Company lists · Data refreshed September 2026

Top 25 Marketing data services worldwide

Name: Marketing data services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 19,818 companies tracked

RevenueBase identified 19,818 marketing data services worldwide as of September 2026 and tracks 229,793 professional contacts across them, including 63,340 with verified work emails. The United States is the largest market and London the largest hub.

This list covers marketing data services 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 21, 2026. Country and city lists for marketing data services 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 21, 2026 86% judged on-target in blind review

19,818Companies

229,793Contacts tracked

63,340Verified emails

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The 25 largest marketing data services worldwide

Ranked by team size

Top 25 of 19,818 marketing data services worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to marketing data services: 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	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	10001+	15,564 contacts →
	Strong evidence “Kantar is the world’s leading marketing data and analytics business.” Source: RevenueBase Database · checked Sep 21, 2026
2	Epsilon	Strong evidence	Irving, TX, United StatesHQ checked Sep 21, 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 21, 2026
3	Zoominfo	Indirect evidence	Vancouver, WA, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,029 contacts →
	Indirect evidence “ZoomInfo (NASDAQ: GTM) is the go-to-market platform that helps businesses find, acquire and grow their customers.” Source: RevenueBase Database · checked Sep 21, 2026
4	Dynata	Partial evidence	Westport, CT, United StatesHQ checked Sep 21, 2026	5,001-10,000	3,807 contacts →
	Partial 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 21, 2026
5	Acxiom	Partial evidence	Conway, AR, United StatesHQ checked Sep 21, 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 21, 2026
6	Kinesso	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	5,001-10,000	2,860 contacts →
	Partial evidence “KINESSO is the technology-driven performance marketing agency within Omnicom Media that provides actionable growth for both agency partners and clients.” Source: RevenueBase Database · checked Sep 21, 2026
7	Numerator	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	5,001-10,000	2,633 contacts →
	Partial evidence “Numerator is a data and tech company bringing speed and scale to market research.” Source: RevenueBase Database · checked Sep 21, 2026
8	Caci LTD	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	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, 2026
9	Power Digital Marketing	Partial evidence	San Diego, CA, United StatesHQ checked Sep 21, 2026	501-1,000	1,570 contacts →
	Partial evidence “Power Digital is a growth marketing firm fueled by technology and driven by a talented team of consultative marketers, creatives, analysts and technologists.” Source: RevenueBase Database · checked Sep 21, 2026
10	Intuit Mailchimp	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,483 contacts →
	Partial evidence “The Mailchimpossibilities are endless when you create, automate, and optimize your marketing with Mailchimp.” Source: RevenueBase Database · checked Sep 21, 2026
11	Hearts & Science	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,359 contacts →
	Partial evidence “Hearts & Science, an Omnicom Media Group agency, transforms data signals into meaningful connections between brands and consumers that drive exponential growth.” Source: RevenueBase Database · checked Sep 21, 2026
12	Similarweb	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,351 contacts →
	Partial evidence “We power businesses with the best digital data.” Source: RevenueBase Database · checked Sep 21, 2026
13	Annalect	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	5,001-10,000	1,327 contacts →
	Strong evidence “Over a decade ago, Omnicom created Annalect to reimagine the future of marketing, at the crossroads of data, tech, analytics, and AI.” Source: RevenueBase Database · checked Sep 21, 2026
14	J.D. Power	Indirect evidence	Troy, MI, United StatesHQ checked Sep 21, 2026	501-1,000	1,200 contacts →
	Indirect evidence “J.D.” Source: RevenueBase Database · checked Sep 21, 2026
15	Data Axle	Partial evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,088 contacts →
	Partial evidence “Data Axle helps clients create a foundation of clean data, find new leads, develop winning strategies, design beautiful campaigns, and can handle all day-to-day execution needs” Source: RevenueBase Database · checked Sep 21, 2026
16	Demandscience	Partial evidence	Boston, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,087 contacts →
	Partial evidence “With proprietary data and omni-channel activation like events, content, programmatic and chat, we cut through the noise to reach entire buyer groups, driving engagement and impact…” Source: RevenueBase Database · checked Sep 21, 2026
17	MMA Marketing Management Analytics	Partial evidence	Norwalk, CT, United StatesHQ checked Sep 21, 2026	201-500	999 contacts →
	Partial evidence “Ipsos MMA is committed to enabling our clients to achieve significant brand and marketplace advantages by synergistically leveraging unified marketing & commercial measurement and…” Source: RevenueBase Database · checked Sep 21, 2026
18	SEM	Partial evidence	Sariyer, TürkiyeHQ checked Sep 21, 2026	n/a	883 contacts →
	Partial evidence “SEM is a global new generation consumer marketing and technologies brand where we combine growth consultancy, advanced analytics, digital marketing and technology services under…” Source: RevenueBase Database · checked Sep 21, 2026
19	NP Digital	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	866 contacts →
	Indirect evidence “Neil Patel has been recognized by the Wall Street Journal, Forbes, and the United Nations, to name a few, as one of the most influential and successful marketers and entrepreneurs…” Source: RevenueBase Database · checked Sep 21, 2026
20	IVE Group	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1,001-5,000	860 contacts →
	Partial evidence “IVE Group is Australia’s largest diversified marketing company.” Source: RevenueBase Database · checked Sep 21, 2026
21	CLAY	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	842 contacts →
	Indirect evidence “Build systems to grow revenue” Source: RevenueBase Database · checked Sep 21, 2026
22	Onemagnify	Indirect evidence	Detroit, MI, United StatesHQ checked Sep 21, 2026	501-1,000	824 contacts →
	Indirect evidence “At OneMagnify, we help transformational brands turn insight into action.” Source: RevenueBase Database · checked Sep 21, 2026
23	Manlitics B2B Ites	Partial evidence	New York, United StatesHQ checked Sep 21, 2026	501-1,000	750 contacts →
	Partial evidence “In an ERA of new and emerging digital mediums, we align our core expertise of today’s ever-changing technology with a clear understanding of traditional marketing methods without…” Source: RevenueBase Database · checked Sep 21, 2026
24	Anteriad	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	740 contacts →
	Partial evidence “Data Driven.” Source: RevenueBase Database · checked Sep 21, 2026
25	Ipsos In Romania	Indirect evidence	Bucharest, RomaniaHQ checked Sep 21, 2026	1,001-5,000	694 contacts →
	Indirect evidence “In our world of rapid change, the need for reliable information to make confident decisions has never been greater.” Source: RevenueBase Database · checked Sep 21, 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: marketing data services. 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 marketing data services.
Partial evidence: Its own public description names part of marketing data services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marketing data services. 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 19,818 marketing data services worldwide

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Marketing data services worldwide at a glance

As of Sep 21, 2026

27.6%Verified-email coverage

11.6Average contacts per company

1-10Median size (employees)

2.1%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

12,639

11-50

5,458

51-200

1,246

201-500

289

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 marketing data services, 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 marketing data services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “marketing data services”. 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 marketing data services), 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 marketing data services, 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, 63,340 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.

Marketing data services by location

99 lists · largest first

Every Marketing data services 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 marketing data services, 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 marketing data services are there worldwide?

RevenueBase identified 19,818 marketing data services 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 marketing data services?

The United States leads with 5,213 companies, followed by India (2,005) and the United Kingdom (1,080). Every marketing data services list by country and city is linked on this page.

Which city has the most marketing data services?

London leads with 425 headquartered companies, followed by New York (284) and Sao Paulo (239).

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 63,340 verified decision-maker contacts tracked across these 19,818 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.

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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.