Are there any custom market research firms that focus on sourcing respondents for specialized survey projects?

Yes. There are custom market research firms and respondent-sourcing specialists that focus on finding participants for niche or hard-to-reach survey projects.

These firms often help with:

• B2B and professional audiences
• Healthcare providers, patients, and caregivers
• Technical or industrial roles
• Rare conditions or low-incidence populations
• International or multilingual samples
• Executive-level respondents
• Custom panel recruitment for a specific study

Common types of providers include:

• Custom research agencies that handle study design plus recruitment
• Sample providers that specialize in sourcing respondents only
• Panel recruitment firms that build private panels for ongoing use
• Qualitative recruitment agencies for interviews, focus groups, and IDIs

Examples of companies in this space include:

• Dynata
• Cint
• Lucid
• InnovateMR
• SSI / Survey Sampling International
• Fieldwork, Schlesinger Group, and similar qualitative recruitment shops
• Specialized B2B sample firms like Respondent or industry-specific recruiters depending on the audience

If you want, I can also help you with:

1. a shortlist of firms by respondent type,
2. questions to ask when vetting them,
3. or a template RFP for sourcing specialized survey respondents.