Company lists · Data refreshed September 2026

Top 24 Custom software development firms based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 9, 2026 1,059 companies tracked

RevenueBase identified 1,059 company matches for custom software development firms associated with London, United Kingdom as of September 2026 and tracks 11,077 professional contacts across them, including 1,055 with verified work emails and 627 with mobile numbers. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for custom software development firms associated with London, United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 9, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 9, 2026 How this list was built

1,059Companies

11,077Contacts tracked

1,055Verified emails

627Mobile numbers

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The 24 largest custom software development firms based in London, United Kingdom

Ranked by team size

Top 24 of 1,059 company matches for custom software development firms based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 9, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Dotsquares	Exact match	London, United KingdomHQ recorded Sep 9, 2026	501-1,000	1,581 contacts →
	Exact match “We leverage the latest web and mobile technologies to build, grow and support your business.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
2	SENLA	Exact match	London, United KingdomHQ recorded Sep 9, 2026	501-1,000	515 contacts →
	Exact match “In 2012, SENLA set out with a vision: to transform people's lives with exceptional software.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
3	KRIFY	Exact match	London, United KingdomHQ recorded Sep 9, 2026	51-200	221 contacts →
	Exact match “Krify is a results-driven technology company specializing in crafting user-centric mobile apps, web applications, and software solutions.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
4	scrums.com	Exact match	London, United KingdomHQ recorded Sep 9, 2026	201-500	163 contacts →
	Exact match “Scrums.com is the Software Engineering Orchestration Platform (SEOP).” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
5	Digis, A Fiverr Company Nyse Fvrr	Exact match	London, United KingdomHQ recorded Sep 9, 2026	201-500	163 contacts →
	Exact match “Digis is a leading software development company with a team of over.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
6	Opinov8	Exact match	London, United KingdomHQ recorded Sep 9, 2026	201-500	154 contacts →
	Exact match “Winner of the Best AI Company Award by The Netty Awards · Headquartered in London, powered by a worldwide team of engineers across Europe, Egypt, and the Americas.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
7	Synycs Group	Exact match	London, United KingdomHQ recorded Sep 9, 2026	201-500	132 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
8	Timspark	Exact match	London, United KingdomHQ recorded Sep 9, 2026	51-200	73 contacts →
	Exact match “Timspark is a software development company/hub that creates custom software solutions to fit clients’ business needs.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
9	3i-Vision	Exact match	London, United KingdomHQ recorded Sep 9, 2026	51-200	60 contacts →
	Exact match “3i-Vision company was Founded in 2012, 3i-Vision is a provider of IT consulting services and custom software development with IT professionals.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
10	Gemba Advantage	Exact match	London, United KingdomHQ recorded Sep 9, 2026	51-200	59 contacts →
	Exact match “Gemba Advantage make high-impact software that is secure, scalable and sustainable.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
11	Aircury	Exact match	London, United KingdomHQ recorded Sep 9, 2026	11-50	55 contacts →
	Exact match “Aircury offers high quality software development for the education and non-profit sectors We specialise in- Full-stack application development for web and mobile- API and…” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
12	Satva Softech	Exact match	London, United KingdomHQ recorded Sep 9, 2026	51-200	53 contacts →
	Exact match “Established in 2015, SATVA Softech has carved a distinguished niche in the global technology landscape.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
13	Warrgyizmorsch	Exact match	London, United KingdomHQ recorded Sep 9, 2026	51-200	51 contacts →
	Exact match “Tailored ERP, CRM & SaaS that automates your operations and fuels measurable growth.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
14	Insight International UK LTD	Exact match	London, United KingdomHQ recorded Sep 9, 2026	51-200	50 contacts →
	Exact match “We provide Software Development, Maintenance and Other Related IT Services, across spectrum, depending on individual client’s needs and dependability on us.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
15	SKO Systems	Exact match	London, United KingdomHQ recorded Sep 9, 2026	51-200	45 contacts →
	Exact match “At SKO Systems, we engineer enterprise-grade software ecosystems designed for the unique, high-stakes realities of the maritime environment.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
16	Thinq24	Exact match	London, United KingdomHQ recorded Sep 9, 2026	11-50	42 contacts →
	Exact match “Software Development Company that encourages thinking beyond limits, turning our customers' ideas into reality.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
17	Limeup	Exact match	London, United KingdomHQ recorded Sep 9, 2026	11-50	42 contacts →
	Exact match “Limeup is an application & software development company.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
18	Taramsys	Exact match	London, United KingdomHQ recorded Sep 9, 2026	51-200	39 contacts →
	Exact match “Your premium software development partner for mobile, white label & enterprise applications.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
19	Mifort	Exact match	London, United KingdomHQ recorded Sep 9, 2026	51-200	39 contacts →
	Exact match “We are a software development outsourcing company with 9+ years in business and 200+ successful projects.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
20	The Tech Galore	Exact match	London, United KingdomHQ recorded Sep 9, 2026	11-50	37 contacts →
	Exact match “We are a leading global software development company that enables disruptive startups and enterprises to bridge the gap between Ideas and Reality through innovative web and…” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
21	Saqaya	Exact match	London, United KingdomHQ recorded Sep 9, 2026	51-200	36 contacts →
	Exact match “At SAQAYA, we grow businesses by engineering technology that customers love!” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
22	Avamae Software Solutions LTD	Exact match	London, United KingdomHQ recorded Sep 9, 2026	11-50	35 contacts →
	Exact match “AVAMAE is a London-based product development agency, building bespoke mobile, software and web applications since 2011.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
23	Kernelics	Exact match	London, United KingdomHQ recorded Sep 9, 2026	11-50	35 contacts →
	Exact match “Kernelics is a passionate team of web and mobile software developers, product managers, designers, and QA engineers.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase
24	A-Development	Exact match	London, United KingdomHQ recorded Sep 9, 2026	51-200	35 contacts →
	Exact match “A-development is a custom software development company that offers smart services for a wide range of businesses.” Recorded in the RevenueBase company graph · Sep 9, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “custom software development firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 24 of 1,059 custom software development firms based in London, United Kingdom

See the full list, filter by size, metro and specialty, and access 1,055 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Custom software development firms based in London, United Kingdom at a glance

As of Sep 9, 2026

9.5%Verified-email coverage

5.7%Mobile-number coverage

10.5Average contacts per company

1-10Median size (employees)

Sep 9, 2026Page data refreshed

Companies by employee count

1-10

577

11-50

378

51-200

201-500

501-1,000

5,001-10,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 12.0d

9570–30

8631–60

061–90

090–180

12180+

Company record updated

Median 73.0d

00–30

4,61331–60

4,81561–90

1,12090–180

529180+

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with London, United Kingdom whose business descriptions match “custom software development firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 1,055 professional contacts with verified work emails across the full matched dataset. 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 9, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Custom software development firms by metro in the United Kingdom

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “custom software development firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many custom software development firms are there based in London, United Kingdom?

RevenueBase identified 1,059 company matches for custom software development firms associated with London, United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Dotsquares tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United Kingdom has the most custom software development firms?

London leads the United Kingdom with 1,156 company records, followed by Manchester (107) and Birmingham (68).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,055 professional contacts with verified work emails tracked across these 1,059 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 9, 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 SmartSearch, 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.