Company lists · Data refreshed September 2026

Top 25 IT services consulting companies based in London, United Kingdom

Name: IT services consulting companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 2,619 companies tracked

RevenueBase identified 2,619 IT services consulting companies headquartered in London, United Kingdom as of September 2026 and tracks 64,245 professional contacts across them, including 18,854 with verified work emails. London is the largest hub.

This list covers IT services consulting companies 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 27, 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 27, 2026 86% judged on-target in blind review

2,619Companies

64,245Contacts tracked

18,854Verified emails

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The 25 largest IT services consulting companies based in London, United Kingdom

Ranked by team size

Top 25 of 2,619 IT services consulting companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to IT services consulting companies: 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 27, 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 27, 2026
2	Computer Futures	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	501-1,000	2,673 contacts →
	Indirect 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 27, 2026
3	CSC UKI	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	10001+	1,569 contacts →
	Partial evidence “HPE Enterprise Services and CSC are now @DXCTechnology, the leading independent, end-to-end #IT services company.” Source: RevenueBase Database · checked Sep 27, 2026
4	K2 Partnering Solutions	Indirect evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
5	Genisys Group	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	1,001-5,000	1,178 contacts →
	Indirect evidence “Genisys Group is a new age global information technology and business process services company.” Source: RevenueBase Database · checked Sep 27, 2026
6	Equal Experts	Indirect evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
7	NSC Global	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	1,001-5,000	1,039 contacts →
	Indirect evidence “Global business doesn’t have to be complicated.” Source: RevenueBase Database · checked Sep 27, 2026
8	Delta Capita	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1,001-5,000	976 contacts →
	Partial evidence “Delta Capita is a leading global Capital Markets consulting, managed services, and technology provider with a unique combination of experience in financial services and capability…” Source: RevenueBase Database · checked Sep 27, 2026
9	KERV	Indirect evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
10	VML Enterprise Solutions	Indirect evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
11	Exponential-E	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	501-1,000	667 contacts →
	Indirect evidence “Innovation is at the core of Exponential-e, and has been since our inception in 2002.” Source: RevenueBase Database · checked Sep 27, 2026
12	Excis Compliance	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1,001-5,000	616 contacts →
	Partial evidence “Excis is a trusted global IT services company, delivering agile, multilingual support across 150+ countries.” Source: RevenueBase Database · checked Sep 27, 2026
13	Telefónica Tech EN	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	1,001-5,000	539 contacts →
	Indirect evidence “We are accelerating the roll-out of technology through Cybersecurity, Cloud, IoT, Data & Artificial Intelligence Follow on our social media channels: • X: https://x.com/TefTech_EN…” Source: RevenueBase Database · checked Sep 27, 2026
14	Zenzero	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	501-1,000	401 contacts →
	Partial evidence “We believe successful businesses are underpinned by quality IT infrastructure.” Source: RevenueBase Database · checked Sep 27, 2026
15	Hirexa Solutions	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	201-500	377 contacts →
	Indirect evidence “Hirexa Solutions is a leading group of companies committed to delivering exceptional services to Fortune 500 clients worldwide.” Source: RevenueBase Database · checked Sep 27, 2026
16	Sandhata Technologies	Indirect evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
17	Maintel	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	201-500	341 contacts →
	Indirect evidence “Maintel is a communications managed services provider.” Source: RevenueBase Database · checked Sep 27, 2026
18	Ubique Systems	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	501-1,000	333 contacts →
	Partial evidence “Ubique Systems is a fast growing multifaceted organization which offers a comprehensive array of outsourcing and consulting services for its customers, including recruitment…” Source: RevenueBase Database · checked Sep 27, 2026
19	Momenta	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	313 contacts →
	Indirect evidence “With over 30 years of experience servicing blue-chip clients, Momenta Group is renowned for our expertise and quality-driven approach.” Source: RevenueBase Database · checked Sep 27, 2026
20	Cartesian	Partial evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
21	KOCHO	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	201-500	295 contacts →
	Indirect evidence “At Kocho, we believe greatness lies in everyone.” Source: RevenueBase Database · checked Sep 27, 2026
22	Flat Rock Technology	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	201-500	231 contacts →
	Indirect evidence “Since 2008, Flat Rock Technology, a software engineering, SI, Cloud DevOps, Cyber Security, and Customer Experience (CX) company, has been at the forefront of providing innovative…” Source: RevenueBase Database · checked Sep 27, 2026
23	Wanstor	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	201-500	227 contacts →
	Partial evidence “Wanstor: Experience First \| AI Fluent \| Secure by Default Wanstor is a trusted Managed IT Services company that helps ambitious organisations leverage technology to achieve better…” Source: RevenueBase Database · checked Sep 27, 2026
24	Cisilion	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	194 contacts →
	Indirect evidence “Combining market-leading tech with world-class service, we go above and beyond expectations to ensure our clients are ready for a digital future.” Source: RevenueBase Database · checked Sep 27, 2026
25	Absolutelabs	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	201-500	192 contacts →
	Indirect evidence “AbsoluteLabs is a Salesforce Summit Partner and partner of Microsoft Azure, Amazon Web Services, and Google Cloud Platform.” Source: RevenueBase Database · checked Sep 27, 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: IT services consulting companies. 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 IT services consulting companies.
Partial evidence: Its own public description names part of IT services consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT services consulting companies. 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 2,619 IT services consulting companies based in London, United Kingdom

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IT services consulting companies based in London, United Kingdom at a glance

As of Sep 27, 2026

29.3%Verified-email coverage

24.5Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

1,520

11-50

713

51-200

255

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 2,619 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 IT services consulting companies, 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 “IT services consulting companies”. 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 IT services consulting companies), 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 IT services consulting companies, 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, 18,854 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 27, 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.

IT services consulting companies by metro in the United Kingdom

IT services consulting companies in London2619
IT services consulting companies in Manchester178
IT services consulting companies in Birmingham125
IT services consulting companies in Bristol94
IT services consulting companies in Leeds80
IT services consulting companies in Reading75
IT services consulting companies in Glasgow73
IT services consulting companies in Edinburgh69
IT services consulting companies in Milton Keynes61
IT services consulting companies in Sheffield48
IT services consulting companies in Cambridge47
IT services consulting companies in Liverpool46
IT services consulting companies in Cardiff39
IT services consulting companies in Coventry39
IT services consulting companies in Leicester39
IT services consulting companies in Nottingham36
IT services consulting companies in Harrow35
IT services consulting companies in Southampton35
IT services consulting companies in Derby34
IT services consulting companies in Northampton34
IT services consulting companies in Poole31
IT services consulting companies in Watford31
IT services consulting companies in Slough30
IT services consulting companies in Oxford29
IT services consulting companies in Bournemouth28
IT services consulting companies in Brighton28
IT services consulting companies in Ilford28
IT services consulting companies in Luton28
IT services consulting companies in Aberdeen27
IT services consulting companies in Newcastle Upon Tyne26
IT services consulting companies in Swindon25

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 IT services consulting companies, 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 IT services consulting companies are there based in London, United Kingdom?

RevenueBase identified 2,619 IT services consulting companies 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 IT services consulting companies?

London leads with 2619 headquartered companies, followed by Manchester (178) and Birmingham (125).

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 18,854 verified decision-maker contacts tracked across these 2,619 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 27, 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.