing cutting-edge technology solutions.” 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: custom windows software 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 custom windows software companies.
Partial evidence: Its own public description names part of custom windows software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom windows software 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 318 custom windows software companies based in the United Kingdom

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Custom windows software companies based in the United Kingdom at a glance

As of Sep 28, 2026

28.1%Verified-email coverage

4.0Average contacts per company

1-10Median size (employees)

22.3%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

236

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 318 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 custom windows software 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 “custom windows software 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 custom windows software 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 custom windows software 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, 360 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.

Custom windows software companies by metro

Custom windows software companies in London71

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 windows software 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 custom windows software companies are there based in the United Kingdom?

RevenueBase identified 318 custom windows software 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?

Blueberry Consultants LTD, headquartered in Birmingham, tops this list with the largest team on record.

Which city has the most custom windows software companies?

London leads with 71 headquartered companies, followed by Manchester (14) and Birmingham (9).

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 360 verified decision-maker contacts tracked across these 318 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.