Company lists · Data refreshed September 2026
Top 25 IT data companies based in the United Kingdom
RevenueBase identified 1,176 IT data companies headquartered in the United Kingdom as of September 2026 and tracks 20,670 professional contacts across them, including 6,168 with verified work emails. London is the largest hub.
This list covers IT data companies headquartered in the 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 21, 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 IT data companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,663 contacts → | ||||
Strong 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 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 844 contacts → | ||||
Indirect evidence “Complexity isn’t the enemy.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 766 contacts → | ||||
Partial evidence “Bytes is a leading provider of world-class IT solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 764 contacts → | ||||
Partial evidence “MTI provides award-winning, end-to-end technology solutions and services in cyber security and data centre for over 35 years.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 722 contacts → | ||||
Partial evidence “Seagate Cloud Systems and Solutions (formerly Xyratex) provides Intelligent Information Infrastructure, enabling organizations to manage the digital data explosion and deliver on…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 540 contacts → | ||||
Partial evidence “Dimension Data uses the power of technology to help organisations achieve great things.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 539 contacts → | ||||
Partial 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 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 428 contacts → | ||||
Indirect evidence “We’re technology experts trusted by organisations globally to achieve successful business outcomes through our award-winning services and solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 414 contacts → | ||||
Indirect evidence “Iomart combines cutting-edge cloud technology with deep industry expertise to help organisations transform with confidence.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 337 contacts → | ||||
Partial 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 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 337 contacts → | ||||
Indirect evidence “Chess ICT is the UKs leading independent technology service provider, employing more than 240 people across the UK and supporting over customers.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 261 contacts → | ||||
Indirect evidence “As of April 2023, Cloudreach is now part of Eviden, an atos business.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 241 contacts → | ||||
Partial evidence “At Sharp Brains, we are your premier IT Services & Solutions Provider based in the UK, dedicated to meeting your business's unique needs with tailor-made solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 219 contacts → | ||||
Partial evidence “As a global leader in service management, we help businesses transform their operations with data-driven insights, scalable digital solutions, and measurable results.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 206 contacts → | ||||
Partial evidence “Proact is Europe’s leading specialist in data and information management with focus on cloud services and data centre solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 186 contacts → | ||||
Partial evidence “We help you to transform your business with innovative technology, giving you the tools to tap into your data, reduce cost to serve and deliver world-class customer experience.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 174 contacts → | ||||
Partial evidence “LIMA has been solving business challenges since 1997, through the design and delivery of award-winning IT solutions and services across a range of sectors and industries.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 173 contacts → | ||||
Partial evidence “Restore is the UK’s leading provider in integrated information and data management and technology recycling.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 152 contacts → | ||||
Indirect evidence “For over 25 years, Celebrus has set the gold standard globally for improving marketing effectiveness and preventing fraud across all industries.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 141 contacts → | ||||
Strong evidence “Deepscale Technologies provide data center, enterprise & managed IT solutions across the globe that enhance how businesses operate.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 141 contacts → | ||||
Partial evidence “TuTeck Technologies is a next-generation global technology company that empowers enterprises to transform their businesses through data-driven insights and digital innovation.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 135 contacts → | ||||
Strong evidence “CSI, A Park Place Technologies Company, is an IT Managed Services Provider bringing world-class Hybrid Multi-Cloud, Data Protection, and Cyber Security solutions to our clients’…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 116 contacts → | ||||
Partial evidence “Microsoft Partner of the Year 2024, Simpson Associates is a Data Transformation and managed services provider that helps organisations from both the public and private sectors…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 113 contacts → | ||||
Partial evidence “Founded in 2017, Aker is a modern data solutions provider, with offerings ranging from cloud-based software platforms to standardised, repeatable services that assist and empower…” Source: RevenueBase Database · checked Sep 21, 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: IT data companies. 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 IT data companies.
- Partial evidence
- Its own public description names part of IT data companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name IT data companies. 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 1,176 IT data companies based in the United Kingdom
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 6,168 reachable decision-makers.
Free signup · no credit card
IT data companies based in the United Kingdom at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 1,176 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 IT data companies, 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 the United Kingdom whose own description of what they do matches “IT data companies”. 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 IT data companies), 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 IT data companies, and records with no verified work email. Companies headquartered outside United Kingdom 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, 6,168 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 21, 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.
IT data companies by metro
- IT data companies in London314
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 IT data companies, 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 IT data companies are there based in the United Kingdom?
RevenueBase identified 1,176 IT data companies headquartered in the 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?
Caci LTD, headquartered in London, tops this list with the largest team on record.
Which city has the most IT data companies?
London leads with 314 headquartered companies, followed by Manchester (21) and Reading (16).
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 6,168 verified decision-maker contacts tracked across these 1,176 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 21, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,176 IT data companies based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
IT data companies by geography
- IT data companies based in Belo Horizonte, Brazil
- IT data companies based in Curitiba, Brazil
- IT data companies based in Porto Alegre, Brazil
- IT data companies based in Rio De Janeiro, Brazil
- IT data companies based in Calgary, Canada
- IT data companies based in Montreal, Canada
- IT data companies based in Ottawa, Canada
- IT data companies based in Toronto, Canada
- IT data companies based in Ahmedabad, India
- IT data companies based in Bangalore, India
- IT data companies based in Bengaluru, India
- IT data companies based in Chennai, India
Browse the directory
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- IT data companies based in Belo Horizonte, Brazil
- IT data companies based in Curitiba, Brazil
- IT data companies based in Porto Alegre, Brazil
- IT data companies based in Rio De Janeiro, Brazil
- IT data companies based in Calgary, Canada
- IT data companies based in Montreal, Canada