Company lists · Data refreshed September 2026

Top 25 Computer consulting firms based in London, United Kingdom

Name: Computer consulting 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 24, 2026 2,427 companies tracked

RevenueBase identified 2,427 computer consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 75,033 professional contacts across them, including 24,338 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers computer consulting firms 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

2,427Companies

75,033Contacts tracked

24,338Verified emails

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The 25 largest computer consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 2,427 computer consulting firms 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 computer consulting firms: 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	CAPCO	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	5,001-10,000	7,396 contacts →
	Indirect evidence “Capco, a Wipro company, is a global technology and management consultancy specializing in driving digital transformation in the financial services industry.” Source: RevenueBase Database · checked Sep 24, 2026
3	Computer Futures	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	2,673 contacts →
	Partial evidence “Building tomorrow’s tech landscape together Computer Futures is a Technology specialist, part of SThree, the global STEM workforce consultancy.” Source: RevenueBase Database · checked Sep 24, 2026
4	Nashtech	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	1,001-5,000	1,611 contacts →
	Indirect evidence “We are experts in technology, delivering smart solutions that solve business challenges and create value.” Source: RevenueBase Database · checked Sep 24, 2026
5	Noventiq	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	5,001-10,000	1,508 contacts →
	Indirect evidence “Noventiq (Noventiq Holdings PLC) is a leading global solutions and services provider in digital transformation and cybersecurity, headquartered in London.” Source: RevenueBase Database · checked Sep 24, 2026
6	K2 Partnering Solutions	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	1,001-5,000	1,417 contacts →
	Indirect evidence “K2 Partnering Solutions is a global provider of unique end-to-end consultative solutions in the enterprise applications, AI, and cloud space.” Source: RevenueBase Database · checked Sep 24, 2026
7	Equal Experts	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	1,001-5,000	1,172 contacts →
	Indirect evidence “We are honoured to be recognised as one of the Top 10 Best Places to Work in the UK for the third year running, according to Glassdoor’s prestigious 2026 list.” Source: RevenueBase Database · checked Sep 24, 2026
8	NSC Global	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	1,001-5,000	1,039 contacts →
	Indirect evidence “Global business doesn’t have to be complicated.” Source: RevenueBase Database · checked Sep 24, 2026
9	Advania UK	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	1,001-5,000	910 contacts →
	Indirect evidence “We empower people to create sustainable value with the clever use of technology.” Source: RevenueBase Database · checked Sep 24, 2026
10	KERV	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	742 contacts →
	Indirect evidence “Kerv exists to use the power of technology for good: for our customers, our people, our communities and the planet.” Source: RevenueBase Database · checked Sep 24, 2026
11	VML Enterprise Solutions	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	5,001-10,000	697 contacts →
	Indirect evidence “Follow us now at WPP Enterprise Solutions, WPP’s global business transformation unit, designing, building and operating the growth systems that competitive businesses rely on.” Source: RevenueBase Database · checked Sep 24, 2026
12	Acuvate	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	545 contacts →
	Indirect evidence “At Acuvate, we empower enterprises to accelerate their Next gen transformation journeys with an AI-First approach.” Source: RevenueBase Database · checked Sep 24, 2026
13	Alten LTD - UK	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	10001+	529 contacts →
	Indirect evidence “We are a leading Engineering and IT consultancy operating across all sectors in 30 different countries.” Source: RevenueBase Database · checked Sep 24, 2026
14	Hitachi Solutions UK	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	422 contacts →
	Indirect evidence “Our team of world-class professionals across the globe work together to innovate and enable sustainable business transformation.” Source: RevenueBase Database · checked Sep 24, 2026
15	Zenitech	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	408 contacts →
	Indirect evidence “Zenitech creates technology to transform businesses.” Source: RevenueBase Database · checked Sep 24, 2026
16	Zenzero	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	401 contacts →
	Indirect evidence “We believe successful businesses are underpinned by quality IT infrastructure.” Source: RevenueBase Database · checked Sep 24, 2026
17	KIN Carta	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	5,001-10,000	400 contacts →
	Indirect evidence “Kin + Carta was acquired by Valtech in 2024.” Source: RevenueBase Database · checked Sep 24, 2026
18	Connect	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	398 contacts →
	Indirect evidence “We’re Connect, a global systems integrator and digital transformation expert with over 35 years of experience.” Source: RevenueBase Database · checked Sep 24, 2026
19	Sandhata Technologies	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	363 contacts →
	Indirect evidence “We are a global niche consultancy specialising in services that span all facets of Digital transformation, DevOps, and System Integration.” Source: RevenueBase Database · checked Sep 24, 2026
20	Softwire	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	360 contacts →
	Indirect evidence “Softwire exists to help organisations use technology to deliver meaningful outcomes and a positive impact for themselves, their users and the world.” Source: RevenueBase Database · checked Sep 24, 2026
21	Cartesian	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	302 contacts →
	Partial evidence “Cartesian is a specialist consulting firm focused on the global telecommunications, media, and technology industries and is now part of Bounteous, an AI services firm helping…” Source: RevenueBase Database · checked Sep 24, 2026
22	KOCHO	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	295 contacts →
	Indirect evidence “At Kocho, we believe greatness lies in everyone.” Source: RevenueBase Database · checked Sep 24, 2026
23	Total IT Global	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	286 contacts →
	Indirect evidence “At Total IT Global, we elevate your digital journey with cutting-edge innovation, to achieve your vision of ‘the enterprise of the future’.” Source: RevenueBase Database · checked Sep 24, 2026
24	Devtech	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	266 contacts →
	Indirect evidence “Devtech provides outcome-driven digital innovation services and helps companies better respond to change.” Source: RevenueBase Database · checked Sep 24, 2026
25	Cloudreach, An Eviden Business	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	261 contacts →
	Indirect evidence “As of April 2023, Cloudreach is now part of Eviden, an atos business.” 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: computer consulting firms. 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 computer consulting firms.
Partial evidence: Its own public description names part of computer consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name computer consulting firms. 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 2,427 computer consulting firms based in London, United Kingdom

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Computer consulting firms based in London, United Kingdom at a glance

As of Sep 24, 2026

32.4%Verified-email coverage

30.9Average contacts per company

1-10Median size (employees)

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

1,379

11-50

654

51-200

256

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 2,427 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 computer consulting firms, 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 “computer consulting firms”. 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 computer consulting firms), 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 computer consulting firms, 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, 24,338 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.

Computer consulting firms by metro in the United Kingdom

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 computer consulting firms, 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 computer consulting firms are there based in London, United Kingdom?

RevenueBase identified 2,427 computer consulting firms 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 in the United Kingdom has the most computer consulting firms?

London leads the United Kingdom with 2,427 headquartered companies, followed by Manchester (151) and Birmingham (106).

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 24,338 verified decision-maker contacts tracked across these 2,427 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.