Company lists · Data refreshed September 2026

Top 25 Government custom software development companies based in the United Kingdom

Name: Government custom software 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 27, 2026 201 companies tracked

RevenueBase identified 201 government custom software development companies headquartered in the United Kingdom as of September 2026 and tracks 4,687 professional contacts across them, including 1,927 with verified work emails. London is the largest hub.

This list covers government custom software 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 27, 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 27, 2026 86% judged on-target in blind review

201Companies

4,687Contacts tracked

1,927Verified emails

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The 25 largest government custom software development companies based in the United Kingdom

Ranked by team size

Top 25 of 201 government custom software development companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to government custom software 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	Civica	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	5,001-10,000	2,853 contacts →
	Partial evidence “We’re Civica and we make software that helps deliver critical services for citizens all around the world.” Source: RevenueBase Database · checked Sep 27, 2026
2	IDOX	Strong evidence	Woking, United KingdomHQ checked Sep 27, 2026	501-1,000	535 contacts →
	Strong evidence “Idox group's specialist software solutions power the performance of government and industry, driving productivity and a better experience for everyone.” Source: RevenueBase Database · checked Sep 27, 2026
3	Northgate Public Services	Partial evidence	Hemel Hempstead, United KingdomHQ checked Sep 27, 2026	1,001-5,000	321 contacts →
	Partial evidence “We're now NEC Software Solutions.” Source: RevenueBase Database · checked Sep 27, 2026
4	Gemba Advantage	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	59 contacts →
	Partial evidence “Gemba Advantage make high-impact software that is secure, scalable and sustainable.” Source: RevenueBase Database · checked Sep 27, 2026
5	QES	Partial evidence	Woodford, United KingdomHQ checked Sep 27, 2026	11-50	26 contacts →
	Partial evidence “Award winning software specialists providing a problem-solving approach to IT solutions.” Source: RevenueBase Database · checked Sep 27, 2026
6	Geniustags	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	24 contacts →
	Partial evidence “GeniusTags is a software solutions company that was founded by entrepreneurs with long experience in the IT and humanitarian sectors.” Source: RevenueBase Database · checked Sep 27, 2026
7	Hamiltonian Dynamics	Indirect evidence	Gloucestershire, United KingdomHQ checked Sep 27, 2026	11-50	23 contacts →
	Indirect evidence “At Hamiltonian Dynamics we have a secure by design engineering mindset built into the core of our company.” Source: RevenueBase Database · checked Sep 27, 2026
8	Vindico ICS LTD	Partial evidence	Llanelli, United KingdomHQ checked Sep 27, 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 27, 2026
9	Borwell	Strong evidence	Great Malvern, United KingdomHQ checked Sep 27, 2026	11-50	20 contacts →
	Strong evidence “From 2003 to 2023 the borwell team delivered software and IT solutions to the UK MoD and to UK Government departments, which were 'secure by design'.” Source: RevenueBase Database · checked Sep 27, 2026
10	Probase	Partial evidence	Camberley, United KingdomHQ checked Sep 27, 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 27, 2026
11	Styletech Solutions Limited	Partial evidence	Hessle, United KingdomHQ checked Sep 27, 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 27, 2026
12	Hubsolutions LTD	Strong evidence	Croydon, United KingdomHQ checked Sep 27, 2026	1-10	18 contacts →
	Strong evidence “HUBSolutions Ltd Software development for the public sector.” Source: RevenueBase Database · checked Sep 27, 2026
13	Softexpoit	Strong evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
14	Pecometer Software Limited	Partial evidence	Stockport, United KingdomHQ checked Sep 27, 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 27, 2026
15	MNP The Solution	Partial evidence	Salisbury, United KingdomHQ checked Sep 27, 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 27, 2026
16	Cirrus Software Solutions	Strong evidence	Bristol, United KingdomHQ checked Sep 27, 2026	11-50	12 contacts →
	Strong evidence “Cirrus Software Solutions provides the UK government with expertise in delivering high-quality secure software and systems engineering with a particular focus on transitioning to…” Source: RevenueBase Database · checked Sep 27, 2026
17	Zigtech	Strong evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	12 contacts →
	Strong evidence “We are an Innovative Software Development House with Emphasis on Fintech, InsureTech, EGov, Tailored Made, and Securetech Solution.” Source: RevenueBase Database · checked Sep 27, 2026
18	Ap16 Limited	Strong evidence	York, United KingdomHQ checked Sep 27, 2026	11-50	11 contacts →
	Strong evidence “ap16 provide clients with world-class quality software development and support services.” Source: RevenueBase Database · checked Sep 27, 2026
19	Bliss-Systems	Partial evidence	Wetherby, United KingdomHQ checked Sep 27, 2026	11-50	11 contacts →
	Partial evidence “Customised solutions \| Reliable infrastructures \| Secure information.” Source: RevenueBase Database · checked Sep 27, 2026
20	Igence Software LTD	Partial evidence	East Grinstead, United KingdomHQ checked Sep 27, 2026	11-50	11 contacts →
	Partial evidence “At Igence, our 20+ years experience with 500+ man years of cumulative software capabilities enables us to modernise systems, integrate software packages, enable visualisation of…” Source: RevenueBase Database · checked Sep 27, 2026
21	Innaxys LTD	Strong evidence	Heanor, United KingdomHQ checked Sep 27, 2026	11-50	10 contacts →
	Strong evidence “Innaxys Ltd is a software studio dedicated to the design, development and delivery of innovative cloud-based IT solutions in the public & private sectors.” Source: RevenueBase Database · checked Sep 27, 2026
22	Individual Systems LTD	Partial evidence	Redditch, United KingdomHQ checked Sep 27, 2026	1-10	10 contacts →
	Partial evidence “INDIVIDUAL SYSTEMS LTD provides bespoke development services to a range of industry's, we are based at Systems House, Moons Park, Burnt Meadow Road, Redditch.” Source: RevenueBase Database · checked Sep 27, 2026
23	First Option Software	Partial evidence	Alresford, United KingdomHQ checked Sep 27, 2026	11-50	9 contacts →
	Partial evidence “Our mission is to transform businesses with bespoke software.” Source: RevenueBase Database · checked Sep 27, 2026
24	Team Netsol LTD	Indirect evidence	Manchester, United KingdomHQ checked Sep 27, 2026	11-50	8 contacts →
	Indirect evidence “We solve complex challenges for our clients, using technology to help improve lives.” Source: RevenueBase Database · checked Sep 27, 2026
25	Derventio Solutions	Strong evidence	Derby, United KingdomHQ checked Sep 27, 2026	11-50	7 contacts →
	Strong evidence “Here at Derventio Solutions, we are proud to be one of the principal software development companies within the United Kingdom.” Source: RevenueBase Database · checked Sep 27, 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: government custom software 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 government custom software development companies.
Partial evidence: Its own public description names part of government custom software development companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name government custom software 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 201 government custom software development companies based in the United Kingdom

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Government custom software development companies based in the United Kingdom at a glance

As of Sep 27, 2026

41.1%Verified-email coverage

23.3Average contacts per company

1-10Median size (employees)

23.9%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

136

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 201 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 government custom software 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 “government custom software 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 government custom software 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 government custom software 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, 1,927 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 27, 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.

Government custom software development companies by metro

Government custom software development companies in London48

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 government custom software 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 government custom software development companies are there based in the United Kingdom?

RevenueBase identified 201 government custom software 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?

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

Which city has the most government custom software development companies?

London leads with 48 headquartered companies, followed by Manchester (7) and Nottingham (6).

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 1,927 verified decision-maker contacts tracked across these 201 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 27, 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.