Prolific

Prolific is an online platform that connects AI developers, researchers, and product teams with verified participants who take part in studies. It addresses the need for reliable human data for tasks such as training AI models, evaluating model outputs, and conducting behavioral or market research. Participants are vetted, active, and paid for their contributions, and an internal quality system, Protocol, runs checks to verify identity and analyze behavioral data.

The platform offers demographic filtering, custom screening, representative and quota samples, and integrations with survey, annotation, and user research tools via URL or API. It includes AI-specific capabilities such as agentic evaluations and benchmarks, a Human Feedback API, agent workflows, and access to domain experts in areas like healthcare and coding. Prolific also provides a managed-services option where an expert team handles complete datasets, including curation, participant training, quality assurance, and reporting.

Prolific is packaged in two ways: a pay-as-you-go platform with no monthly fees or contract, where customers pay participant rewards plus a platform fee, and a custom-priced managed-services offering. The platform supports unlimited users and workspaces, and managed services are typically governed by a statement of work.