Company lists · Data refreshed September 2026

Top 25 Custom software consultancies based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 739 companies tracked

RevenueBase identified 739 custom software consultancies headquartered in London, United Kingdom as of September 2026 and tracks 15,621 professional contacts across them, including 7,259 with verified work emails. London is the largest hub.

This list covers custom software consultancies headquartered in London, 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

739Companies

15,621Contacts tracked

7,259Verified emails

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The 25 largest custom software consultancies based in London, United Kingdom

Ranked by team size

Top 25 of 739 custom software consultancies based in London, 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 software consultancies: 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	Endava	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	10001+	9,653 contacts →
	Indirect evidence “For over two decades, we have been harnessing technology to drive meaningful change.” Source: RevenueBase Database · checked Sep 24, 2026
2	SENLA	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	515 contacts →
	Partial evidence “In 2012, SENLA set out with a vision: to transform people's lives with exceptional software.” Source: RevenueBase Database · checked Sep 24, 2026
3	Dreams Technologies, UK & India	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	221 contacts →
	Partial evidence “At Dreams Technologies, we’re more than software engineers, we’re digital transformation partners.” Source: RevenueBase Database · checked Sep 24, 2026
4	Digis, A Fiverr Company Nyse Fvrr	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	163 contacts →
	Partial evidence “Digis is a leading software development company with a team of over.” Source: RevenueBase Database · checked Sep 24, 2026
5	Opinov8	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	154 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 24, 2026
6	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
7	Xynotech	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	96 contacts →
	Partial evidence “Xynotech is a provider of IT consulting and software development services that help companies overtake their competition.” Source: RevenueBase Database · checked Sep 24, 2026
8	JUXT	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	87 contacts →
	Partial evidence “JUXT joins forces with Grid Dynamics, JUXT is a cutting-edge software consultancy that delivers innovation to large enterprises and high-performing organisations.” Source: RevenueBase Database · checked Sep 24, 2026
9	Clurgo	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	76 contacts →
	Partial evidence “Clurgo empowers global enterprises and early ventures to deliver software at higher velocity and better quality.” Source: RevenueBase Database · checked Sep 24, 2026
10	Softhouse Group	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	73 contacts →
	Partial evidence “SoftHouse & SoftHouse Advisory is a leading provider of innovative software solutions, empowering businesses to thrive in the digital era.” Source: RevenueBase Database · checked Sep 24, 2026
11	Timspark	Strong evidence	London, United KingdomHQ checked Sep 24, 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 24, 2026
12	Axtrum Technologies	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	68 contacts →
	Indirect evidence “We don’t only deliver a change – We deliver a change that adds value and delivers business benefit that is real, tangible and measurable!” Source: RevenueBase Database · checked Sep 24, 2026
13	Natobotics	Strong evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	63 contacts →
	Strong evidence “Natobotics Ltd founded in 2012, provides boutique technology, digital customer experience, consulting and software development services.” Source: RevenueBase Database · checked Sep 24, 2026
14	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
15	Gemba Advantage	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	59 contacts →
	Partial evidence “Gemba Advantage make high-impact software that is secure, scalable and sustainable.” Source: RevenueBase Database · checked Sep 24, 2026
16	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
17	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
18	Insight International UK LTD	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	50 contacts →
	Partial evidence “We provide Software Development, Maintenance and Other Related IT Services, across spectrum, depending on individual client’s needs and dependability on us.” Source: RevenueBase Database · checked Sep 24, 2026
19	SKO Systems	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	45 contacts →
	Partial evidence “At SKO Systems, we engineer enterprise-grade software ecosystems designed for the unique, high-stakes realities of the maritime environment.” Source: RevenueBase Database · checked Sep 24, 2026
20	Saqaya	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	36 contacts →
	Partial evidence “At SAQAYA, we grow businesses by engineering technology that customers love!” Source: RevenueBase Database · checked Sep 24, 2026
21	Stallions Technologies	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	35 contacts →
	Indirect evidence “At Stallions Technologies, we passionately believe that we are successful in delivering excellence to our clients because we deliberately seek to hire 'Brilliant' people.” Source: RevenueBase Database · checked Sep 24, 2026
22	A-Development	Strong evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	35 contacts →
	Strong evidence “A-development is a custom software development company that offers smart services for a wide range of businesses.” Source: RevenueBase Database · checked Sep 24, 2026
23	Geecon Global Limited	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	34 contacts →
	Partial evidence “Headquartered in London, United Kingdom, Geecon combines a passion for Client Satisfaction, Technology Innovation, Business and Management Consultancy, Software Solution and IT…” Source: RevenueBase Database · checked Sep 24, 2026
24	Avidi Technologies	Indirect evidence	London, United KingdomHQ checked Sep 24, 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 24, 2026
25	Blackwater Tech	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	11-50	33 contacts →
	Indirect evidence “At Blackwater Tech, we help clients accelerate growth and improve performance through tailored technology solutions.” 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 software consultancies. 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 software consultancies.
Partial evidence: Its own public description names part of custom software consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom software consultancies. 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 739 custom software consultancies based in London, United Kingdom

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Custom software consultancies based in London, United Kingdom at a glance

As of Sep 24, 2026

46.5%Verified-email coverage

21.1Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

456

11-50

213

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 739 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 custom software consultancies, 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 London, United Kingdom whose own description of what they do matches “custom software consultancies”. 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 software consultancies), 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 software consultancies, and records with no verified work email. Companies headquartered outside London 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, 7,259 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 software consultancies by metro in the United Kingdom

Custom software consultancies in London739
Custom software consultancies in Manchester69
Custom software consultancies in Birmingham34
Custom software consultancies in Leeds33
Custom software consultancies in Glasgow30
Custom software consultancies in Bristol29

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 software consultancies, 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 software consultancies are there based in London, United Kingdom?

RevenueBase identified 739 custom software consultancies headquartered in London, 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?

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

Which city has the most custom software consultancies?

London leads with 739 headquartered companies, followed by Manchester (69) and Birmingham (34).

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 7,259 verified decision-maker contacts tracked across these 739 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.