Company lists · Data refreshed September 2026

Top 25 First-party data platform companies worldwide

Name: First-party data platform companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 2,018 companies tracked

RevenueBase identified 2,018 first-party data platform companies worldwide as of September 2026 and tracks 76,316 professional contacts across them, including 31,378 with verified work emails. The United States is the largest market and London the largest hub.

This list covers first-party data platform companies worldwide, 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. Country and city lists for first-party data platform companies follow the table.

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

2,018Companies

76,316Contacts tracked

31,378Verified emails

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The 25 largest first-party data platform companies worldwide

Ranked by team size

Top 25 of 2,018 first-party data platform companies worldwide, 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 companies: 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	Kantar	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	10001+	15,564 contacts →
	Partial evidence “Kantar is the world’s leading marketing data and analytics business.” Source: RevenueBase Database · checked Sep 28, 2026
2	Epsilon	Strong evidence	Irving, TX, United StatesHQ checked Sep 28, 2026	5,001-10,000	9,953 contacts →
	Strong evidence “Epsilon is a global leader in data and identity with deep expertise in digital media, clean rooms, customer data platforms, loyalty and marketing services.” Source: RevenueBase Database · checked Sep 28, 2026
3	Dynata	Strong evidence	Westport, CT, United StatesHQ checked Sep 28, 2026	5,001-10,000	3,807 contacts →
	Strong evidence “At Dynata, we deliver the highest quality first-party data to help businesses around the world gain precise insights, activate the right audiences, and confidently measure impact.” Source: RevenueBase Database · checked Sep 28, 2026
4	Acxiom	Partial evidence	Conway, AR, United StatesHQ checked Sep 28, 2026	1,001-5,000	3,241 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
5	Zeta Global	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,595 contacts →
	Indirect evidence “At Zeta Global (NYSE: ZETA), we help enterprise brands and agencies Achieve the Impossible™ with superintelligent marketing.” Source: RevenueBase Database · checked Sep 28, 2026
6	IRI	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,700 contacts →
	Partial evidence “IRI is a leading provider of big data, predictive analytics and forward-looking insights that help CPG, OTC healthcare, retailers and media companies to grow their businesses.” Source: RevenueBase Database · checked Sep 28, 2026
7	Appsflyer	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,516 contacts →
	Partial evidence “AppsFlyer is the Modern Marketing Cloud that helps businesses transform complex data into clarity and growth.” Source: RevenueBase Database · checked Sep 28, 2026
8	Liveramp	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,435 contacts →
	Strong evidence “LiveRamp is the data collaboration platform for the world’s most innovative companies.” Source: RevenueBase Database · checked Sep 28, 2026
9	Similarweb	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,351 contacts →
	Partial evidence “We power businesses with the best digital data.” Source: RevenueBase Database · checked Sep 28, 2026
10	Insider	Strong evidence	Istanbul, TürkiyeHQ checked Sep 28, 2026	1,001-5,000	1,036 contacts →
	Strong evidence “Insider-one platform for individualized, cross-channel experiences-enables enterprise marketers to connect customer data across channels and systems, predict their future behavior…” Source: RevenueBase Database · checked Sep 28, 2026
11	PIANO	Partial evidence	Amsterdam, NetherlandsHQ checked Sep 28, 2026	501-1,000	603 contacts →
	Partial evidence “Piano is the digital analytics and subscription management platform that empowers businesses to understand their audience, orchestrate journeys, and grow revenue.” Source: RevenueBase Database · checked Sep 28, 2026
12	Tealium	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	501-1,000	588 contacts →
	Partial evidence “Tealium helps companies collect, govern, and enrich their customer data in real-time to power AI initiatives and delight customers in the moments that matter.” Source: RevenueBase Database · checked Sep 28, 2026
13	Prodege, LLC	Partial evidence	El Segundo, CA, United StatesHQ checked Sep 28, 2026	501-1,000	559 contacts →
	Partial evidence “A cutting-edge marketing and consumer insights platform, Prodege has charted a course of innovation in the evolving technology landscape by helping leading brands, marketers, and…” Source: RevenueBase Database · checked Sep 28, 2026
14	Analytic Partners	Indirect evidence	Miami, FL, United StatesHQ checked Sep 28, 2026	501-1,000	558 contacts →
	Indirect evidence “Analytic Partners is the leader in Commercial Analytics.” Source: RevenueBase Database · checked Sep 28, 2026
15	Wunderkind	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	521 contacts →
	Indirect evidence “Wunderkind is pioneering a new category of AI agentic marketing decisioning, where identity meets AI to drive scalable performance across channel.” Source: RevenueBase Database · checked Sep 28, 2026
