Company lists · Data refreshed September 2026

Top 25 Advertising research firms worldwide

Name: Advertising research firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 2,130 companies tracked

RevenueBase identified 2,130 advertising research firms worldwide as of September 2026 and tracks 27,576 professional contacts across them, including 5,418 with verified work emails. The United States is the largest market and London the largest hub.

This list covers advertising research firms 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 19, 2026. Country and city lists for advertising research firms 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 19, 2026 86% judged on-target in blind review

2,130Companies

27,576Contacts tracked

5,418Verified emails

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The 25 largest advertising research firms worldwide

Ranked by team size

Top 25 of 2,130 advertising research firms worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to advertising research firms: 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 Media	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,306 contacts →
	Indirect evidence “Kantar Media is now Fifty5Blue.” Source: RevenueBase Database · checked Sep 19, 2026
2	Hansa Research Group	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	501-1,000	741 contacts →
	Partial evidence “Hansa Research is a full-service global market research agency conducting research in over 100 countries.” Source: RevenueBase Database · checked Sep 19, 2026
3	TAM Media Research Pvt. LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	501-1,000	669 contacts →
	Partial evidence “TAM Media Research, is a 50:50 joint venture between two global media research organizations, Nielsen & Kantar Media Research.” Source: RevenueBase Database · checked Sep 19, 2026
4	Market Xcel	Indirect evidence	New Delhi, IndiaHQ checked Sep 19, 2026	501-1,000	664 contacts →
	Indirect evidence “At Market Xcel, we're dedicated to delivering high-quality results for our clients.” Source: RevenueBase Database · checked Sep 19, 2026
5	Ebiquity PLC	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	625 contacts →
	Indirect evidence “Ebiquity is the independent authority in Marketing Effectiveness.” Source: RevenueBase Database · checked Sep 19, 2026
6	Pt. The Nielsen Company Indonesia	Indirect evidence	IndonesiaHQ checked Sep 19, 2026	10001+	551 contacts →
	Indirect evidence “Nielsen is a global performance management company that provides a comprehensive understanding of what consumers Watch and Buy.” Source: RevenueBase Database · checked Sep 19, 2026
7	MSM	Indirect evidence	Clichy, FranceHQ checked Sep 19, 2026	n/a	416 contacts →
	Indirect evidence “June marketing est une agence marketing multi-expertises à forte culture « consumer-centric », issue de la fusion de MSM, Cubes et New Moon.” Source: RevenueBase Database · checked Sep 19, 2026
8	Excelsior Research	Partial evidence	Pune, IndiaHQ checked Sep 19, 2026	201-500	253 contacts →
	Partial evidence “Excelsior Research is a full service market research agency offering a wide range of Research Solutions and Services.” Source: RevenueBase Database · checked Sep 19, 2026
9	Markelytics Solutions	Indirect evidence	Bangalore, IndiaHQ checked Sep 19, 2026	501-1,000	247 contacts →
	Indirect evidence “Markelytics Solutions Ltd.” Source: RevenueBase Database · checked Sep 19, 2026
10	Starlight Analytics	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	n/a	231 contacts →
	Indirect evidence “Smarter Insights for Sustainable Brand Growth Navigate your market with confidence.” Source: RevenueBase Database · checked Sep 19, 2026
11	Blackstone Group	Partial evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	51-200	229 contacts →
	Partial evidence “Blackstone Group is a full-service custom marketing research and consulting firm providing clients with actionable insights for over 25 years.” Source: RevenueBase Database · checked Sep 19, 2026
12	Magna Global	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	10001+	218 contacts →
	Partial evidence “MAGNA is the media intelligence unit within IPG Mediabrands and the driving force behind advertising forecasts, understanding consumer behavior, marketplace insights, and…” Source: RevenueBase Database · checked Sep 19, 2026
13	Aeon Research	Partial evidence	Delhi, IndiaHQ checked Sep 19, 2026	1,001-5,000	202 contacts →
	Partial evidence “Aeon Market Research Pvt.” Source: RevenueBase Database · checked Sep 19, 2026
14	Gemius	Partial evidence	Warsaw, PolandHQ checked Sep 19, 2026	201-500	192 contacts →
	Partial evidence “We are an international research and technology company providing digital and cross-media audience measurement and advanced marketing solutions.” Source: RevenueBase Database · checked Sep 19, 2026
15	Rakuten Insight	Partial evidence	Setagaya-ku, JapanHQ checked Sep 19, 2026	201-500	187 contacts →
	Partial evidence “For over 25 years, Rakuten Insight has been at the forefront of consumer market research data collection.” Source: RevenueBase Database · checked Sep 19, 2026
16	Quadrant Strategies	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	179 contacts →
	Indirect evidence “Quadrant Strategies helps the world’s most prominent companies navigate their most important brand, reputation, and product challenges.” Source: RevenueBase Database · checked Sep 19, 2026
