Prolific

What Prolific is

Prolific connects researchers and AI developers with verified participants for human-data collection. It supports academic, market and user, and policy research, along with AI work such as human evaluation, preference data collection, and training-data tasks, including specialist annotations across 80+ languages. Researchers can use 300+ audience filters, representative or quota samples, and custom screening. Studies can connect to many survey, annotation, and user research tools through a URL or the API; named integrations include Qualtrics, Gorilla, Maze, Typeform, Google Forms, and Argilla. Prolific says its Protocol system runs 40+ checks related to participant identity and behavior. It lists ISO 27001 and Cyber Essentials certifications, and says the EU GDPR is its worldwide privacy baseline. The pay-as-you-go web platform has no monthly fee, but charges participant rewards plus a platform fee, usually 42.8% for corporate customers or 33.3% for academic or non-profit customers. Managed services offer a dedicated project team and shared Slack channels. The API does not handle account top-ups or user management; those functions are available in the web application. Participants must be at least 18, and studies cannot include children.