Company lists · Data refreshed September 2026

Top 25 Global IT consulting firms based in London, United Kingdom

Name: Global IT 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 30, 2026 1,113 companies tracked

RevenueBase identified 1,113 global IT consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 40,403 professional contacts across them, including 16,832 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers global IT 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 30, 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 30, 2026 86% judged on-target in blind review

1,113Companies

40,403Contacts tracked

16,832Verified emails

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The 25 largest global IT consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 1,113 global IT consulting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to global IT 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 30, 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 30, 2026
2	FDM Group	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	1,001-5,000	4,583 contacts →
	Partial evidence “We’re FDM, an award-winning global business and technology consultancy.” Source: RevenueBase Database · checked Sep 30, 2026
3	Computer Futures	Partial evidence	London, United KingdomHQ checked Sep 30, 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 30, 2026
4	K2 Partnering Solutions	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	1,001-5,000	1,417 contacts →
	Partial 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 30, 2026
5	Equal Experts	Indirect evidence	London, United KingdomHQ checked Sep 30, 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 30, 2026
6	NSC Global	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	1,001-5,000	1,039 contacts →
	Partial evidence “Global business doesn’t have to be complicated.” Source: RevenueBase Database · checked Sep 30, 2026
7	Excis Compliance	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	1,001-5,000	616 contacts →
	Strong evidence “Excis is a trusted global IT services company, delivering agile, multilingual support across 150+ countries.” Source: RevenueBase Database · checked Sep 30, 2026
8	Hirexa Solutions	Indirect evidence	London, United KingdomHQ checked Sep 30, 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 30, 2026
9	Sandhata Technologies	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	201-500	363 contacts →
	Partial 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 30, 2026
10	Ubique Systems	Partial evidence	London, United KingdomHQ checked Sep 30, 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 30, 2026
11	Cartesian	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	201-500	302 contacts →
	Strong 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 30, 2026
12	Elixirr	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	501-1,000	275 contacts →
	Strong evidence “An award-winning global consulting firm working with clients across a diverse range of markets, industries and geographies.” Source: RevenueBase Database · checked Sep 30, 2026
13	Cisilion	Indirect evidence	London, United KingdomHQ checked Sep 30, 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 30, 2026
14	Azurian	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	201-500	178 contacts →
	Indirect evidence “The future has never moved this fast.” Source: RevenueBase Database · checked Sep 30, 2026
15	Next Ventures	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	176 contacts →
	Partial evidence “Next Ventures is a multi-award winning, global I.T recruitment business, supplying specialist project teams to the Large Enterprise.” Source: RevenueBase Database · checked Sep 30, 2026
16	BIP UK	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	5,001-10,000	167 contacts →
	Partial evidence “BIP is the international consultancy for the 21st century with over 6,500 consultants globally daring to make a difference.” Source: RevenueBase Database · checked Sep 30, 2026
17	Interex Group	Indirect evidence	London, United KingdomHQ checked Sep 30, 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 30, 2026
18	ORG	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	1,001-5,000	139 contacts →
	Indirect evidence “We believe that change is an opportunity to thrive.” Source: RevenueBase Database · checked Sep 30, 2026
19	IBU	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	1,001-5,000	139 contacts →
	Strong evidence “We are the most trusted consulting & Information Technology service partner, who has been thriving hard to deliver customer-centric and proven global competence to our clients all…” Source: RevenueBase Database · checked Sep 30, 2026
20	SGI	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	137 contacts →
	Partial evidence “Source Group International is a global, award-winning technology talent partner trusted by ambitious enterprise businesses and professionals worldwide.” Source: RevenueBase Database · checked Sep 30, 2026
21	Opticoreit	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	120 contacts →
	Partial evidence “OpticoreIT is an IT Consultancy founded in 2013 to bridge a gap in the market between the major IT services providers and the consultancy market.” Source: RevenueBase Database · checked Sep 30, 2026
22	Glue Reply	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	118 contacts →
	Partial evidence “WHO WE ARE Glue Reply is a business consultancy that strives to help its clients achieve their future potential by developing solutions that often for the first time align IT…” Source: RevenueBase Database · checked Sep 30, 2026
23	Axiom Software Solutions Limited	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	201-500	114 contacts →
	Strong evidence “Axiom is a global information technology, consulting and outsourcing company and services provider.” Source: RevenueBase Database · checked Sep 30, 2026
24	Oryxalign	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	99 contacts →
	Indirect evidence “OryxAlign creates true alignment that delivers the right outcomes for all.” Source: RevenueBase Database · checked Sep 30, 2026
25	FRG Technology Consulting	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	94 contacts →
	Strong evidence “At FRG Technology Consulting, we help job seekers all over the world to find the best IT and emerging technology roles across a range of industries, including Banking and…” Source: RevenueBase Database · checked Sep 30, 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: global IT 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 global IT consulting firms.
Partial evidence: Its own public description names part of global IT consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name global IT 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 1,113 global IT consulting firms based in London, United Kingdom

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Global IT consulting firms based in London, United Kingdom at a glance

As of Sep 30, 2026

41.7%Verified-email coverage

36.3Average contacts per company

1-10Median size (employees)

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

575

11-50

323

51-200

137

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 1,113 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 global IT 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 “global IT 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 global IT 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 global IT 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, 16,832 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 30, 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.

Global IT 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 global IT 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 global IT consulting firms are there based in London, United Kingdom?

RevenueBase identified 1,113 global IT 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 global IT consulting firms?

London leads the United Kingdom with 1,113 headquartered companies, followed by Birmingham (49) and Manchester (45).

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 16,832 verified decision-maker contacts tracked across these 1,113 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 30, 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.