Get high-quality human evaluation data for AI alignment and evaluation - integrated with your ML pipelines. From setup to data in hours, not weeks.
Trusted by over 3000 world-renowned organizations
STEP 1
Start your project
Start by setting up a new study in your workspace. Name it clearly and describe the task the participants need to complete.
Sign up and start instantly. No contracts, no minimums - just transparent pay-as-you-go pricing.
STEP 2
Connect your tasks
Host your tasks on any data collection interface - yours or third-party, across text, image, audio and video.
Add task URLs via our UI or API. Use Taskflow to dynamically distribute thousands of unique tasks.
Or create text annotation and evaluation tasks directly with AI Task Builder.
FEATURES
STEP 3
Find your audience
Target the most relevant participants for your project.
Use our 300+ prescreeners, or choose specialist participants verified for their AI evaluation skills or domain expertise.
STEP 4
Set reward rates and launch
Set participant payments based on task complexity, time and expertise required. Use in-app calculator and recommended rates for guidance.
Add funds and start collecting data in minutes.
Monitor submissions in real-time to track project completion.
FEATURES
Need end-to-end support?
Get complete datasets and let our managed services team handle participant sourcing, quality assurance, and project management - so you can focus on model development.
Use cases
How leading AI teams use Prolific
From frontier labs to AI-first startups, teams rely on Prolific's human intelligence layer to build safer, more capable models.
How our customers use Prolific
Trusted by AI/ML developers, researchers, and leading organizations in academia and across industries.
High-skilled annotators
Shovels used Prolific to find high-skilled, specialist participants to label building permits. These labels form the basis of quality datasets that become a baseline for the accuracy of their AI model.
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Text-to-image AI models
Prolific’s streamlined participant management process meant researchers could achieve a high level of engagement and satisfaction among participants. This was necessary for obtaining high-quality data.
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Research the future of work
By offering a user-friendly platform, pre-verified participants, and advanced screening options, Prolific enabled Asana to immediately customize their target audience with extreme precision.
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Questions?
How do I know Prolific is the right fit for my use cases?
Teams building leading frontier AI models and AI products use Prolific for model evaluation, RLHF data collection, safety testing, and UX research. Our platform works with any annotation tool that generates URLs, supporting all data modalities - text, image, audio, and video.
How is Prolific different from other alternatives?
We give you direct access to 200,000+ verified participants through an API-first platform - no hired annotation teams or black-box operations. Host tasks on your infrastructure, access people and experts from all walks of life, and get results in hours instead of weeks.
How quickly will I get my data?
You will start to see data typically arrive within hours. Simple tasks can complete on the same day, while specialized domain expert tasks may take a few days depending on requirements.
Are Prolific participants genuine? How can I be sure of the data quality?
We manage quality by maintaining a bar for entry and participation on our platform. We have 200,000+ active participants on the platform, with over a million on the waitlist. Protocol, our AI-powered quality monitoring system, runs 40+ checks to verify identity during onboarding and analyze behavioral data when they contribute data to ensure only verified participants are on the platform. You have full control over submission approval and can reject submissions that show negligent behavior (e.g. failed attention and comprehension checks). For more details on approvals and rejections, check out our help center article.
What types of participants can I access?
Our 300+ prescreeners lets you access 200,000+ participants from our Global Crowd. These prescreeners cover a range of profile information including demographics, their personal and professional background, and their Prolific submissions history among other things. Additionally, you can also access AI Taskers and Domain Experts - participants verified for their skills in AI training and evaluation tasks and subjects like STEM, programming, healthcare and others.
Can I integrate with my existing annotation tools?
Yes. Many teams using Prolific use their custom annotation tools or third-party solutions that generate a task URL - which you can connect participants with using our UI or API. Alternatively, you can also use AI Task Builder for text annotations and evaluations.
How does pricing work?
Our pricing is straightforward and transparent:
- When you’re accessing the platform directly, you pay a participant reward that you set, plus a platform fee.
- When you need managed services, pricing is calculated based on your project scope and requirements.
For more details, visit our pricing page.
How should I estimate participant rewards?
Typically, we recommend you pay participants at least £9.00 / $12.00 per hour, while the minimum pay allowed is £6.00 / $8.00 per hour. For tasks requiring specialized skills (like experience in AI annotation tasks, coding experience, or advanced STEM degrees), we recommend higher compensation to reflect their expertise and the complexity of the tasks. Fair compensation leads to better data quality and higher engagement, especially when publishing complex tasks or studies. For more details, visit our pricing page.
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