Company lists · Data refreshed September 2026
Top 25 Interview research services worldwide
RevenueBase identified 1,760 interview research services worldwide as of September 2026 and tracks 16,307 professional contacts across them, including 3,610 with verified work emails. The United States is the largest market and London the largest hub.
This list covers interview research services 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 20, 2026. Country and city lists for interview research services 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 interview research services worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 664 contacts → | ||||
Indirect evidence “At Market Xcel, we're dedicated to delivering high-quality results for our clients.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 344 contacts → | ||||
Partial 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 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 309 contacts → | ||||
Partial evidence “Colvill Banks are experts in candidate research and identification.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 285 contacts → | ||||
Partial evidence “Fieldwork is a qualitative research partner.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 227 contacts → | ||||
Partial evidence “ActionEdge helps organizations turn questions into clarity through reliable market research and data collection.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 217 contacts → | ||||
Partial 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 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 213 contacts → | ||||
Partial evidence “Kudos Research has been providing high value, competitively priced, market research services to both internal and external clients since 1986.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 206 contacts → | ||||
Partial evidence “CID Gallup, leader in market research, has all the tools to design the study that your company needs.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 142 contacts → | ||||
Partial evidence “IntelliSurvey provides software and services to help professional researchers make business decisions.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 136 contacts → | ||||
Partial evidence “GIM is ranked among the ten most important full-service market research institutes in Germany and conducts international research in over 50 markets for brand name companies…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 130 contacts → | ||||
Partial evidence “FPG provides high-quality marketing research data collection services by leveraging new techniques and technologies to make market insights more accessible, accurate, and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 127 contacts → | ||||
Indirect evidence “At The Link Group, we make complexity feel simple.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 125 contacts → | ||||
Partial 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 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 123 contacts → | ||||
Partial evidence “Rahbar Bazaar is a full-service market research and insight consultancy with over two decades of experience delivering applied research and decision-support studies across a wide…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 118 contacts → | ||||
Indirect evidence “Markteffect is een strategisch marktonderzoeksbureau dat als one-stop-shop dient voor haar opdrachtgevers.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 117 contacts → | ||||
Indirect evidence “V dnešním rychle se měnícím světě jsou spolehlivé informace pro rozhodování důležitější než kdy předtím.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 111 contacts → | ||||
Indirect evidence “Ironwood Insights is a team of expert-level insights consultants who solve critical marketing and business problems for forward-thinking companies.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 111 contacts → | ||||
Partial evidence “BrandEssence Research is a global market research and consulting firm enabling organizations to make confident strategic decisions in an increasingly dynamic business environment.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 111 contacts → | ||||
Indirect evidence “From nationwide recruiting & online sample services to coding, transcription, client list management and incentive processing, our expert team is all in.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 105 contacts → | ||||
Partial evidence “ISA offers real-time access to consumers through quick turn, high impact, custom research solutions.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 90 contacts → | ||||
Partial evidence “MAXimum Research, Inc.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 89 contacts → | ||||
Partial evidence “Together with our network of professional interviewers in the Netherlands, Belgium and France, we collect high-quality data through personal interviews.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 88 contacts → | ||||
Indirect evidence “Deeply Curious” Source: RevenueBase Database · checked Sep 20, 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: interview research services. 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 interview research services.
- Partial evidence
- Its own public description names part of interview research services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name interview research services. 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 1,760 interview research services worldwide
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Interview research services worldwide at a glance
As of Sep 20, 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 interview research services, 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 interview research services are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “interview research services”. 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 interview research services), 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 interview research services, 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, 3,610 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 20, 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.
Interview research services by location
10 lists · largest firstEvery Interview research services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Interview research services based in the United States479
- Interview research services based in the United Kingdom193
- Interview research services based in India149
- Interview research services based in France56
- Interview research services based in Brazil48
- Interview research services based in Canada46
- Interview research services based in Germany46
- Interview research services based in Australia36
- Interview research services based in the Netherlands27
- Interview research services based in Spain26
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 interview research services, 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 interview research services are there worldwide?
RevenueBase identified 1,760 interview research services 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?
Market Xcel, headquartered in New Delhi, tops this list with the largest team on record.
Which country has the most interview research services?
The United States leads with 479 companies, followed by the United Kingdom (193) and India (149). Every interview research services list by country and city is linked on this page.
Which city has the most interview research services?
London leads with 84 headquartered companies, followed by New Delhi (30) and New York (26).
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 3,610 verified decision-maker contacts tracked across these 1,760 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 20, 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.