Company lists · Data refreshed September 2026

Top 25 First-party data platform developers based in the United Kingdom

Name: First-party data platform developers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 88 companies tracked

RevenueBase identified 88 first-party data platform developers headquartered in the United Kingdom as of September 2026 and tracks 1,241 professional contacts across them, including 539 with verified work emails. London is the largest hub.

This list covers first-party data platform developers 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 28, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

88Companies

1,241Contacts tracked

539Verified emails

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The 25 largest first-party data platform developers based in the United Kingdom

Ranked by team size

Top 25 of 88 first-party data platform developers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to first-party data platform developers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	OUTRA	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	n/a	189 contacts →
	Partial evidence “Outra provides the audience data that household names like Sky, Shell, Zoopla and AXA rely on to power their campaigns.” Source: RevenueBase Database · checked Sep 28, 2026
2	Celebrus	Indirect evidence	Sunbury-on-thames, United KingdomHQ checked Sep 28, 2026	51-200	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 28, 2026
3	Silverbullet	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	57 contacts →
	Partial evidence “Silverbullet is a leading Data-Driven Customer Experience (CX) Company that empowers the world's leading brands to better understand the data they collect, store, and activate to…” Source: RevenueBase Database · checked Sep 28, 2026
4	PLINC	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	55 contacts →
	Strong evidence “Plinc helps brands turn first-party data into competitive advantage.” Source: RevenueBase Database · checked Sep 28, 2026
5	Countly	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	41 contacts →
	Strong evidence “Countly is a first-party digital analytics and customer engagement platform that gives organizations complete ownership of their data and product intelligence - across every…” Source: RevenueBase Database · checked Sep 28, 2026
6	Rapier AI Analytics	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	39 contacts →
	Strong evidence “We are Rapier, a leading AI customer growth platform with a strong focus on transforming first-party customer data into business growth.” Source: RevenueBase Database · checked Sep 28, 2026
7	Leadscale Group	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	34 contacts →
	Partial evidence “LeadScale provides the greatest leverage to any business – the ability to use personal data to identify more opportunities earlier, driving revenue at scale.” Source: RevenueBase Database · checked Sep 28, 2026
8	Acxiom UK	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	34 contacts →
	Partial evidence “Acxiom puts data to work, solving complex challenges for the world’s leading brands and agencies.” Source: RevenueBase Database · checked Sep 28, 2026
9	Measure Protocol	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	22 contacts →
	Partial evidence “Measure Protocol is a behavioral data company built on real consumer behavior.” Source: RevenueBase Database · checked Sep 28, 2026
10	Covatic	Indirect evidence	Birmingham, United KingdomHQ checked Sep 28, 2026	11-50	21 contacts →
	Indirect evidence “Covatic (pronounced "Co-Va-Tick") provides the essential infrastructure for a fully connected universe, enabling media companies and advertisers to Segment, Activate and Attribute…” Source: RevenueBase Database · checked Sep 28, 2026
11	Onaudience	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	20 contacts →
	Partial evidence “OnAudience is one of the world’s largest audience data providers.” Source: RevenueBase Database · checked Sep 28, 2026
12	Search Machines	Indirect evidence	Penzance, United KingdomHQ checked Sep 28, 2026	11-50	19 contacts →
	Indirect evidence “At Search Machines we transform businesses by optimizing customer acquisition through science and technology.” Source: RevenueBase Database · checked Sep 28, 2026
13	Zzgtech	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Indirect evidence “ZZGTech builds secure and scalable infrastructure for modern marketing and customer communication.” Source: RevenueBase Database · checked Sep 28, 2026
14	Audiencerate	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Strong evidence “Audiencerate is the Marketing Data Platform that helps agencies, brands, and public organizations turn fragmented data into precise audiences and activate them across every…” Source: RevenueBase Database · checked Sep 28, 2026
15	Anonymised	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Strong evidence “Anonymised is a data platform using AI to drive incremental outcomes for advertisers.” Source: RevenueBase Database · checked Sep 28, 2026
16	Sweet Analytics	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	14 contacts →
	Partial evidence “Sweet Analytics, at the centre of all your data.” Source: RevenueBase Database · checked Sep 28, 2026
17	Ruler Analytics	Partial evidence	Liverpool, United KingdomHQ checked Sep 28, 2026	11-50	14 contacts →
	Partial evidence “Ruler Analytics is a marketing attribution and measurement platform that combines multi-touch attribution, marketing mix modelling and user journey reporting, to give marketers…” Source: RevenueBase Database · checked Sep 28, 2026
18	Measurelab	Partial evidence	Brighton, United KingdomHQ checked Sep 28, 2026	11-50	13 contacts →
	Partial evidence “Measurelab enables marketing and analytics teams to trust their data and use it to drive measurable growth.” Source: RevenueBase Database · checked Sep 28, 2026
19	Audiences	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	12 contacts →
	Partial evidence “AUDIENCES is the pioneer of in-cloud data activation.” Source: RevenueBase Database · checked Sep 28, 2026
20	RAIS	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	11 contacts →
	Indirect evidence “We help D2C brands grow the value of their customers faster by providing software, intelligence and expertise.” Source: RevenueBase Database · checked Sep 28, 2026
21	Bright Analytics	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	10 contacts →
	Strong evidence “Bright Analytics is a modern data analysis and data-visualisation platform focused on Marketing and Business Performance, that can be deployed as an end-to-end solution or on a…” Source: RevenueBase Database · checked Sep 28, 2026
22	IIRIS	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	9 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
23	Marketing Town	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	9 contacts →
	Indirect evidence “We are in the midst of a shift in business models, powered by the modern SaaS economy, developments in technology and digitalisation of consumer behaviour.” Source: RevenueBase Database · checked Sep 28, 2026
24	Evorra	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	8 contacts →
	Partial evidence “Evorra seeks to make every marketer in the world, a responsible, data-driven marketer.” Source: RevenueBase Database · checked Sep 28, 2026
25	Hive Marketing Cloud	Indirect evidence	Bristol, United KingdomHQ checked Sep 28, 2026	11-50	8 contacts →
	Indirect evidence “Taking people on journeys they love.” Source: RevenueBase Database · checked Sep 28, 2026

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: first-party data platform developers. 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 first-party data platform developers.
Partial evidence: Its own public description names part of first-party data platform developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name first-party data platform developers. 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 88 first-party data platform developers based in the United Kingdom

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First-party data platform developers based in the United Kingdom at a glance

As of Sep 28, 2026

43.4%Verified-email coverage

14.1Average contacts per company

11-50Median size (employees)

64.8%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 88 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 first-party data platform developers, 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 “first-party data platform developers”. 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 first-party data platform developers), 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 first-party data platform developers, 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, 539 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 28, 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.

First-party data platform developers by metro

First-party data platform developers in London57

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 first-party data platform developers, 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 first-party data platform developers are there based in the United Kingdom?

RevenueBase identified 88 first-party data platform developers 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?

OUTRA, headquartered in London, tops this list with the largest team on record.

Which city has the most first-party data platform developers?

London leads with 57 headquartered companies, followed by Manchester (2) and Abingdon (1).

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 539 verified decision-maker contacts tracked across these 88 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 28, 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.