Learn more about our integrated panel partners (Prolific, User Interviews, & Respondent)

Last updated: June 25, 2026

If you decide to recruit via Outset, you can recruit through one of Outset's three integrated panel partners: Prolific, User Interviews, or Respondent. Researchers can access all three panels natively in Outset for flexible, self-serve recruitment across a wide range of participant types.

Here's a guide to help you understand the differences across key dimensions and when each panel may or may not be the right fit.

Understand the Three Panels

Prolific, User Interviews, and Respondent provide sourcing for high-quality qualitative interviews. Here's a bit more info on where these panels focus on and differ -

1. Participant Type

Prolific

Prolific provides access to general population participants, ideal for studies focused on everyday consumer behavior. Participants can be pre-filtered using demographic and behavioral data.

  • geared toward B2C research

Use Prolific's participant count checker to explore their pool!

User Interviews

User Interviews supports a broader range of participant types, including both general consumers and niche professional roles, like product managers, marketers, engineers, or healthcare professionals.

  • supports both B2B and B2C research

Respondent

Respondent specializes in hard-to-reach professional and B2B audiences, including executives, specific job functions, industry verticals, and niche consumer segments, as well as 'professional-consumer' B2C audiences (e.g., tech users, high-income earners).

  • B2C 'professional-consumer' audiences

    • Tech users, high-income earners

  • B2B research and niche professional audiences

    • Well-suited for general decision-makers, senior roles, and select specialized industries (e.g., procurement leads, specific medical specialties, C-suite at mid-market companies)

Respondent is a great first choice when your study requires general executives, specialized professional roles, or hard-to-reach B2B profiles. It also has the most geographical coverage among the three options, so start here for B2B audiences in the markets listed below.

2. Geographic Coverage

Prolific

Prolific has good global reach with strong coverage in the US and UK, and is growing presence in the APAC region.

Strong presence (≥ 5000 participants)

Some presence (≥ 1000 participants)

Limited presence (< 1000 participants)

United States, United Kingdom, South Africa, Canada, Germany

Australia, Portugal, Poland, Italy, Mexico, Spain, Netherlands, France, Ireland, Greece

Hungary, Chile, New Zealand, Sweden, Belgium, Australia, Israel, Japan, Switzerland, Czech Republic, Slovenia, Estonia, India, Norway, Finland

User Interviews

User Interviews recruits in the core markets of US, Canada, UK, France, Germany, Australia, South Africa, and India. These markets all have 30K+ participants, with the US having over 4M participants.

They've recently expanded to new countries, including Brazil, Pakistan, Spain, Netherlands, Mexico, Poland, Portugal, New Zealand, Italy, and Ireland. See more in their 2025 panel report. These markets all have >10K participants, and are available for recruitment through Outset by request (please contact our team for more info).

Respondent

Respondent has strong coverage in North America (US/Canada), the UK, Western Europe, and Australia, along with coverage in many other countries, as listed below.

Strong presence (≥ 100k)

Some presence (≥ 25k)

Limited presence (< 25k)

United States, Canada, United Kingdom, Brazil, India, South Africa

Australia, Germany Indonesia, Philippines, Kenya

France, Morocco, Egypt, Romania, Italy, Mexico, Protugal, Malaysia, Spain, UAE, Jamaica, Netherlands, Colombia, Ireland, Argentina

Reminder that geography may influence feasibility for niche audiences—especially for B2B roles in emerging markets.

3. Cost Per Participant

Here’s an in-depth discussion on pricing for all three panels: How much will it cost to recruit participants through Outset?

4. Participant Quality and Fraud Prevention

Both Prolific and User Interviews have strong systems in place to help improve participant quality and prevent fraud.

Prolific

  • Uses prescreening and demographic filters completed directly by participants.

  • Offers transparent metrics like approval rate and time to complete, helping researchers assess data quality.

  • Has built-in attention checks, IP validation, and response speed monitoring.

Read more about Prolific’s fraud prevention here.

User Interviews

  • Applies an AI-driven matching algorithm using 400M+ data points to pair participants with studies.

  • Calculates a fraud score at sign-up and recalculates it with every application.

  • Uses automated checks to catch duplicate identities, suspicious occupation patterns, and copy/pasted screener responses.

  • Includes advanced project-level protections for high-risk studies

  • Less than 0.3% of interviews are flagged fraudulent

Read more about User Interviews's fraud prevention here & here.

Respondent

Respondent uses a rigorous vetting process for their professional panel, including profile verification and quality scoring. This process includes a work email re-authentication every 90-days and LinkedIn verification.

For more on how to set up screeners that deter low-quality responses & fraud, check out our guide on fraud prevention best practices here.

When might none of these panels be the right fit?

While Outset's integrated panel partners (Prolific, User Interviews, and Respondent) are a great fit for many research needs, there are some situations where they may not be the best fit. This typically happens when your study requires very niche participants or strict quotas that lead to very low incidence rates.
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​Read more here: Planning ahead for recruiting hard-to-reach audiences