Company lists · Data refreshed September 2026

Top 25 AI consultancies based in London, United Kingdom

Name: AI consultancies 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 3,196 companies tracked

RevenueBase identified 3,196 AI consultancies headquartered in London, United Kingdom as of September 2026 and tracks 38,607 professional contacts across them, including 11,184 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers AI consultancies 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

3,196Companies

38,607Contacts tracked

11,184Verified emails

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The 25 largest AI consultancies based in London, United Kingdom

Ranked by team size

Top 25 of 3,196 AI consultancies 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 AI consultancies: 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	Blackmont Consulting	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	1,221 contacts →
	Indirect evidence “Blackmont Consulting provides 100% free advisory services to NGO´s, NPO´s and start-ups.” Source: RevenueBase Database · checked Sep 23, 2026
2	Kubrick Group	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	501-1,000	1,010 contacts →
	Partial evidence “We deliver powerful data and AI solutions that minimize operational cost, strengthen resilience against risk, and uncover revenue opportunity.” Source: RevenueBase Database · checked Sep 23, 2026
3	Delta Capita	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	1,001-5,000	976 contacts →
	Indirect 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 23, 2026
4	Faculty	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	564 contacts →
	Partial evidence “Founded in 2014, Faculty is one of Europe’s leading applied AI companies.” Source: RevenueBase Database · checked Sep 23, 2026
5	Alten LTD - UK	Indirect evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
6	Analysys Mason	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	459 contacts →
	Indirect evidence “Analysys Mason is the leading specialist consultancy, creating lasting value in technology-intensive industries, including telecoms, digital infrastructure, software, IT services…” Source: RevenueBase Database · checked Sep 23, 2026
7	Hirexa Solutions	Indirect evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
8	Sandhata Technologies	Indirect evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
9	Softwire	Indirect evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
10	Ubique Systems	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	501-1,000	333 contacts →
	Indirect 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 23, 2026
11	Solirius Reply	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	51-200	305 contacts →
	Indirect evidence “We are digital transformation specialists, on a mission to make our society an easier and more equitable place for people to live, work and thrive.” Source: RevenueBase Database · checked Sep 23, 2026
12	Cartesian	Partial evidence	London, United KingdomHQ checked Sep 23, 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 23, 2026
13	Datatonic	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	284 contacts →
	Partial evidence “The leading cloud data + AI consultancy, driving business impact for the world's most ambitious businesses, through cutting-edge cloud technologies.” Source: RevenueBase Database · checked Sep 23, 2026
14	Elixirr	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	501-1,000	275 contacts →
	Indirect evidence “An award-winning global consulting firm working with clients across a diverse range of markets, industries and geographies.” Source: RevenueBase Database · checked Sep 23, 2026
15	Sheffield Haworth	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	244 contacts →
	Indirect evidence “Sheffield Haworth is a global consultancy founded in 1993.” Source: RevenueBase Database · checked Sep 23, 2026
16	Thorogood	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	230 contacts →
	Partial evidence “Thorogood is an independent consultancy that provides end-to-end data, AI and analytics solutions.” Source: RevenueBase Database · checked Sep 23, 2026
17	Quantzig	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	216 contacts →
	Indirect evidence “Quantzig is at the forefront of partnering with businesses to help them unlock transformative value through analytics solutions.” Source: RevenueBase Database · checked Sep 23, 2026
18	AYA Data	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	51-200	203 contacts →
	Partial evidence “Aya helps organizations generate value out of data using Data Science and AI.” Source: RevenueBase Database · checked Sep 23, 2026
19	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
20	Clarasys	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	51-200	170 contacts →
	Indirect evidence “We are an employee-owned, award-winning international consulting firm that believes there’s a better way to do consultancy.” Source: RevenueBase Database · checked Sep 23, 2026
21	Satalia	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	169 contacts →
	Partial evidence “Satalia turns business challenges into AI-powered solutions.” Source: RevenueBase Database · checked Sep 23, 2026
22	BIP UK	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	5,001-10,000	167 contacts →
	Indirect 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 23, 2026
23	NEW Street Consulting Group Nscg	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	51-200	167 contacts →
	Indirect evidence “We’re a leading people advisory consultancy that partners with you to source great executives, assess and develop leadership capabilities and expedite change and transformation.” Source: RevenueBase Database · checked Sep 23, 2026
24	Daemon	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	51-200	145 contacts →
	Indirect evidence “Founded in 2007, Daemon is a technology consultancy with a mission to make the world a better place by creating movements that power digital transformation.” Source: RevenueBase Database · checked Sep 23, 2026
25	ORG	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	1,001-5,000	139 contacts →
	Indirect evidence “We believe that change is an opportunity to thrive.” 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: AI consultancies. 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 AI consultancies.
Partial evidence: Its own public description names part of AI consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name AI consultancies. 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 3,196 AI consultancies based in London, United Kingdom

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AI consultancies based in London, United Kingdom at a glance

As of Sep 23, 2026

29.0%Verified-email coverage

12.1Average contacts per company

1-10Median size (employees)

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

2,184

11-50

706

51-200

223

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 3,196 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 AI consultancies, 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 “AI consultancies”. 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 AI consultancies), 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 AI consultancies, 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, 11,184 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.

AI consultancies 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 AI consultancies, 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 AI consultancies are there based in London, United Kingdom?

RevenueBase identified 3,196 AI consultancies 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?

Blackmont Consulting, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most AI consultancies?

London leads the United Kingdom with 3,196 headquartered companies, followed by Manchester (204) and Birmingham (99).

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 11,184 verified decision-maker contacts tracked across these 3,196 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.