Company lists · Data refreshed August 2026
Top 25 AI consulting firms based in London, United Kingdom
RevenueBase identified 648 AI consulting firms headquartered in London, United Kingdom as of August 2026 and tracks 9,090 professional contacts across them, including 2,813 with verified work emails and 820 with mobile numbers. London is the largest hub.
This list covers AI 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 August 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.
The 25 largest AI consulting firms based in London, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,499 contacts → | ||||
Strong evidence “The Hackett Group, Inc.(NASDAQ: HCKT) is a Gen AI strategic consulting and executive advisory firm that enables Digital World Class® performance.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,240 contacts → | ||||
Strong evidence “Hyperlink InfoSystem is a globally trusted IT consulting and mobile app development company at the forefront of AI-driven development, helping startups, enterprises, and global…” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,003 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 Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 4 | 565 contacts → | ||||
Partial evidence “Founded in 2014, Faculty is one of Europe’s leading applied AI companies.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 5 | 399 contacts → | ||||
Partial evidence “At VentureDive, we specialize in building scalable, intelligent solutions that unlock the power of Data and AI.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 6 | 271 contacts → | ||||
Partial evidence “Innova-tsn is a Spanish multinational consulting firm founded 21 years ago, which has grown to position itself as one of the undisputed industry leaders in the design and…” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 7 | 224 contacts → | ||||
Indirect evidence “Keepler now is part of Accenture.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 8 | 150 contacts → | ||||
Partial evidence “CloudSmiths is a technology consultancy specialising in data analytics, machine learning, software development, AI and business reporting in the cloud.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 9 | 96 contacts → | ||||
Indirect evidence “Run your most expensive operations for a third of the cost.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 10 | 90 contacts → | ||||
Partial evidence “Optima Partners' AI-led approach to business transformation integrates scalable, systemised decision-making with comprehensive, tailored solutions.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 11 | 79 contacts → | ||||
Partial evidence “To this day, we’ve delivered projects, driven by a passion for solving real business problems with data and AI.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 12 | 70 contacts → | ||||
Partial evidence “Network Science is a global AI company founded in London in 2020, with one mission: helping enterprises become AI-first, not in strategy documents, but in daily operations.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 13 | 69 contacts → | ||||
Indirect evidence “Altius is now an Avanade company.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 14 | 53 contacts → | ||||
Partial evidence “NexaQuanta delivers Responsible, Safe, and Reliable AI Transformation solutions to help enterprises supercharge performance and modernise software applications using advanced…” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 15 | 53 contacts → | ||||
Strong evidence “Synergo Group is an AI-first consulting and engineering firm helping regulated and mid-market organizations design, govern, and operationalize AI-driven decision systems.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 16 | 52 contacts → | ||||
Indirect evidence “We build digital worlds with our collaborators to ensure all the worlds we live in reap the benefits.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 17 | 50 contacts → | ||||
Partial evidence “Aptitude pairs specialists practitioners with proprietary software-delivering data, AI, and operational transformation at speed, with greater returns and enduring performance.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 18 | 49 contacts → | ||||
Partial evidence “Xanda Ltd is a London-based AI agency and consultancy with more than 27 years of experience delivering digital projects for ambitious brands and market leaders.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 19 | 46 contacts → | ||||
Partial evidence “Celerik powers business innovation with custom AI, data, and software solutions.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 20 | 46 contacts → | ||||
Indirect evidence “Build Circle is a technology consultancy that helps you achieve faster time-to-value, accelerating your future with strategic, data-forward engineering & GenAI.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 21 | 45 contacts → | ||||
Partial evidence “Your Path to Enterprise AI Starts Here.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 22 | 40 contacts → | ||||
Partial evidence “From strategy to implementation, from data platforms to AI solutions - we empower organisations to thrive in the AI-powered economy by combining the best of human and machine.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 23 | 34 contacts → | ||||
Partial evidence “At Avkalan.ai, we help businesses harness the real-world power of Artificial Intelligence with an exclusive focus on SMBs.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 24 | 32 contacts → | ||||
Partial evidence “The consultancy, with an anti-consulting ethos.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 25 | 32 contacts → | ||||
Strong evidence “Beyond is a prominent player in the field of data analysis consultancy services and is renowned for its expertise in AI, data science, and technology consulting.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
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 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 AI consulting firms.
- Partial evidence
- Its own public description names part of AI consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name AI 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 648 AI consulting firms based in London, United Kingdom
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AI consulting firms based in London, United Kingdom at a glance
As of Aug 30, 2026Companies by employee count
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 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 “AI 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 AI 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 AI 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, 2,813 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 August 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.
AI consulting firms by metro in the United Kingdom
- AI consulting firms in London648
- AI consulting firms in Manchester38
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 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 AI consulting firms are there based in London, United Kingdom?
RevenueBase identified 648 AI consulting firms headquartered in London, United Kingdom as of August 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?
The Hackett Group INC, headquartered in London, tops this list with the largest team on record.
Which city has the most AI consulting firms?
London leads with 648 headquartered companies, followed by Manchester (38) and Glasgow (19).
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 2,813 verified decision-maker contacts tracked across these 648 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 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.