Prolific

What Prolific does

Prolific is a London-headquartered data infrastructure platform that connects researchers and AI developers with a global, identity-verified pool of human participants. Founded at the University of Oxford in 2014, the company serves AI/ML developers, academic researchers, policy and public-sector organizations, and enterprise product/research teams, providing self-serve and managed access to 200,000+ active verified participants across 38+ countries and 80+ languages for surveys, AI training data, evaluation, and behavioral research. Customers include Google, Google DeepMind, AI2, Stanford, Yale, Columbia, CMU, NIH, Hugging Face, World Bank, European Commission, IBM, and Asana, among 10,000+ organizations.

The platform is built on a proprietary five-layer quality system called Protocol that runs 50+ identity, behavioral, and authenticity datapoints, layered on top of a bank-grade ID verification, 40+ onboarding checks, continuous fraud detection, in-study authenticity checks, performance-based controls, and motivated-participant policies. Prolific surfaces the participant pool through a self-serve web UI, a REST API, an open-source CLI, and an MCP server compatible with Claude Code, Claude Desktop, and Cursor, enabling direct integration into RLHF, DPO, and reward-model training pipelines. The company also publishes the HUMAINE Leaderboard, a peer-reviewed (ICLR 2026) public benchmark that ranks frontier LLMs using a Hierarchical Bayesian model and TrueSkill tournament design, and offers a 100% Human Guarantee that refunds twice the cost of any AI agents that bypass pre-study checks.

Prolific monetizes through a transaction-based platform fee (42.8% for corporate customers, 33.3% for academic and non-profit) on top of researcher-set participant rewards (minimum £6/$8 per hour, recommended £9/$12 per hour), supplemented by quote-based Managed Services delivered under statement of work, and premium access to AI Taskers and Domain Experts. Distribution combines product-led growth (self-serve, no minimum, no subscription), a three-tier Partner Program (Tech, Channel, GTM) embedding Prolific into third-party research and AI tools, and enterprise field sales for managed and high-value accounts. The company raised a £25M (~$32M) Series A in July 2023 co-led by Partech and Oxford Science Enterprises, opened a New York City hub in February 2024, and is ISO 27001:2022 certified with SOC 2 Type 1 compliance (Type 2 in progress).

Name

Prolific

Legal name

Prolific

Website

https://prolific.com

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

101–250 employees

Short description

Prolific is a London-based data infrastructure platform that connects AI developers, academic researchers, and enterprises with a global pool of 200,000+ ID-verified human participants for surveys, AI training data, evaluation, and safety research across 38+ countries.

Ownership category

akta.pro rank

Product category

AI Training Data Platform

NAICS

Software Publishers (513210), Custom Computer Programming Services (541511)

SIC

Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

Certification & Credentialed Creator Programs (MPACALAI)

Keywords

• Human data collection
• AI training data platform
• Online participant recruitment
• RLHF and evaluation
• Behavioural research software

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Marketing or Sales, Infrastructure, Operations

Revenue model

1. Platform fee on participant rewards: Pay-as-you-go: researchers set a participant reward (minimum £6/$8 per hour, recommended £9/$12 per hour), and Prolific charges a platform fee on top — typically 42.8% for corporate customers and 33.3% for academic / non-profit customers. No subscription, no monthly minimum.
2. Managed Services (AI and Research): End-to-end project delivery under Statement of Work: expert curation, custom sourcing campaigns, participant training and onboarding, multi-stage QA, dedicated project team, shared Slack channels, data analysis and reporting. Custom-priced per project scope.
3. Domain Expert and AI Tasker premium access: Premium segments of the participant pool (verified domain experts in healthcare, STEM, law, finance, programming; specialist AI Taskers calibrated to evaluation tasks) accessed via the platform or fully managed — typically higher compensation.

Pricing tiers

Go-to-market motion6 records

Distribution channels5 records

Marketing channels10 records

Core offering

Prolific operates a cloud-based participant recruitment and data collection platform that gives AI developers and academic researchers programmatic access to a pool of 200,000–300,000+ identity-verified human participants across 38+ countries and 80+ languages. Customers launch studies, evaluations, preference tasks, and safety tests through a self-serve web app, a REST API, a CLI, and an MCP server, with end-to-end Managed Services available for complex engagements. Revenue is generated via a take-rate platform fee (42.8% corporate / 33.3% academic) on researcher-set participant rewards and via custom-priced SOWs for managed delivery.

Product overview

Prolific is a unified, API-first data infrastructure platform for AI and research, organized around a core platform with audience modules, AI training/evaluation modules, and developer tools. The core Prolific Platform (AI Evaluation & Training) provides access to 300,000+ verified participants in 38+ countries and exposes them via a REST API, a CLI, and an MCP server. Around this core, the Alignment & Preference Data, Model Evaluation & Safety, and Model Training & Fine-Tuning modules provide specialized AI development workflows (RLHF, DPO, SFT, safety testing). Audience modules — Global Crowd, AI Taskers, and Domain Experts — segment the participant pool, while Audience Finder is the discovery tool used to filter them. The HUMAINE Leaderboard is a public benchmark sub-product that ranks frontier LLMs using the same participant network, and the 100% Human Guarantee is a quality commitment backed by Protocol, the multi-layer AI-powered data quality system. The platform is delivered as either a self-serve Prolific Pricing tier (pay-as-you-go) or Prolific Managed Services (end-to-end expert delivery), with Prolific for Research, Academic Research Solution, Prolific for Participants, and Prolific Expert Network representing distinct go-to-market surfaces.

