Company lists · Data refreshed September 2026

Top 25 Research agencies worldwide

RevenueBase identified 18,915 research agencies worldwide as of September 2026 and tracks 352,454 professional contacts across them, including 89,194 with verified work emails. The United States is the largest market and London the largest hub.

This list covers research agencies 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 research agencies 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
18,915Companies
352,454Contacts tracked
89,194Verified emails
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The 25 largest research agencies worldwide

Ranked by team size
Top 25 of 18,915 research agencies worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to research agencies: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceChicago, IL, United StatesHQ checked Sep 21, 202610001+25,856 contacts →

Indirect evidence

“NielsenIQ (NIQ) is the world’s leading consumer intelligence company, delivering the most complete understanding of consumer buying behavior and revealing new pathways to growth.”

Source: RevenueBase Database · checked Sep 21, 2026
2Indirect evidenceNew York, United StatesHQ checked Sep 21, 202610001+23,892 contacts →

Indirect evidence

“Nielsen shapes the world’s media and content as a global leader in audience insights, data and analytics.”

Source: RevenueBase Database · checked Sep 21, 2026
3Indirect evidenceParis, FranceHQ checked Sep 21, 202610001+16,377 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
4Indirect evidenceLondon, United KingdomHQ checked Sep 21, 20265,001-10,0005,986 contacts →

Indirect evidence

“Mindshare is a media services brand that accelerates Good Growth for its clients in the age of transformation.”

Source: RevenueBase Database · checked Sep 21, 2026
5Strong evidenceLondon, United KingdomHQ checked Sep 21, 20261,001-5,0004,637 contacts →

Strong evidence

“YouGov is a global research data and analytics group, powered by reality.”

Source: RevenueBase Database · checked Sep 21, 2026
6Indirect evidenceBethesda, MD, United StatesHQ checked Sep 21, 20261,001-5,0003,248 contacts →

Indirect evidence

“Westat offers innovative professional services to help clients improve outcomes in health, education, and social policy.”

Source: RevenueBase Database · checked Sep 21, 2026
7Indirect evidenceSao Paulo, BrazilHQ checked Sep 21, 20261,001-5,0002,973 contacts →

Indirect evidence

“O Ibope – marca latino-americana da Fifty5Blue – entrega clareza para marcas, agências e veículos sobre como as pessoas consomem mídia.”

Source: RevenueBase Database · checked Sep 21, 2026
8Strong evidenceChicago, IL, United StatesHQ checked Sep 21, 20265,001-10,0002,633 contacts →

Strong evidence

“Numerator is a data and tech company bringing speed and scale to market research.”

Source: RevenueBase Database · checked Sep 21, 2026
9Indirect evidenceLondon, United KingdomHQ checked Sep 21, 20261,001-5,0001,475 contacts →

Indirect evidence

“At Mintel, we empower businesses to navigate the future with confidence.”

Source: RevenueBase Database · checked Sep 21, 2026
10Indirect evidenceLondon, United KingdomHQ checked Sep 21, 20261,001-5,0001,306 contacts →

Indirect evidence

“Kantar Media is now Fifty5Blue.”

Source: RevenueBase Database · checked Sep 21, 2026
11Indirect evidenceReston, VA, United StatesHQ checked Sep 21, 20261,001-5,0001,269 contacts →

Indirect evidence

“Comscore (NASDAQ: SCOR) is a global, trusted partner for planning, transacting and evaluating media across platforms.”

Source: RevenueBase Database · checked Sep 21, 2026
12Strong evidenceHyderabad, IndiaHQ checked Sep 21, 20261,001-5,0001,260 contacts →

Strong evidence

“GD Research Center Pvt.”

Source: RevenueBase Database · checked Sep 21, 2026
13Indirect evidenceLivonia, MI, United StatesHQ checked Sep 21, 20261,001-5,0001,155 contacts →

Indirect evidence

“Welcome to Escalent.”

Source: RevenueBase Database · checked Sep 21, 2026
14Indirect evidenceSão Paulo, BrazilHQ checked Sep 21, 2026201-5001,010 contacts →

Indirect evidence

“A MAIORIA DOS MANIFESTOS DE AGÊNCIA FALA SOBRE O QUE SE ACREDITA.”

