Company lists · Data refreshed September 2026
Top 25 B2B data providers based in the United Kingdom
RevenueBase identified 402 B2B data providers headquartered in the United Kingdom as of September 2026 and tracks 6,796 professional contacts across them, including 2,345 with verified work emails. London is the largest hub.
This list covers B2B data providers 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 14, 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 B2B data providers based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 14, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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 14, 2026Thanks. The Data Team will review it. | |||||
| Try free | |||||
Not rated “RevenueBase is a B2B contact data platform. This directory is built from its company graph.” | |||||
| 3 | 530 contacts → | ||||
Strong evidence “Cognism provides accurate, compliant-first B2B data and sales intelligence for teams growing across Europe and beyond.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 4 | 440 contacts → | ||||
Partial evidence “We are an award winning multilingual lead generation and market research service provider for B2B publishing, marketing, events and tech companies.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 5 | 162 contacts → | ||||
Indirect evidence “Supercharge Your Success with InFynd!” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 6 | 119 contacts → | ||||
Indirect evidence “GCL, with its unique, non-scripted approach to telemarketing and related marketing services, has for over 30 years established an enviable reputation for providing winning lead…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 7 | 116 contacts → | ||||
Partial evidence “Since 2016, Air Marketing has been the trusted outsourced sales and lead generation agency in the UK for ambitious B2B businesses.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 8 | 88 contacts → | ||||
Partial evidence “The B2B Customer Acquisition Specialists Internal Results specialize in generating leads, promoting content, and driving brand awareness for B2B organizations worldwide through…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 9 | 79 contacts → | ||||
Strong evidence “With 26+ years of experience and more than 500+ professionals, Cognition empowers growth for B2B organizations by delivering reliable data, intelligence, and actionable insights…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 10 | 47 contacts → | ||||
Partial evidence “Emailmovers are expert B2B email marketers, helping businesses unlock the full potential of email through targeted, high-performing campaigns.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 11 | 45 contacts → | ||||
Partial evidence “Advance Connects are a B2B telemarketing, lead generation & appointment scheduling experts, operating within various sectors including construction, built environment, industrial…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 12 | 44 contacts → | ||||
Partial evidence “With over three decades of experience, we partner with B2B sales and marketing teams to drive and nurture new customer acquisition - securing conversations with the right…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 13 | 43 contacts → | ||||
Partial evidence “Beanstalk is an integrated B2B Telemarketing and Lead Generation agency dedicated to helping our customers win new business.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 14 | 43 contacts → | ||||
Partial evidence “B2B and B2C outsourced Telemarketing agency.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 15 | 42 contacts → | ||||
Partial evidence “Ei Advisory provides B2B sales and marketing intelligence that helps companies reach, engage and convert customers.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 16 | 38 contacts → | ||||
Indirect evidence “It’s simple.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 17 | 38 contacts → | ||||
Indirect evidence “We are an ambitious and agile lead generation business, who exist to genuinely accelerate your growth!” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 18 | 36 contacts → | ||||
Partial evidence “Better insights Better contact data Better results.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 19 | 35 contacts → | ||||
Partial evidence “1 Stop Data offers the best of breed Marketing, Lead Generation and Call Centre services.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 20 | 34 contacts → | ||||
Strong evidence “Corpdata is a market leader in direct marketing data, serving the growing need for up-to-date B2B information and in depth database analysis.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 21 | 33 contacts → | ||||
Strong evidence “Market Location has been building the UK's most accurate B2B data universe for over 50 years.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 22 | 31 contacts → | ||||
Indirect evidence “IT Focus Telemarketing Ltd is an agency that specialises in working with information technology companies.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 23 | 30 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 24 | 28 contacts → | ||||
Indirect evidence “Thank you for visiting us, we’re glad you came.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 25 | 28 contacts → | ||||
Partial evidence “Xsell is a global B2B Digital Marketing & Lead Generation Company, specialising in the Information Technology, IT Security & Software Sectors.” Source: RevenueBase Database · checked Sep 14, 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: B2B data providers. 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 B2B data providers.
- Partial evidence
- Its own public description names part of B2B data providers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name B2B data providers. 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 402 B2B data providers based in the United Kingdom
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B2B data providers based in the United Kingdom at a glance
As of Sep 14, 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 402 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 B2B data providers, 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 “B2B data providers”. 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 B2B data providers), 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 B2B data providers, 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, 2,345 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 14, 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.
B2B data providers by metro
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 B2B data providers, 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 B2B data providers are there based in the United Kingdom?
RevenueBase identified 402 B2B data providers 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 B2B data providers?
London leads with 116 headquartered companies, followed by Manchester (14) and Birmingham (9).
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 2,345 verified decision-maker contacts tracked across these 402 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 14, 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.