Company lists · Data refreshed September 2026

Top 25 Sampling agencies based in the United States

Name: Sampling agencies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 1,352 companies tracked

RevenueBase identified 1,352 sampling agencies headquartered in the United States as of September 2026 and tracks 27,227 professional contacts across them, including 8,945 with verified work emails. New York is the largest hub.

This list covers sampling agencies headquartered in the United States, 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.

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

1,352Companies

27,227Contacts tracked

8,945Verified emails

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The 25 largest sampling agencies based in the United States

Ranked by team size

Top 25 of 1,352 sampling agencies based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to sampling 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Amspec Group	Indirect evidence	Cranbury, NJ, United StatesHQ checked Sep 21, 2026	5,001-10,000	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, 2026
2	Ipsos In US	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	5,001-10,000	821 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
3	SAGO	Indirect evidence	Iselin, NJ, United StatesHQ checked Sep 21, 2026	1,001-5,000	795 contacts →
	Indirect evidence “Today’s markets demand new research methods.” Source: RevenueBase Database · checked Sep 21, 2026
4	Emsl Analytical, INC	Indirect evidence	Cinnaminson, NJ, United StatesHQ checked Sep 21, 2026	501-1,000	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, 2026
5	SCS Global Services	Indirect evidence	Emeryville, CA, United StatesHQ checked Sep 21, 2026	201-500	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, 2026
6	Azure Knowledge Corporation	Indirect evidence	Palo Alto, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	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, 2026
7	Food Safety NET Services	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 21, 2026	501-1,000	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, 2026
8	Stop And Shop	Indirect evidence	Browns Summit, NC, United StatesHQ checked Sep 21, 2026	51-200	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, 2026
9	American Directions Research Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	201-500	344 contacts →
	Indirect evidence “American Directions Research Group is one of the largest and most experienced market research survey providers in the United States.” Source: RevenueBase Database · checked Sep 21, 2026
10	Atl, A Bureau Veritas Company	Indirect evidence	Milford, OH, United StatesHQ checked Sep 21, 2026	501-1,000	314 contacts →
	Indirect evidence “Founded in 1987, ATL, A Bureau Veritas Company, is a Scientific Sourcing Solutions Company.” Source: RevenueBase Database · checked Sep 21, 2026
11	Schlesinger Group	Indirect evidence	Iselin, NJ, United StatesHQ checked Sep 21, 2026	1,001-5,000	284 contacts →
	Indirect evidence “Schlesinger Group is a technology-led data company that delivers a broad range of qualitative and quantitative research solutions to connect human answers to business questions as…” Source: RevenueBase Database · checked Sep 21, 2026
12	Alpha Analytical	Indirect evidence	Westborough, MA, United StatesHQ checked Sep 21, 2026	501-1,000	254 contacts →
	Indirect evidence “Since 1987, Alpha Analytical, Inc.” Source: RevenueBase Database · checked Sep 21, 2026
13	Curion	Indirect evidence	Deerfield, IL, United StatesHQ checked Sep 21, 2026	201-500	236 contacts →
	Indirect evidence “Curion specializes in delivering impactful insights to the world's top CPG companies, helping them develop winning, repeatedly purchased products.” Source: RevenueBase Database · checked Sep 21, 2026
14	Starlight Analytics	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	n/a	231 contacts →
	Indirect evidence “Smarter Insights for Sustainable Brand Growth Navigate your market with confidence.” Source: RevenueBase Database · checked Sep 21, 2026
15	Blackstone Group	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	51-200	229 contacts →
	Indirect 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 21, 2026
16	Innovatemr	Strong evidence	Calabasas, CA, United StatesHQ checked Sep 21, 2026	51-200	224 contacts →
	Strong evidence “InnovateMR is a full-service sampling and ResTech company that delivers faster, quality insights from business and consumer audiences utilizing cutting-edge technologies to…” Source: RevenueBase Database · checked Sep 21, 2026
17	L&e Research	Indirect evidence	Raleigh, NC, United StatesHQ checked Sep 21, 2026	201-500	218 contacts →
	Indirect evidence “At L&E we make connections to create conversations that help our clients make better decisions, allowing us to give back to our communities and grow our connections.” Source: RevenueBase Database · checked Sep 21, 2026
18	C&c Market Research, INC	Indirect evidence	Fort Smith, AR, United StatesHQ checked Sep 21, 2026	501-1,000	217 contacts →
	Indirect evidence “C&C Market Research is an industry leading market research field service firm based in Fort Smith, AR, which owns and operates over 36 research facilities in major markets all…” Source: RevenueBase Database · checked Sep 21, 2026
19	PRO QC International	Indirect evidence	Mchenry, IL, United StatesHQ checked Sep 21, 2026	501-1,000	211 contacts →
	Indirect evidence “Pro QC International provides tailored quality solutions with a human touch in 100 countries.” Source: RevenueBase Database · checked Sep 21, 2026
20	Certified Group	Indirect evidence	Melville, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	206 contacts →
	Indirect evidence “Certified Group partners with customers to deliver innovative scientific solutions and expertise – So The World Can Trust In What It Consumes®.” Source: RevenueBase Database · checked Sep 21, 2026
21	Luth Research	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 21, 2026	201-500	202 contacts →
	Indirect evidence “Luth Research is the industry-leading path-to-purchase market research firm powered by a revolutionary behavioral data collection technology.” Source: RevenueBase Database · checked Sep 21, 2026
22	Sentry Equipment	Strong evidence	Oconomowoc, WI, United StatesHQ checked Sep 21, 2026	51-200	199 contacts →
	Strong evidence “Sentry Equipment delivers true representative sampling and analysis techniques to customers around the globe.” Source: RevenueBase Database · checked Sep 21, 2026
23	Luce Research	Indirect evidence	Colorado Springs, CO, United StatesHQ checked Sep 21, 2026	201-500	198 contacts →
	Indirect evidence “Luce Research is located in beautiful Colorado Springs, Colorado.” Source: RevenueBase Database · checked Sep 21, 2026
24	Marketvision Research	Indirect evidence	Blue Ash, United StatesHQ checked Sep 21, 2026	51-200	195 contacts →
	Indirect evidence “For 40 years, MarketVision Research has provided its clients with innovative design, execution and interpretation of marketing research to deliver fresh consumer insights and…” Source: RevenueBase Database · checked Sep 21, 2026
25	GEL Laboratories, LLC	Indirect evidence	Charleston, SC, United StatesHQ checked Sep 21, 2026	201-500	190 contacts →
	Indirect evidence “Since 1981, GEL Laboratories has been a leading provider of comprehensive and reliable analytical services to the environmental industry including chemical, radiochemical…” 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: 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 1,352 sampling agencies based in the United States

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Sampling agencies based in the United States at a glance

As of Sep 21, 2026

32.9%Verified-email coverage

20.1Average contacts per company

11-50Median size (employees)

4.2%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

632

11-50

499

51-200

158

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,352 companies.

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.
What qualifies: Companies headquartered in the United States 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. Companies headquartered outside United States are excluded even when they keep an office there.
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, 8,945 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 metro

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 based in the United States?

RevenueBase identified 1,352 sampling agencies headquartered in the United States 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?

Amspec Group, headquartered in Cranbury, tops this list with the largest team on record.

Which city has the most sampling agencies?

New York leads with 57 headquartered companies, followed by Chicago (42) and Los Angeles (30).

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 8,945 verified decision-maker contacts tracked across these 1,352 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.