Company lists · Data refreshed September 2026
Top 25 Data and technology consulting firms based in London, United Kingdom
RevenueBase identified 2,909 data and technology consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 76,198 professional contacts across them, including 26,158 with verified work emails. Across the United Kingdom, London is the largest hub for this category.
This list covers data and technology 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 24, 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 data and technology consulting firms based in London, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 9,653 contacts → | ||||
Partial evidence “For over two decades, we have been harnessing technology to drive meaningful change.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 2 | 7,396 contacts → | ||||
Partial 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 24, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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 24, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,663 contacts → | ||||
Partial evidence “CACI offers an unrivalled range of data, marketing and IT solutions to a wide range of industries across both the public and private sectors.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 24, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,100 contacts → | ||||
Partial evidence “Smartstream unlocks trusted, intelligent data insights – clearly, consistently, and without compromise.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 7 | 976 contacts → | ||||
Strong 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 24, 2026Thanks. The Data Team will review it. | |||||
| 8 | 702 contacts → | ||||
Indirect evidence “We provide high performing intelligence that answers critical business questions for leading companies around the world.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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 24, 2026Thanks. The Data Team will review it. | |||||
| 10 | 539 contacts → | ||||
Strong evidence “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…” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 11 | 459 contacts → | ||||
Partial 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 24, 2026Thanks. The Data Team will review it. | |||||
| 12 | 422 contacts → | ||||
Indirect evidence “Our team of world-class professionals across the globe work together to innovate and enable sustainable business transformation.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 13 | 408 contacts → | ||||
Partial evidence “Zenitech creates technology to transform businesses.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 14 | 400 contacts → | ||||
Indirect evidence “Kin + Carta was acquired by Valtech in 2024.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 15 | 375 contacts → | ||||
Partial evidence “Quick Release_ is a go-to global provider of Product and Engineering Data management.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 16 | 368 contacts → | ||||
Indirect evidence “Merkle, a dentsu company, powers the experience economy.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 17 | 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 24, 2026Thanks. The Data Team will review it. | |||||
| 18 | 360 contacts → | ||||
Partial 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 24, 2026Thanks. The Data Team will review it. | |||||
| 19 | 337 contacts → | ||||
Strong evidence “CONTEXT forecasts, analytics and data-management solutions are embedded in the information systems of the world's major technology companies.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 20 | 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 24, 2026Thanks. The Data Team will review it. | |||||
| 21 | 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 24, 2026Thanks. The Data Team will review it. | |||||
| 22 | 299 contacts → | ||||
Partial evidence “At Fusion Practices, we specialise in delivering data driven projects and finance transformations.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 23 | 286 contacts → | ||||
Indirect 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 24, 2026Thanks. The Data Team will review it. | |||||
| 24 | 284 contacts → | ||||
Strong 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 24, 2026Thanks. The Data Team will review it. | |||||
| 25 | 266 contacts → | ||||
Indirect evidence “Devtech provides outcome-driven digital innovation services and helps companies better respond to change.” Source: RevenueBase Database · checked Sep 24, 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: data and technology 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 data and technology consulting firms.
- Partial evidence
- Its own public description names part of data and technology consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name data and technology 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 2,909 data and technology consulting firms based in London, United Kingdom
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Data and technology consulting firms based in London, United Kingdom at a glance
As of Sep 24, 2026Companies by employee count
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 2,909 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 data and technology 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 “data and technology 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 data and technology 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 data and technology 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, 26,158 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 24, 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.
Data and technology consulting firms by metro in the United Kingdom
- Data and technology consulting firms in Manchester155
- Data and technology consulting firms in Birmingham92
- Data and technology consulting firms in Bristol84
- Data and technology consulting firms in Leeds82
- Data and technology consulting firms in Glasgow69
- Data and technology consulting firms in Reading67
- Data and technology consulting firms in Edinburgh61
- Data and technology consulting firms in Milton Keynes45
- Data and technology consulting firms in Sheffield45
- Data and technology consulting firms in Cambridge42
- Data and technology consulting firms in Liverpool37
- Data and technology consulting firms in Oxford37
- Data and technology consulting firms in Cardiff34
- Data and technology consulting firms in Coventry31
- Data and technology consulting firms in Newcastle Upon Tyne31
- Data and technology consulting firms in Derby30
- Data and technology consulting firms in York25
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 data and technology 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 data and technology consulting firms are there based in London, United Kingdom?
RevenueBase identified 2,909 data and technology 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 data and technology consulting firms?
London leads the United Kingdom with 2,909 headquartered companies, followed by Manchester (155) and Birmingham (92).
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 26,158 verified decision-maker contacts tracked across these 2,909 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 24, 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.
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