Company lists · Data refreshed September 2026

Top 25 Business IT services based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 1,754 companies tracked

RevenueBase identified 1,754 business IT services headquartered in London, United Kingdom as of September 2026 and tracks 41,583 professional contacts across them, including 16,754 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers business IT services 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 23, 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 23, 2026 86% judged on-target in blind review

1,754Companies

41,583Contacts tracked

16,754Verified emails

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The 25 largest business IT services based in London, United Kingdom

Ranked by team size

Top 25 of 1,754 business IT services based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to business IT services: 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 23, 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 23, 2026
2	CAPCO	Indirect evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
3	Noventiq	Indirect evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
4	NSC Global	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	1,001-5,000	1,039 contacts →
	Indirect evidence “Global business doesn’t have to be complicated.” Source: RevenueBase Database · checked Sep 23, 2026
5	Advania UK	Indirect evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
6	KERV	Indirect evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
7	VML Enterprise Solutions	Indirect evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
8	Fortray Global Service Limited	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	501-1,000	552 contacts →
	Indirect evidence “Fortray is a strategic technology partner helping organisations accelerate digital transformation, strengthen cybersecurity, and maximise business performance through…” Source: RevenueBase Database · checked Sep 23, 2026
9	Acuvate	Indirect evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
10	Zenitech	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	501-1,000	408 contacts →
	Indirect evidence “Zenitech creates technology to transform businesses.” Source: RevenueBase Database · checked Sep 23, 2026
11	KIN Carta	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	5,001-10,000	400 contacts →
	Indirect evidence “Kin + Carta was acquired by Valtech in 2024.” Source: RevenueBase Database · checked Sep 23, 2026
12	Total IT Global	Strong evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	286 contacts →
	Strong 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 23, 2026
13	Devtech	Indirect evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
14	Cloudreach, An Eviden Business	Indirect evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
15	The Adaptavist Group	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	1,001-5,000	254 contacts →
	Indirect evidence “We are experts at delivering innovative software, tailored solutions, and quality services across some of the world's most trusted technology ecosystems, including Atlassian, AWS…” Source: RevenueBase Database · checked Sep 23, 2026
16	Flat Rock Technology	Indirect evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
17	Tmotions Global Limited	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	228 contacts →
	Indirect evidence “TMotions is inspired by forward-thinking businesses, who are now looking past recovery and shifting into the growth mode.” Source: RevenueBase Database · checked Sep 23, 2026
18	Natilik	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	222 contacts →
	Indirect evidence “Natilik is your technology solutions partner and confident guide to digital transformation, specialising in a range of solutions to help you achieve your goals and drive real…” Source: RevenueBase Database · checked Sep 23, 2026
19	Fusion Global Business Solutions	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	51-200	219 contacts →
	Indirect evidence “As a global leader in service management, we help businesses transform their operations with data-driven insights, scalable digital solutions, and measurable results.” Source: RevenueBase Database · checked Sep 23, 2026
20	Cisilion	Indirect evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
21	EJC IT	Strong evidence	London, United KingdomHQ checked Sep 23, 2026	n/a	189 contacts →
	Strong evidence “EJC is a small IT service provider specialising in supporting and enabling small, growing businesses by providing tailored IT services.” Source: RevenueBase Database · checked Sep 23, 2026
22	Azurian	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	178 contacts →
	Indirect evidence “The future has never moved this fast.” Source: RevenueBase Database · checked Sep 23, 2026
23	CVL	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	n/a	165 contacts →
	Indirect evidence “Strategic development for already dynamic businesses, successful mergers & acquisitions between household names, technology planning in cutting edge industries and real-world…” Source: RevenueBase Database · checked Sep 23, 2026
24	Interex Group	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	51-200	160 contacts →
	Indirect evidence “InterEx Group is becoming the strategic partner of choice for organizations undergoing digital, business, and technology transformation.” Source: RevenueBase Database · checked Sep 23, 2026
25	Dogma Group	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	51-200	149 contacts →
	Indirect evidence “The Dogma Group is a progressive digital transformation company committed to delivering the digital imperative and becoming the most trusted advisor to its clientele.” Source: RevenueBase Database · checked Sep 23, 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: business IT services. 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 business IT services.
Partial evidence: Its own public description names part of business IT services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name business IT services. 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 1,754 business IT services based in London, United Kingdom

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Business IT services based in London, United Kingdom at a glance

As of Sep 23, 2026

40.3%Verified-email coverage

23.7Average contacts per company

1-10Median size (employees)

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

983

11-50

516

51-200

176

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 1,754 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 business IT services, 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 “business IT services”. 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 business IT services), 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 business IT services, 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, 16,754 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 23, 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.

Business IT services 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 business IT services, 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 business IT services are there based in London, United Kingdom?

RevenueBase identified 1,754 business IT services 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 business IT services?

London leads the United Kingdom with 1,754 headquartered companies, followed by Manchester (138) and Birmingham (95).

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 16,754 verified decision-maker contacts tracked across these 1,754 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 23, 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.