16	Fullstory	Strong evidence	Atlanta, GA, United StatesHQ checked Sep 28, 2026	501-1,000	513 contacts →
	Strong evidence “Fullstory’s behavioral data platform helps technology leaders make better, more informed decisions.” Source: RevenueBase Database · checked Sep 28, 2026
17	Quantcast	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	501-1,000	491 contacts →
	Partial evidence “Quantcast is the AI-powered ad platform built for performance marketers.” Source: RevenueBase Database · checked Sep 28, 2026
18	Infogroup	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	476 contacts →
	Partial evidence “Infogroup is a big data, analytics, and marketing services provider that delivers best in class data-driven customer-centric technology solutions.” Source: RevenueBase Database · checked Sep 28, 2026
19	Numberly	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	501-1,000	474 contacts →
	Partial evidence “Numberly, Marketing Technologist, is a major player in the field of data marketing.” Source: RevenueBase Database · checked Sep 28, 2026
20	Quantum Metric	Partial evidence	Colorado Springs, CO, United StatesHQ checked Sep 28, 2026	501-1,000	456 contacts →
	Partial evidence “Quantum Metric is the customer-centered digital analytics platform for today’s leading organizations.” Source: RevenueBase Database · checked Sep 28, 2026
21	Supermetrics	Partial evidence	Helsinki, FinlandHQ checked Sep 28, 2026	201-500	426 contacts →
	Partial evidence “Marketing data, wherever you need it.” Source: RevenueBase Database · checked Sep 28, 2026
22	Cardlytics	Strong evidence	Atlanta, GA, United StatesHQ checked Sep 28, 2026	501-1,000	417 contacts →
	Strong evidence “Cardlytics (NASDAQ: CDLX) is a commerce media platform, powered by our publishers’ first-party purchase data, that makes commerce smarter and more rewarding for everyone.” Source: RevenueBase Database · checked Sep 28, 2026
23	Webengage	Strong evidence	Mumbai, IndiaHQ checked Sep 28, 2026	201-500	404 contacts →
	Strong evidence “WebEngage is an advanced Customer Data and Engagement Platform helping consumer brands achieve higher lifetime value and marketing ROI through personalized experiences at scale.” Source: RevenueBase Database · checked Sep 28, 2026
24	Funnel	Partial evidence	Stockholm, SwedenHQ checked Sep 28, 2026	201-500	380 contacts →
	Partial evidence “The global marketing intelligence leader, Funnel helps thousands of marketers at brands like Havas Media, Home Depot and Publicis to choreograph their data and unlock insights…” Source: RevenueBase Database · checked Sep 28, 2026
25	Resulticks	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	201-500	375 contacts →
	Indirect evidence “Resulticks is a fully integrated, real-time audience engagement solution designed to help brands worldwide reach, acquire, and retain satised customers.” 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 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 first-party data platform companies.
Partial evidence: Its own public description names part of first-party data platform companies, 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 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 2,018 first-party data platform companies worldwide

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First-party data platform companies worldwide at a glance

As of Sep 28, 2026

41.1%Verified-email coverage

37.8Average contacts per company

1-10Median size (employees)

4.9%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,020

11-50

673

51-200

241

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 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.
Coverage: Every country. Country and city lists for first-party data platform companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “first-party data platform 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 first-party data platform 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 first-party data platform companies, and records with no verified work email.
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, 31,378 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 companies by location

15 lists · largest first

Every First-party data platform companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 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 first-party data platform companies are there worldwide?

RevenueBase identified 2,018 first-party data platform companies worldwide 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?

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

Which country has the most first-party data platform companies?

The United States leads with 637 companies, followed by the United Kingdom (151) and India (97). Every first-party data platform companies list by country and city is linked on this page.

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

London leads with 99 headquartered companies, followed by New York (81) and San Francisco (51).

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 31,378 verified decision-maker contacts tracked across these 2,018 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.