17	Vmak Research & Services, LLC	Partial evidence	Noida, IndiaHQ checked Sep 19, 2026	51-200	175 contacts →
	Partial evidence “Vmak Research & Services, LLC is a full service Market Research agency specializing in Technology spaces, Telecom, Consumer Products, Media and Healthcare.” Source: RevenueBase Database · checked Sep 19, 2026
18	DE LA Riva Group	Partial evidence	Mexico Df, MexicoHQ checked Sep 19, 2026	51-200	171 contacts →
	Partial evidence “De la Riva Group is one of the most trusted market research companies serving Fortune 500, private and government clients in North and South America.” Source: RevenueBase Database · checked Sep 19, 2026
19	Screen Engine ASI	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 19, 2026	201-500	170 contacts →
	Partial evidence “Screen Engine/ASI is a global market research and analytics firm passionate about what we do and hyper-focused on the success of our clients.” Source: RevenueBase Database · checked Sep 19, 2026
20	Eyesee	Strong evidence	Ghent, BelgiumHQ checked Sep 19, 2026	51-200	167 contacts →
	Strong evidence “EyeSee is a tech-enabled consumer research partner, providing highly predictive insights for shopper, advertising, innovation, and e-commerce optimization.” Source: RevenueBase Database · checked Sep 19, 2026
21	Activa Research	Partial evidence	Providencia, ChileHQ checked Sep 19, 2026	51-200	160 contacts →
	Partial evidence “ACTIVA RESEARCH es una empresa de Estudios de Mercado, formada por Profesionales de diversas disciplinas, que cuentan con una vasta experiencia en Investigación y Marketing y con…” Source: RevenueBase Database · checked Sep 19, 2026
22	Deka Insight	Partial evidence	Jakarta Selatan, IndonesiaHQ checked Sep 19, 2026	51-200	157 contacts →
	Partial evidence “The Fact of DEKA Marketing Research - In 1993 evolved to DEKA Marketing Research as an independent full-service marketing research agency - Now leading Independent Indonesian…” Source: RevenueBase Database · checked Sep 19, 2026
23	Advertising Research Foundation ARF	Strong evidence	New York, NY, United StatesHQ checked Sep 19, 2026	n/a	156 contacts →
	Strong evidence “The Advertising Research Foundation (ARF) is the only organization that creates and curates objective, original research through education, events, and networking for advertising…” Source: RevenueBase Database · checked Sep 19, 2026
24	Promark Research Corporation	Partial evidence	Spring, TX, United StatesHQ checked Sep 19, 2026	51-200	152 contacts →
	Partial evidence “Promark Research Corporation is headquartered in Spring, Texas, a few miles North of Houston.” Source: RevenueBase Database · checked Sep 19, 2026
25	Chrome Data Analytics And Media	Partial evidence	IndiaHQ checked Sep 19, 2026	1,001-5,000	148 contacts →
	Partial evidence “Chrome Data Analytics and Media provides primary market research and media services to help businesses make better decisions.” Source: RevenueBase Database · checked Sep 19, 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: advertising research firms. 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 advertising research firms.
Partial evidence: Its own public description names part of advertising research firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name advertising research firms. 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 2,130 advertising research firms worldwide

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Advertising research firms worldwide at a glance

As of Sep 19, 2026

19.6%Verified-email coverage

12.9Average contacts per company

1-10Median size (employees)

2.0%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

1,073

11-50

773

51-200

190

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 advertising research firms, 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 advertising research firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “advertising research firms”. 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 advertising research firms), 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 advertising research firms, 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, 5,418 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 19, 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.

Advertising research firms by location

11 lists · largest first

Every Advertising research firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 advertising research firms, 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 advertising research firms are there worldwide?

RevenueBase identified 2,130 advertising research firms 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 Media, headquartered in London, tops this list with the largest team on record.

Which country has the most advertising research firms?

The United States leads with 532 companies, followed by India (184) and the United Kingdom (106). Every advertising research firms list by country and city is linked on this page.

Which city has the most advertising research firms?

London leads with 42 headquartered companies, followed by New Delhi (39) and New York (34).

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 5,418 verified decision-maker contacts tracked across these 2,130 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 19, 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.