Company lists · Data refreshed September 2026
Top 25 Sampling agencies worldwide
RevenueBase identified 6,670 sampling agencies worldwide as of September 2026 and tracks 152,842 professional contacts across them, including 34,138 with verified work emails. The United States is the largest market and London the largest hub.
This list covers sampling 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 sampling 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.
The 25 largest sampling agencies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 23,155 contacts → | ||||
Indirect evidence “Intertek is a leading Total Quality Assurance provider to industries worldwide.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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, 2026Thanks. The Data Team will review it. | |||||
| 3 | 3,447 contacts → | ||||
Indirect evidence “The AmSpec Group has been relied upon in the testing, inspection, and certification (TIC) sector for several decades.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 2,309 contacts → | ||||
Indirect evidence “Surveyor Indonesia didirikan pada tanggal 1 Agustus 1991.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 969 contacts → | ||||
Indirect evidence “De Inspectie Leefomgeving en Transport (ILT) is de toezichthouder van het ministerie van Infrastructuur en Waterstaat.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 808 contacts → | ||||
Indirect evidence “Fundada em 2001, a Genesis construiu uma vitoriosa trajetória em certificação, auditorias de boas práticas agropecuárias, monitoramento a campo, inspeção e supervisão de embarques…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 795 contacts → | ||||
Indirect evidence “Today’s markets demand new research methods.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 764 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 9 | 741 contacts → | ||||
Indirect evidence “Hansa Research is a full-service global market research agency conducting research in over 100 countries.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 738 contacts → | ||||
Indirect evidence “We are committed to strengthening safety systems with the most reliable Testing and Auditing Solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 719 contacts → | ||||
Indirect evidence “As the nation's leading environmental testing firm, EMSL's network of nationwide laboratories has been providing quality analytical services since 1981.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 667 contacts → | ||||
Indirect evidence “Scientific Certification Systems, Inc, now doing business as SCS Global Services, is a trusted leader in third-party environmental, sustainability and food quality certification…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 664 contacts → | ||||
Indirect evidence “At Market Xcel, we're dedicated to delivering high-quality results for our clients.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 643 contacts → | ||||
Indirect evidence “Kadence International is a worldwide market research agency with a distinctly local feel.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 623 contacts → | ||||
Indirect evidence “ANINDYA is an independent surveying company that provides quality and quantity superintending service for the coal and minerals industry, the oil and gas sector as well as marine…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 600 contacts → | ||||
Indirect evidence “Azure Knowledge Corporation, headquartered at Piscataway, NJ, is a globally trusted provider of market research and digital experience solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 594 contacts → | ||||
Indirect evidence “Saybolt is the trade name for Core Laboratories' laboratory analyses, independent field inspections, and monitoring and verification programs for crude oil and its derived…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 593 contacts → | ||||
Indirect evidence “A Kuhlmann atua na área de supervisão e controle de cargas desde 1989.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 585 contacts → | ||||
Indirect evidence “Leader des prestations analytiques environnementales et agroalimentaires accrédité COFRAC, agréé par le Ministère de la santé Votre environnement et votre santé sont nos priorités.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 573 contacts → | ||||
Indirect evidence “MSK is a leading Independent Inspection, Testing and Certification Expert, with a global network of offices and laboratories in 28 countries across 5 continents, with headquarters…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 502 contacts → | ||||
Indirect evidence “Kantar is the world’s leading marketing data and analytics company.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 451 contacts → | ||||
Indirect evidence “As part of Certified Group, Food Safety Net Services (FSNS) and Certified Laboratories partner with customers to deliver innovative scientific solutions and expertise – So The…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 404 contacts → | ||||
Indirect evidence “INJ Partners is a leading provider of end-to-end market research solutions, helping businesses navigate complex market landscapes with data-driven insights that drive real impact.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 391 contacts → | ||||
Indirect evidence “Stop and Shop is a market research company based out of Osceola Ossipee Rd, Browns Summit, North Carolina, United States.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 368 contacts → | ||||
Indirect evidence “Laboratories that carry out analysis in different fields: environment, pharmaceutical, food, health and safety, agrochemicals and consumer product testing - Environmental…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
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: sampling agencies. 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 sampling agencies.
- Partial evidence
- Its own public description names part of sampling agencies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name sampling agencies. 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 6,670 sampling agencies worldwide
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Sampling agencies worldwide at a glance
As of Sep 21, 2026Companies by employee count
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 sampling 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 sampling agencies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “sampling 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 sampling 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 sampling 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, 34,138 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.
Sampling agencies by location
34 lists · largest firstEvery Sampling agencies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Sampling agencies based in the United States1,352
- Sampling agencies based in India666
- Sampling agencies based in the United Kingdom343
- Sampling agencies based in Brazil303
- Sampling agencies based in France209
- Sampling agencies based in Germany207
- Sampling agencies based in Italy184
- Sampling agencies based in Canada163
- Sampling agencies based in Spain143
- Sampling agencies based in Australia130
- Sampling agencies based in Mexico128
- Sampling agencies based in the Netherlands122
- Sampling agencies based in Türkiye112
- Sampling agencies based in South Africa83
- Sampling agencies based in Colombia82
- Sampling agencies based in Indonesia70
- Sampling agencies based in Chile62
- Sampling agencies based in Argentina60
- Sampling agencies based in the United Arab Emirates59
- Sampling agencies based in Peru58
- Sampling agencies based in Poland47
- Sampling agencies based in Belgium39
- Sampling agencies based in Sweden39
- Sampling agencies based in Switzerland38
- Sampling agencies based in Japan36
- Sampling agencies based in Romania36
- Sampling agencies based in Portugal34
- Sampling agencies based in Malaysia33
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 sampling 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 sampling agencies are there worldwide?
RevenueBase identified 6,670 sampling 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?
Intertek, headquartered in London, tops this list with the largest team on record.
Which country has the most sampling agencies?
The United States leads with 1,352 companies, followed by India (666) and the United Kingdom (343). Every sampling agencies list by country and city is linked on this page.
Which city has the most sampling agencies?
London leads with 125 headquartered companies, followed by New Delhi (113) and Mumbai (77).
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 34,138 verified decision-maker contacts tracked across these 6,670 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.