Company lists · Data verified August 2026

Top 25 Custom software development agencies based in the United Kingdom

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 3,833 companies tracked

There are 3,833 custom software development agencies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 30,850 professional contacts across them, including 6,942 with verified work emails and 1,200 with mobile numbers. London is the largest hub.

This list covers custom software development 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. Data current as of August 28, 2026.

3,833Companies

30,850Contacts tracked

6,942Verified emails

1,200Mobile numbers

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

Ranked by team size

Top 25 of 3,833 custom software development agencies based in the United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Hyperlink Infosystem	London	1,001-5,000	1,240	131
2	BBD	London	1,001-5,000	1,220	485
3	Webskitters Technology Solutions Private Limited	London	501-1,000	801	174
4	Softteco	Loughborough	501-1,000	539	247
5	Scott Logic	Bristol	201-500	392	260
6	Biztech Consulting & Solutions	Ruislip Ruislip	201-500	317	10
7	Mallow Technologies Private Limited	London	51-200	315	129
8	Q Agency	London	201-500	263	166
9	Fiftyfive Technologies	London	201-500	247	29
10	Netweb Software	Swindon	201-500	237	165
11	Mobcoder	Surrey	201-500	233	77
12	Dreamztech Solutions	Watford	201-500	227	68
13	Emizen Tech	London	201-500	207	19
14	Sphinx Solutions Pvt. LTD	London	201-500	205	51
15	Devico Solutions	London	201-500	118	33
16	Dorset Software	Poole	51-200	111	59
17	DTC Infotech Pvt. LTD	London	201-500	104	16
18	Saratoga Software	Worcester	51-200	91	52
19	PDMS	Braddan	51-200	91	34
20	Indglobal Digital Private Limited	Uk	51-200	69	2
21	Ghyston	West Bristol	51-200	61	38
22	Gemba Advantage	London	51-200	60	46
23	3i-Vision	London	51-200	59	22
24	Deveire	Londonderry	51-200	56	32
25	Cmolds	Pendlebury Manchester	501-1,000	55	12

Showing 25 of 3,833 custom software development agencies based in the United Kingdom

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

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 1388 HQs

1,200Contacts with mobile numbers

14Emails re-verified in last 30 days

Companies by employee count

1-10

2,387

11-50

1,086

51-200

248

201-500

501-1,000

1,001-5,000

5,001-10,000

Custom software development agencies by metro

Metro	Companies
Custom software development agencies in London	1388
Custom software development agencies in Manchester	128
Custom software development agencies in Birmingham	81
Custom software development agencies in Bristol	49
Custom software development agencies in Leeds	49
Custom software development agencies in Edinburgh	42
Custom software development agencies in Glasgow	41

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “custom software development agencies”, with match quality audited by blind human judging, and headquartered in the United Kingdom.
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: Contact records re-verify on a rolling cadence; 14 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many custom software development agencies are there based in the United Kingdom?

There are 3,833 custom software development agencies headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most custom software development agencies?

London leads with 1388 headquartered companies, followed by Manchester (128) and Birmingham (81).

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 6,942 verified decision-maker contacts tracked across these 3,833 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.