Company lists · Data refreshed September 2026
Top 25 Respondent recruitment agencies based in the United States
RevenueBase identified 1,245 respondent recruitment agencies headquartered in the United States as of September 2026 and tracks 17,914 professional contacts across them, including 4,030 with verified work emails. New York is the largest hub.
This list covers respondent recruitment 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 29, 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.
The 25 largest respondent recruitment agencies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 969 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 581 contacts → | ||||
Indirect evidence “Unimrkt Research is a Market Research Outsourcing firm that helps global Market Research organizations with their primary and secondary research and support needs.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 444 contacts → | ||||
Partial evidence “M3 Global Research provides the most comprehensive and highest quality market research recruitment and support services available to the global healthcare industry with…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 363 contacts → | ||||
Indirect evidence “Zintro was founded in 2007 to disrupt the existing market research model by offering the same high-quality participants but with more flexibility and for a lower price.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 285 contacts → | ||||
Indirect evidence “Fieldwork is a qualitative research partner.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 224 contacts → | ||||
Indirect 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 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 213 contacts → | ||||
Indirect evidence “User Interviews, now part of UserTesting, gives you fast access to quality participants for 🧑 user research, market research, and 🤖 AI training.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 209 contacts → | ||||
Partial evidence “Established in 1998, ad+one is comprised of hand-picked recruitment professionals with over 30+ years of combined recruiting experience serving the advertising and media agency…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 159 contacts → | ||||
Indirect evidence “We understand that our clients are seeking much more in a talent partner than just securing headcount.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 159 contacts → | ||||
Indirect evidence “Trade Management is a recruiting firm, first and foremost, in the construction industry.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 155 contacts → | ||||
Partial evidence “Respondent is a cost effective, high-quality participant recruiting platform for all research methodologies.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 154 contacts → | ||||
Indirect evidence “At C+R Research, a full-service marketing insights agency, we’ve been helping brands grow for over 65 years, delivering great research, deep perspective, and committed client…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 134 contacts → | ||||
Indirect evidence “When Richard, Wayne & Roberts began in 1978, our goal was to operate on a level of professionalism commensurate with that of the companies we serve.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 130 contacts → | ||||
Indirect evidence “Ajulia Executive Search specializes in seeking quality candidates for top companies in their respective fields.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 127 contacts → | ||||
Partial evidence “PRC Global Market Research, the Nation's Premiere Network of Market Research Recruitment.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 125 contacts → | ||||
Indirect evidence “Insights Opinion is an emerging global leader in research outsourcing, offering expert data collection services to large research and consulting firms.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 122 contacts → | ||||
Indirect evidence “LeadsRus is a market research organization enabling businesses to reach out to and connect with individuals across geographies, industries, and verticals.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 118 contacts → | ||||
Indirect evidence “Starting from 1996 MARC helps Clients to solve different marketing tasks by selecting and implementing of optimum research methodology and effective use of results.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 115 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 29, 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: respondent recruitment 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 respondent recruitment agencies.
- Partial evidence
- Its own public description names part of respondent recruitment agencies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name respondent recruitment 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 1,245 respondent recruitment agencies based in the United States
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Respondent recruitment agencies based in the United States at a glance
As of Sep 29, 2026Companies by employee count
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 1,245 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 respondent recruitment 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 “respondent recruitment 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 respondent recruitment 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 respondent recruitment 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, 4,030 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 29, 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.
Respondent recruitment 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 respondent recruitment 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 respondent recruitment agencies are there based in the United States?
RevenueBase identified 1,245 respondent recruitment 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?
Self Opportunity, INC, headquartered in Lewisville, tops this list with the largest team on record.
Which city has the most respondent recruitment agencies?
New York leads with 86 headquartered companies, followed by Los Angeles (42) and Chicago (40).
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 4,030 verified decision-maker contacts tracked across these 1,245 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 29, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,245 respondent recruitment agencies based in the United States. Start with a free account, no credit card.
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Respondent recruitment agencies by geography
- Respondent recruitment agencies based in Brisbane, Australia
- Respondent recruitment agencies based in Melbourne, Australia
- Respondent recruitment agencies based in Sydney, Australia
- Respondent recruitment agencies based in Sao Paulo, Brazil
- Respondent recruitment agencies based in Montreal, Canada
- Respondent recruitment agencies based in Toronto, Canada
- Respondent recruitment agencies based in Paris, France
- Respondent recruitment agencies based in Berlin, Germany
- Respondent recruitment agencies based in Hamburg, Germany
- Respondent recruitment agencies based in Chennai, India
- Respondent recruitment agencies based in Mumbai, India
- Respondent recruitment agencies based in New Delhi, India
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.
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- Respondent recruitment agencies based in Brisbane, Australia
- Respondent recruitment agencies based in Melbourne, Australia
- Respondent recruitment agencies based in Sydney, Australia
- Respondent recruitment agencies based in Sao Paulo, Brazil
- Respondent recruitment agencies based in Montreal, Canada
- Respondent recruitment agencies based in Toronto, Canada