Company lists · Data refreshed September 2026

Top 25 Custom web software agencies based in the United Kingdom

Name: Custom web software agencies 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 4,229 companies tracked

RevenueBase identified 4,229 custom web software agencies headquartered in the United Kingdom as of September 2026 and tracks 22,958 professional contacts across them, including 4,092 with verified work emails and 1,106 with mobile numbers. London is the largest hub.

This list covers custom web software agencies 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

4,229Companies

22,958Contacts tracked

4,092Verified emails

1,106Mobile numbers

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The 25 largest custom web software agencies based in the United Kingdom

Ranked by team size

Top 25 of 4,229 custom web software agencies 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 web software agencies: 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	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	1,581 contacts →
	Partial evidence “We leverage the latest web and mobile technologies to build, grow and support your business.” Source: RevenueBase Database · checked Sep 24, 2026
2	KRIFY	Strong evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	221 contacts →
	Strong 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
3	Synycs Group	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	132 contacts →
	Partial 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
4	CIVIC	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 24, 2026	11-50	96 contacts →
	Indirect evidence “We use creative thinking, digital innovation and collaborative problem-solving (and 20 years of know-how) to help our clients communicate better with their audiences and achieve…” Source: RevenueBase Database · checked Sep 24, 2026
5	PDMS	Partial evidence	Braddan, United KingdomHQ checked Sep 24, 2026	51-200	92 contacts →
	Partial evidence “PDMS is a technology company providing software development and digital transformation services.” Source: RevenueBase Database · checked Sep 24, 2026
6	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
7	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
8	KITE	Indirect evidence	Oxford, United KingdomHQ checked Sep 24, 2026	n/a	75 contacts →
	Indirect evidence “Kite is an internet development consultancy.” Source: RevenueBase Database · checked Sep 24, 2026
9	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
10	Versatile Commerce	Partial evidence	Milton Keynes, United KingdomHQ checked Sep 24, 2026	51-200	64 contacts →
	Partial evidence “Versatile Commerce is an innovative bespoke software development company headquartered in the UK, with offices in the US and India.” Source: RevenueBase Database · checked Sep 24, 2026
11	Ghyston	Partial evidence	Bristol, United KingdomHQ checked Sep 24, 2026	51-200	61 contacts →
	Partial evidence “Ghyston is an award-winning UK software company based in Bristol.” Source: RevenueBase Database · checked Sep 24, 2026
12	Appenza	Partial evidence	Dartford, United KingdomHQ checked Sep 24, 2026	11-50	61 contacts →
	Partial evidence “We aim at improvising our client businesses by developing innovative mobile & web applications and solutions that boost productivity, reduces operational costs, increases ROI and…” Source: RevenueBase Database · checked Sep 24, 2026
13	3i-Vision	Strong evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	60 contacts →
	Strong evidence “3i-Vision company was Founded in 2012, 3i-Vision is a provider of IT consulting services and custom software development with IT professionals.” Source: RevenueBase Database · checked Sep 24, 2026
14	Arramton Infotech LTD	Partial evidence	Teddington London, United KingdomHQ checked Sep 24, 2026	51-200	56 contacts →
	Partial evidence “Arramton Infotech is a UK-registered software and app development company trusted by startups and established businesses across the United Kingdom and United States.” Source: RevenueBase Database · checked Sep 24, 2026
15	Madebyshape	Partial evidence	Atherton, United KingdomHQ checked Sep 24, 2026	11-50	55 contacts →
	Partial evidence “We are a Web Design Agency based in Manchester, UK specialising in Craft CMS.” Source: RevenueBase Database · checked Sep 24, 2026
16	Impressit	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	54 contacts →
	Partial evidence “A premium digital agency with an in-house team of tech experts, who build SaaS products, mobile and web applications for SMEs by using clean processes and the latest technologies…” Source: RevenueBase Database · checked Sep 24, 2026
17	Satva Softech	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	53 contacts →
	Indirect evidence “Established in 2015, SATVA Softech has carved a distinguished niche in the global technology landscape.” Source: RevenueBase Database · checked Sep 24, 2026
18	Warrgyizmorsch	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	51 contacts →
	Indirect evidence “Tailored ERP, CRM & SaaS that automates your operations and fuels measurable growth.” Source: RevenueBase Database · checked Sep 24, 2026
19	Vasave Business Solutions	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	11-50	48 contacts →
	Partial evidence “We are specialized in the development of innovative IT solutions and complex software projects to B2B and B2C.” Source: RevenueBase Database · checked Sep 24, 2026
20	Design Direct UK	Indirect evidence	Enfield, United KingdomHQ checked Sep 24, 2026	11-50	47 contacts →
	Indirect evidence “Bespoke Website, Mobile App, AI & ML Development Company based in London since 2006.” Source: RevenueBase Database · checked Sep 24, 2026
21	Staxo Group	Partial evidence	Richmond, United KingdomHQ checked Sep 24, 2026	51-200	45 contacts →
	Partial evidence “Staxo Group is a Web Design and Development consulting company based out of Oriel House, 26 The Quadrant, Richmond, United Kingdom.” Source: RevenueBase Database · checked Sep 24, 2026
22	Neworbit LTD	Strong evidence	Chalgrove, United KingdomHQ checked Sep 24, 2026	11-50	44 contacts →
	Strong evidence “At NewOrbit, we don’t just develop software-we craft tailored, web-based business solutions that empower companies to innovate, grow, and stay ahead of the curve.” Source: RevenueBase Database · checked Sep 24, 2026
23	KD WEB	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	11-50	44 contacts →
	Partial evidence “KD Web is an award winning internet marketing, web design and creative agency, providing SEO, polished website design, Ecommerce and CMS systems as well as branding and graphic…” Source: RevenueBase Database · checked Sep 24, 2026
24	Enigma Interactive	Indirect evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 24, 2026	11-50	43 contacts →
	Indirect evidence “Enigma Interactive is an award-winning specialist digital development agency.” Source: RevenueBase Database · checked Sep 24, 2026
25	Adopstar LTD	Partial evidence	Cullompton, United KingdomHQ checked Sep 24, 2026	11-50	38 contacts →
	Partial evidence “provides complete Advertising, Marketing and Web Development Solutions for all Businesses, from startups to multinationals.” 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 web software agencies. 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 web software agencies.
Partial evidence: Its own public description names part of custom web software agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom web software agencies. 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 4,229 custom web software agencies based in the United Kingdom

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Custom web software agencies based in the United Kingdom at a glance

As of Sep 24, 2026

17.8%Verified-email coverage

4.8%Mobile-number coverage

5.4Average contacts per company

1-10Median size (employees)

31.2%Largest-city concentration · London

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

3,035

11-50

985

51-200

147

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 27.0d

3,0090–30

98831–60

5961–90

690–180

30180+

Company record updated

Median 90.0d

00–30

1,98631–60

10,19961–90

9,49690–180

1,277180+

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 web software agencies, 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 web software agencies”. 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 web software agencies), 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 web software agencies, 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, 4,092 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 web software agencies 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 web software agencies, 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 web software agencies are there based in the United Kingdom?

RevenueBase identified 4,229 custom web software agencies 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 web software agencies?

London leads with 1319 headquartered companies, followed by Manchester (138) and Birmingham (83).

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 4,092 verified decision-maker contacts tracked across these 4,229 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.