Source: RevenueBase Database · checked Sep 21, 2026
15Indirect evidenceCulver City, CA, United StatesHQ checked Sep 21, 2026n/a931 contacts →

Indirect evidence

“Interpret is a global consumer insights agency that helps companies at the intersection of media, technology, and entertainment.”

Source: RevenueBase Database · checked Sep 21, 2026
16Strong evidenceIselin, NJ, United StatesHQ checked Sep 21, 20261,001-5,000795 contacts →

Strong evidence

“Today’s markets demand new research methods.”

Source: RevenueBase Database · checked Sep 21, 2026
17Indirect evidenceLondon, United KingdomHQ checked Sep 21, 2026501-1,000785 contacts →

Indirect evidence

“WGSN is the global authority on consumer trend forecasting.”

Source: RevenueBase Database · checked Sep 21, 2026
18Strong evidenceShelton, CT, United StatesHQ checked Sep 21, 20261,001-5,000778 contacts →

Strong evidence

Research Now SSI is the global leader in digital research data for better insights and business decisions.”

Source: RevenueBase Database · checked Sep 21, 2026
19Strong evidenceStockholm, SwedenHQ checked Sep 21, 20261,001-5,000771 contacts →

Strong evidence

“Cint is the technology foundation for continuous research and measurement.”

Source: RevenueBase Database · checked Sep 21, 2026
20Indirect evidenceRockville, MD, United StatesHQ checked Sep 21, 2026n/a770 contacts →

Indirect evidence

“MMG is a full-service global health communications group that specializes in patient recruitment and retention.”

Source: RevenueBase Database · checked Sep 21, 2026
21Strong evidenceOslo, NorwayHQ checked Sep 21, 2026501-1,000764 contacts →

Strong evidence

“Norstat is one of the leading data collectors for market research and insight in Europe and the Americas.”

Source: RevenueBase Database · checked Sep 21, 2026
22Strong evidenceLondon, United KingdomHQ checked Sep 21, 2026501-1,000741 contacts →

Strong evidence

“Verian is a world leading research, evidence, evaluation, and communications agency, providing services to government and the public realm.”

Source: RevenueBase Database · checked Sep 21, 2026
23Strong evidenceMumbai, IndiaHQ checked Sep 21, 2026501-1,000741 contacts →

Strong evidence

“Hansa Research is a full-service global market research agency conducting research in over 100 countries.”

Source: RevenueBase Database · checked Sep 21, 2026
24Indirect evidenceKansas City, MO, United StatesHQ checked Sep 21, 2026201-500740 contacts →

Indirect evidence

“Six decades in retail taught us something most agencies never learn.”

Source: RevenueBase Database · checked Sep 21, 2026
25Indirect evidenceNew York, NY, United StatesHQ checked Sep 21, 2026501-1,000738 contacts →

Indirect evidence

“We’re on a mission to clarify the digital universe.”

Source: RevenueBase Database · checked Sep 21, 2026

Showing 25 of 18,915 research agencies worldwide

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Research agencies worldwide at a glance

As of Sep 21, 2026
25.3%Verified-email coverage
18.6Average contacts per company
1-10Median size (employees)
3.8%Largest-city concentration · London
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
10,073
11-50
6,227
51-200
1,856
201-500
439
501-1,000
129
1,001-5,000
89
5,001-10,000
13
10001+
51

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 research agencies, 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 research agencies are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “research agencies”. 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 research agencies), 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 research agencies, 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, 89,194 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.

Research agencies by location

96 lists · largest first

Every Research agencies 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 research agencies, 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 research agencies are there worldwide?

RevenueBase identified 18,915 research agencies 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?

Nielseniq, headquartered in Chicago, tops this list with the largest team on record.

Which country has the most research agencies?

The United States leads with 3,662 companies, followed by India (1,648) and the United Kingdom (1,463). Every research agencies list by country and city is linked on this page.

Which city has the most research agencies?

London leads with 711 headquartered companies, followed by New York (355) and Sao Paulo (338).

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 89,194 verified decision-maker contacts tracked across these 18,915 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.