Company lists · Data refreshed September 2026

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

Name: IT services and IT 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 2,467 companies tracked

RevenueBase identified 2,467 company matches for IT services and IT consulting companies associated with London, United Kingdom as of September 2026 and tracks 62,785 professional contacts across them, including 16,112 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for IT services and IT consulting companies 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 27, 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 27, 2026 How this list was built

2,467Companies

62,785Contacts tracked

16,112Verified emails

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

Ranked by team size

Top 25 of 2,467 company matches for IT services and IT consulting companies based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 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	Endava	Exact match	London, United KingdomHQ recorded Sep 27, 2026	10001+	9,653 contacts →
	Exact match “For over two decades, we have been harnessing technology to drive meaningful change.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
2	Computer Futures	Exact match	London, United KingdomHQ recorded Sep 27, 2026	501-1,000	2,673 contacts →
	Exact match “Building tomorrow’s tech landscape together Computer Futures is a Technology specialist, part of SThree, the global STEM workforce consultancy.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3	CSC UKI	Exact match	London, United KingdomHQ recorded Sep 27, 2026	10001+	1,569 contacts →
	Exact match “HPE Enterprise Services and CSC are now @DXCTechnology, the leading independent, end-to-end #IT services company.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4	Noventiq	Exact match	London, United KingdomHQ recorded Sep 27, 2026	5,001-10,000	1,508 contacts →
	Exact match “Noventiq (Noventiq Holdings PLC) is a leading global solutions and services provider in digital transformation and cybersecurity, headquartered in London.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5	K2 Partnering Solutions	Exact match	London, United KingdomHQ recorded Sep 27, 2026	1,001-5,000	1,417 contacts →
	Exact match “K2 Partnering Solutions is a global provider of unique end-to-end consultative solutions in the enterprise applications, AI, and cloud space.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6	Genisys Group	Exact match	London, United KingdomHQ recorded Sep 27, 2026	1,001-5,000	1,178 contacts →
	Exact match “Genisys Group is a new age global information technology and business process services company.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7	NSC Global	Exact match	London, United KingdomHQ recorded Sep 27, 2026	1,001-5,000	1,039 contacts →
	Exact match “Global business doesn’t have to be complicated.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8	Advania UK	Exact match	London, United KingdomHQ recorded Sep 27, 2026	1,001-5,000	910 contacts →
	Exact match “We empower people to create sustainable value with the clever use of technology.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9	KERV	Exact match	London, United KingdomHQ recorded Sep 27, 2026	501-1,000	742 contacts →
	Exact match “Kerv exists to use the power of technology for good: for our customers, our people, our communities and the planet.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10	Exponential-E	Exact match	London, United KingdomHQ recorded Sep 27, 2026	501-1,000	667 contacts →
	Exact match “Innovation is at the core of Exponential-e, and has been since our inception in 2002.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11	Excis Compliance	Exact match	London, United KingdomHQ recorded Sep 27, 2026	1,001-5,000	616 contacts →
	Exact match “Excis is a trusted global IT services company, delivering agile, multilingual support across 150+ countries.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12	Telefónica Tech EN	Exact match	London, United KingdomHQ recorded Sep 27, 2026	1,001-5,000	539 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13	Hirexa Solutions	Exact match	London, United KingdomHQ recorded Sep 27, 2026	201-500	377 contacts →
	Exact match “Hirexa Solutions is a leading group of companies committed to delivering exceptional services to Fortune 500 clients worldwide.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14	Maintel	Exact match	London, United KingdomHQ recorded Sep 27, 2026	201-500	341 contacts →
	Exact match “Maintel is a communications managed services provider.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15	Ubique Systems	Exact match	London, United KingdomHQ recorded Sep 27, 2026	501-1,000	333 contacts →
	Exact match “Ubique Systems is a fast growing multifaceted organization which offers a comprehensive array of outsourcing and consulting services for its customers, including recruitment…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16	Cartesian	Exact match	London, United KingdomHQ recorded Sep 27, 2026	201-500	302 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17	KOCHO	Exact match	London, United KingdomHQ recorded Sep 27, 2026	201-500	295 contacts →
	Exact match “At Kocho, we believe greatness lies in everyone.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18	Total IT Global	Exact match	London, United KingdomHQ recorded Sep 27, 2026	201-500	286 contacts →
	Exact match “At Total IT Global, we elevate your digital journey with cutting-edge innovation, to achieve your vision of ‘the enterprise of the future’.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19	SIX Degrees	Exact match	London, United KingdomHQ recorded Sep 27, 2026	201-500	279 contacts →
	Exact match “At Six Degrees we’re all about enabling our clients’ success through technology.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20	Cloudreach, An Eviden Business	Exact match	London, United KingdomHQ recorded Sep 27, 2026	501-1,000	261 contacts →
	Exact match “As of April 2023, Cloudreach is now part of Eviden, an atos business.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21	Flat Rock Technology	Exact match	London, United KingdomHQ recorded Sep 27, 2026	201-500	231 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22	QODEA	Exact match	London, United KingdomHQ recorded Sep 27, 2026	201-500	231 contacts →
	Exact match “Qodea, powered by Beyond, are a technology group building the world's leading cloud and cybersecurity solutions, from foundational infrastructure to advanced AI.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23	Wanstor	Exact match	London, United KingdomHQ recorded Sep 27, 2026	201-500	227 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24	Cisilion	Exact match	London, United KingdomHQ recorded Sep 27, 2026	51-200	194 contacts →
	Exact match “Combining market-leading tech with world-class service, we go above and beyond expectations to ensure our clients are ready for a digital future.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25	Intragen	Exact match	London, United KingdomHQ recorded Sep 27, 2026	201-500	190 contacts →
	Exact match “Intragen is a cyber security business focused on managed Identity solutions and services.” Recorded in the RevenueBase company graph · Sep 27, 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 “IT services and IT consulting companies”. 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 25 of 2,467 IT services and IT consulting companies based in London, United Kingdom

See the full list, filter by size, metro and specialty, and access 16,112 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Sep 27, 2026

25.7%Verified-email coverage

25.4Average contacts per company

1-10Median size (employees)

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

1,369

11-50

704

51-200

265

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 2,467 companies.

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 “IT services and IT consulting companies” 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 16,112 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 27, 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.

IT services and IT consulting companies 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 “IT services and IT consulting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 2,467 company matches for IT services and IT consulting companies 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?

Endava 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 IT services and IT consulting companies?

London leads the United Kingdom with 2,467 company records, followed by Manchester (183) and Birmingham (135).

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 16,112 professional contacts with verified work emails tracked across these 2,467 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 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 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.