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Company lists · Data refreshed September 2026

Top 21 B2B data marketplaces based in London, United Kingdom

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 65 companies tracked

RevenueBase identified 65 B2B data marketplaces headquartered in London, United Kingdom as of September 2026 and tracks 2,425 professional contacts across them, including 319 with verified work emails and 119 with mobile numbers. London is the largest hub.

This list covers B2B data marketplaces 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review
65Companies
2,425Contacts tracked
319Verified emails
119Mobile numbers
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The 21 largest B2B data marketplaces based in London, United Kingdom

Ranked by team size
Top 21 of 65 B2B data marketplaces based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names B2B data marketplaces: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
Mobius Knowledge ServicesPartial evidence
London, United Kingdom501-1,0001,434

“Mobius transforms the way data works for you.”

Source: company website · checked Sep 3, 2026
2
Vereigen MediaStrong evidence
London, United Kingdom201-500302

“Vereigen Media is a U.S-based B2B demand generation company that supports organizations connect with data-driven lead generation and audience engagement solutions.”

Source: company website · checked Sep 3, 2026
RevenueBasePublisher of this directory
Boston, MA, United Statesn/aTry free

“RevenueBase is a B2B contact data platform. This directory is built from its company graph.”

3
QogitaPartial evidence
London, United Kingdom51-200187

“Qogita is a leading global wholesale B2B platform that offers a wide variety of products, brands and categories across geographies.”

Source: company website · checked Sep 3, 2026
4
NeudataPartial evidence
London, United Kingdom51-20099

“The authoritative source for global data intelligence Neudata provides actionable, unbiased market intelligence to buyers and sellers of market and alternative data.”

Source: company website · checked Sep 3, 2026
5
Harbr DataStrong evidence
London, United Kingdom51-20042

“Harbr is an award-winning provider of data marketplaces and storefronts accelerating governed discovery, access, and use of data and AI products.”

Source: company website · checked Sep 3, 2026
6
EI Global B2B Marketing IntelligencePartial evidence
London, United Kingdom11-5042

“Ei Advisory provides B2B sales and marketing intelligence that helps companies reach, engage and convert customers.”

Source: company website · checked Sep 3, 2026
7
Custom IntelligencePartial evidence
London, United Kingdom11-5023

“Custom Intelligence are a Global B2B Demand Generation expert with over 20 years of B2B marketing expertise.”

Source: company website · checked Sep 3, 2026
8
Thinkdata WorksPartial evidence
London, United Kingdom51-20014

“Data is more available and more diverse than ever, but varied sources, inconsistent formats, and an evolving compliance landscape make it difficult to manage.”

Source: company website · checked Sep 3, 2026
9
RED VolcanoPartial evidence
London, United Kingdom1-1010

“Red Volcano provide a tailored service for automating the collection of business critical data We search, catalogue, view, and export millions of data points for our clients…”

Source: company website · checked Sep 3, 2026
10
IIRISStrong evidence
London, United Kingdom201-5009

“IIRIS is Informa's centralised data and analytics engine for all our B2B Markets customer data to capture opportunities from using data to enhance our existing products and…”

Source: company website · checked Sep 3, 2026
11
Demand StudioPartial evidence
London, United Kingdom51-2007

“Demand Studio is a B2B marketing services company with a highly experienced team and 250+ operational resources worldwide.”

Source: company website · checked Sep 3, 2026
12
DoordaPartial evidence
London, United Kingdom11-507

“Doorda provide trusted data, on demand, which allows organisations to drive unique competitive advantage by accelerating insight and innovation.”

Source: company website · checked Sep 3, 2026
13
Work With DataPartial evidence
London, United Kingdom1-105

“We're on a mission to democratize data by creating a common source accessible to everyone.”

Source: company website · checked Sep 3, 2026
14
Streamline OnlinePartial evidence
London, United Kingdom1-104

“Welcome to Streamline, the UK's premier B2B platform, revolutionising business connections.”

Source: company website · checked Sep 3, 2026
15
Intentify DemandPartial evidence
London, United Kingdom11-503

“Intentify Demand is a provider of demand and lead generation services, specialising in B2B sectors such as SaaS, IT technology, FinTech, Martech and HR Tech.”

Source: company website · checked Sep 3, 2026
16
BizvibeIndirect evidence
London, United Kingdom51-2003

“BizVibe is a business intellgience platform that helps buyers and sellers quickly discover and connect with the right companies.”

Source: company website · checked Sep 3, 2026
17
acquisition.aiIndirect evidence
London, United Kingdom1-102

“A world-class analytics agency.”

Source: company website · checked Sep 3, 2026
18
PRAVIPartial evidence
London, United Kingdom1-102

“Powerful data tools have always belonged to large organisations with big budgets and specialist teams.”

Source: company website · checked Sep 3, 2026
19
DataruIndirect evidence
London, United Kingdom11-502

“What is Dataru?”

Source: company website · checked Sep 3, 2026
20
QuestoPartial evidence
London, United Kingdom1-102

“Questo.work is the leading global platform for Data and Analytics freelancers and clients.”

Source: company website · checked Sep 3, 2026
21
OmnifiaPartial evidence
London, United Kingdom1-101

“Omnifia is the first and only business intelligence tool designed specifically for B2B marketing teams in high-growth startups.”

Source: company website · checked Sep 3, 2026

Showing 21 of 65 B2B data marketplaces based in London, United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 319 reachable decision-makers.

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B2B data marketplaces based in London, United Kingdom at a glance

As of Sep 3, 2026
11-50Median size (employees)
LondonLargest hub · 65 HQs
119Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
32
11-50
16
51-200
8
201-500
8
501-1,000
1

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 marketplaces, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “B2B data marketplaces”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among B2B data marketplaces, 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 an evidence 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, 319 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 3, 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 marketplaces by metro in the United Kingdom

  • B2B data marketplaces in London65

Frequently asked

How many B2B data marketplaces are there based in London, United Kingdom?

RevenueBase identified 65 B2B data marketplaces 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?

Mobius Knowledge Services, headquartered in London, tops this list with the largest team on record.

Which city has the most B2B data marketplaces?

London leads with 65 headquartered companies, followed by Manchester (4) and Cambridge (2).

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 319 verified decision-maker contacts tracked across these 65 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 3, 2026.

Ready to reach these companies? Verified emails and direct dials for all 65 B2B data marketplaces based in London, United Kingdom. Start with a free account, no credit card.

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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 SmartSearch, 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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