Company lists · Data refreshed September 2026

Top 25 Volunteer software development companies based in the United Kingdom

Name: Volunteer 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 29, 2026 884 companies tracked

RevenueBase identified 884 volunteer software development companies headquartered in the United Kingdom as of September 2026 and tracks 8,080 professional contacts across them, including 1,065 with verified work emails. London is the largest hub.

This list covers volunteer 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 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

884Companies

8,080Contacts tracked

1,065Verified emails

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The 25 largest volunteer software development companies based in the United Kingdom

Ranked by team size

Top 25 of 884 volunteer software development companies 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 volunteer 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	Dotsquares	Indirect evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
2	Magora	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	213 contacts →
	Strong evidence “Magora is an international software development company with 12 years of extensive experience in bespoke development outsourcing market.” Source: RevenueBase Database · checked Sep 29, 2026
3	ONE Beyond	Partial evidence	Farnborough, United KingdomHQ checked Sep 29, 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 29, 2026
4	RSK Business Solutions	Partial evidence	Hildenborough, United KingdomHQ checked Sep 29, 2026	51-200	137 contacts →
	Partial evidence “When it comes to software consultancy and resourcing companies, we’re proud to be very versatile.” Source: RevenueBase Database · checked Sep 29, 2026
5	Xynotech	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	96 contacts →
	Strong evidence “Xynotech is a provider of IT consulting and software development services that help companies overtake their competition.” Source: RevenueBase Database · checked Sep 29, 2026
6	Timspark	Strong evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
7	On The Spot Development	Indirect evidence	Harrogate, United KingdomHQ checked Sep 29, 2026	51-200	72 contacts →
	Indirect evidence “At On The Spot, we help tech companies hire engineers and build offshore R&D teams in Poland and Georgia./ 30+ R&D teams built / 400+ roles filled / 8 M & As across customer…” Source: RevenueBase Database · checked Sep 29, 2026
8	Podtech	Strong evidence	Milton Keynes, United KingdomHQ checked Sep 29, 2026	51-200	69 contacts →
	Strong evidence “PODTECH is a software development company with a comprehensive suite of services.” Source: RevenueBase Database · checked Sep 29, 2026
9	Agile Cyber Solutions	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	69 contacts →
	Strong evidence “Agile Cyber Solutions is a company providing software services which prides itself as an understanding IT partner for various product development companies, large portals…” Source: RevenueBase Database · checked Sep 29, 2026
10	Blueberry Consultants LTD	Strong evidence	Birmingham, United KingdomHQ checked Sep 29, 2026	51-200	65 contacts →
	Strong 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 29, 2026
11	Venture DK	Strong evidence	Leeds, United KingdomHQ checked Sep 29, 2026	51-200	47 contacts →
	Strong evidence “VentureDK is a fast-growing software development company with 15 years of experience.” Source: RevenueBase Database · checked Sep 29, 2026
12	Avco Systems	Strong evidence	Slough, United KingdomHQ checked Sep 29, 2026	51-200	46 contacts →
	Strong evidence “Formed in 1986, Avco Systems Ltd has over 40 years of experience in the Software Development sector and provides a range of quality products and services to clients throughout the…” Source: RevenueBase Database · checked Sep 29, 2026
13	Mifort	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	39 contacts →
	Strong evidence “We are a software development outsourcing company with 9+ years in business and 200+ successful projects.” Source: RevenueBase Database · checked Sep 29, 2026
14	Sapnagroup LTD	Indirect evidence	Reigate, United KingdomHQ checked Sep 29, 2026	51-200	36 contacts →
	Indirect evidence “We follow a simple philosophy: do the basics right, consistently, and the rest will follow.” Source: RevenueBase Database · checked Sep 29, 2026
15	Kernelics	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	35 contacts →
	Partial evidence “Kernelics is a passionate team of web and mobile software developers, product managers, designers, and QA engineers.” Source: RevenueBase Database · checked Sep 29, 2026
16	Terabit IT	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	35 contacts →
	Strong evidence “TeraBit IT is a custom software development firm, serving clients all over the world.” Source: RevenueBase Database · checked Sep 29, 2026
17	auxilium.digital	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	35 contacts →
	Partial evidence “Auxilium Digital helps businesses with limited resources, higher operational costs achieve utmost customer satisfaction through providing customized offshore development teams…” Source: RevenueBase Database · checked Sep 29, 2026
18	Avidi Technologies	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	33 contacts →
	Indirect evidence “Avidi Technologies is an Innovative English - Ukrainian IT company with headquarters in London, UK, and R&D centers in Ivano-Frankivsk, Kharkiv, and Ternopil, Ukraine; with…” Source: RevenueBase Database · checked Sep 29, 2026
19	The Nine Software Company	Strong evidence	Newcastle, United KingdomHQ checked Sep 29, 2026	11-50	31 contacts →
	Strong evidence “Nine is a highly acclaimed, award winning, privately owned and entirely independent Software Development Company, delivering consultancy, software strategy and build solutions.” Source: RevenueBase Database · checked Sep 29, 2026
20	Software Planet Group	Partial evidence	Guildford, United KingdomHQ checked Sep 29, 2026	51-200	29 contacts →
	Partial evidence “Software Planet Group (SPG) is a UK-based custom software company out of Guildford.” Source: RevenueBase Database · checked Sep 29, 2026
21	ARK IT Services	Partial evidence	Birmingham, United KingdomHQ checked Sep 29, 2026	11-50	29 contacts →
	Partial evidence “At ARK IT Services, we focus on building practical software solutions that solve real business problems.” Source: RevenueBase Database · checked Sep 29, 2026
22	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
23	Incode Systems Web, Mobile & AI Product Development	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	28 contacts →
	Strong evidence “We are a software development company that designs, develops, and deploys software solutions for organizations across industries.” Source: RevenueBase Database · checked Sep 29, 2026
24	TGA Digital LTD	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	23 contacts →
	Partial 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
25	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

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: volunteer 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 volunteer software development companies.
Partial evidence: Its own public description names part of volunteer 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 volunteer 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 884 volunteer software development companies based in the United Kingdom

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Volunteer software development companies based in the United Kingdom at a glance

As of Sep 29, 2026

13.2%Verified-email coverage

9.1Average contacts per company

1-10Median size (employees)

37.2%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

606

11-50

211

51-200

201-500

501-1,000

10001+

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 884 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 volunteer 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 “volunteer 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 volunteer 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 volunteer 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, 1,065 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.

Volunteer software development companies 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 volunteer 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 volunteer software development companies are there based in the United Kingdom?

RevenueBase identified 884 volunteer 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?

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

Which city has the most volunteer software development companies?

London leads with 329 headquartered companies, followed by Manchester (27) and Birmingham (16).

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 1,065 verified decision-maker contacts tracked across these 884 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.