Respondent.io is a platform that connects researchers and companies with potential participants for market research studies, interviews, and focus groups. It allows businesses to find and recruit participants who meet specific criteria for qualitative research. Researchers post projects on the platform, specifying the type of respondents they need based on demographics, professional background, interests, and other relevant factors. Participants, or "respondents," can sign up on the platform, browse available projects, and apply to participate in studies that match their profile. If selected, respondents are typically compensated for their time and input. The platform is popular among companies and researchers looking to gather insights from specific audiences, such as professionals in a particular industry, users of a specific product, or individuals with particular experiences. Respondent.com is often used for various research purposes, including user experience testing, product development feedback, and market analysis.