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Listed Sydney-based provider of AI training data, RLHF, speech and multimodal data, with the ADAP platform and a global contributor network.
Prolific AI features and pricing (October 2026)
Human data platform with verified participants for AI training, preference data, evaluations and research.
Usage-based
Pricing: Usage-based
Participant rewards you set plus a platform fee of 42.8 percent for companies (33.3 percent for academic and nonprofit), recommended minimum £9.00 or $12.00 per hour, no contract; managed services by quote, as of September 2026.
What is Prolific?
Prolific connects AI developers, researchers and companies with verified participants who provide human data, from preference judgments for model training to evaluations of AI agents and academic studies.
The self-serve platform offers verified participants, custom screening, API access and unlimited users. For AI work, Prolific provides human feedback for preference tuning, safety evaluations, benchmarks and agent evaluations, plus access to domain experts such as healthcare professionals and software engineers. Managed services add curation and quality assurance under a statement of work. Prolific is based in London, holds ISO/IEC 27001:2022 and names Google, Hugging Face and AI2 among its users. Pricing is a platform fee on top of participant rewards.
Prolific AI features and use cases
- Collects preference data for fine-tuningParticipants compare or rate model responses, producing the preference data used for tuning. Model teams get judgments from a defined, verified population instead of anonymous crowds.
- Evaluates models and agentsStudies test how people experience model answers or agent behavior across tasks. Teams learn how a model performs for real users, beyond automated metrics.
- Brings in domain expertsFilters select participants with expertise such as healthcare or software engineering. Specialized tasks get judgments from people qualified to assess them.
What sets Prolific apart
- Transparent pay-as-you-go model with a published platform fee and minimum pay rates for participants.
- Discount for academic and nonprofit organizations of 9.5 percentage points.
Where Prolific is strongest
United Kingdom Available internationally
Prolific is headquartered in London and states participant pay rates in pounds and US dollars.
Questions to ask before you buy Prolific
Budget both participant rewards and the platform fee, which is 42.8 percent for companies. Specialized tasks need higher pay to attract qualified people. Avoid putting personal or confidential data into tasks unless your agreement covers it, and request the data processing terms.
Prolific reviews
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Questions about Prolific
What does Prolific cost?
You set the participant reward and pay a platform fee on top: 42.8 percent for companies, 33.3 percent for academic and nonprofit organizations. There is no contract or upfront cost.
What is the minimum pay rate?
Prolific recommends at least £9.00 or $12.00 per hour and requires an absolute minimum of £6.00 or $8.00.
Which certifications does Prolific hold?
ISO/IEC 27001:2022, according to its website.
Prolific update historyno updates yet
No changes recorded for Prolific yet.
Changes the vendor made and confirmed user reports, each checked against the vendor's own pages. We review every tool monthly.
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