Differentiator

Problem solved

Functional benefit

Brands

• HUMAINE: Human-centered AI evaluation framework and public leaderboard for assessing frontier LLMs, published in partnership with Hugging Face and featured at ICLR 2026.
• Protocol

Products and services

• Prolific Platform (self-serve, pay-as-you-go) SaaS platform providing on-demand access to 300,000+ verified participants for AI training, evaluation, alignment, and academic research. Includes 300+ prescreening attributes, AI Taskers, Domain Experts, representative and quota samples, custom screening, API access, no-code integrations, and unlimited users/workspaces. Priced via a take-rate platform fee on researcher-set participant rewards.
• Prolific Managed Services
• Prolific REST API REST API exposing Prolific's participant network with study creation, cohort specification, response retrieval, idempotency keys, API-key authentication scoped to workspaces, and signed webhook payloads (response.submitted, study.completed). Supports JSONL export for direct ingestion into RLHF, DPO, and reward-model training pipelines.
• Prolific CLI Command-line interface for launching studies, waiting on completion, exporting responses, and managing filters from a shell. Scriptable in any pipeline including CI runners and agent orchestrators. Open source under github.com/prolific-oss/cli.
• Prolific MCP Server Model Context Protocol server that lets LLM agents launch preference studies, gate releases on human evaluation scores, escalate to humans for disambiguation, and run red-teaming as a pipeline step. Compatible with Claude Code, Claude Desktop, Cursor, and any MCP-compatible client. Open source at github.com/prolific-oss/prolific-mcp.
• HUMAINE Leaderboard Public benchmark and evaluation framework for assessing frontier LLM behavior in real-world, human-facing conditions. Ranks models on reasoning, communication style, core task performance, adaptiveness, trust, ethics, and safety using a tournament design and Hierarchical Bayesian model. Hosted on Hugging Face Spaces in partnership with Human Feedback Foundation; published as a conference paper at ICLR 2026.
• Domain Experts (premium audience) Verified subject-matter expert network across healthcare, STEM, coding, languages, law, and finance providing expert-verified training data, evaluations, and safety/adversarial testing for AI development. Accessed via the platform or fully managed.
• AI Taskers (premium audience) Specialist participants calibrated to complex AI tasks, including model evaluation, benchmarking, side-by-side comparisons, and factuality and accuracy assessment. Verified for AI annotation and evaluation skills.

Quantifiable outcome

• 97% study completion rate; complete datasets in under 2 hours on average
• +12 more outcomes

Named customers25 records

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration12 records

AI capability15 records

Feature10 records

Partnerships

Ten partnerships are on record, tiered core, major, strategic and supporting.

• MazecoreChannel Partner/ Reseller/ DistributorChannel/Tech Partner that integrates Prolific's 200,000+ participants into its product research platform. Lydia Markwick (Sr Product Manager, Maze) reports that switching to Prolific doubled their Panel Customer Satisfaction Score from 25 to 51 (out of 100) within 2 months.
• GorillacoreChannel Partner/ Reseller/ DistributorLong-time partner since Gorilla's launch in 2016. Jo Evershed (CEO, Gorilla) cites Prolific's alignment with Gorilla's academic-research values and notes the platform's reliable, high-quality participants for their clients. Listed as a Tech Partner on the Prolific partner marketplace.
• RemeshcoreChannel Partner/ Reseller/ DistributorChannel/Tech Partner integration. Remesh uses Prolific's participants in its live conversational research platform; cited as 'Prolific is the Ben to our Jerry' (Jessica Dubin, CPO) and praised for a sub-1% removal rate on qualitative research. Co-delivers Global Dialogues with CIP on top of Prolific infrastructure.
• VoiceformcoreChannel Partner/ Reseller/ DistributorTech/Channel partner. Philip Brook (CEO, Voiceform) credits Prolific with enabling a 'completely new revenue stream' for Voiceform; positioning as 'the HubSpot of human data collection'.
• Outset AIcoreChannel Partner/ Reseller/ DistributorTech/Channel partner listed on the Prolific partner marketplace; referenced in case studies for AI-powered qualitative research at quantitative speed.
• Hugging FacemajorStrategic or Co-development PartnerHosts the HUMAINE leaderboard and HUMAINE evaluation dataset as a dedicated app on Hugging Face Spaces; co-development partnership on the peer-reviewed HUMAINE framework. Listed on the Prolific partner marketplace and is itself a Prolific customer (logo on AI page).
• Human Feedback FoundationstrategicStrategic or Co-development PartnerPartner on the HUMAINE framework; logo displayed alongside Hugging Face on the HUMAINE leaderboard page. Logo also appears on the Domain Experts page.
• Collective Intelligence Project (CIP)majorStrategic or Co-development PartnerLong-running strategic partnership on Global Dialogues: CIP and Prolific co-develop and operate a recurring global AI governance research program with 1,000 participants from 70+ countries every two months. Prolific handles custom global stratification, quota framework, and managed services.
• Google CloudstrategicGTM or Marketing PartnerGTM partnership with Prolific; listed on the Prolific partner page with a dedicated 'Google Cloud & Prolific' co-marketing case study.
• Factored AIsupportingStrategic or Co-development PartnerListed as an 'in partnership with' logo on the HUMAINE leaderboard page, indicating collaboration on the human-centered LLM evaluation framework.

Scale indicators17 records

Recent moves7 records

Expansion highlights7 records

Direct peers

• Toloka: Toloka is a crowdsourcing platform for AI data labeling and human-in-the-loop evaluation, with a global participant pool and focus on RLHF and model evaluation. Directly comparable to Prolific in serving AI developers with human feedback data, though it relies more on a wider crowd and less on identity verification.
• Surge AI: Surge AI is a data labeling platform focused on high-quality human feedback for frontier AI models, including RLHF and red-teaming. Direct competitor in the AI evaluation and preference data space, with a strong reputation among leading AI labs.
• CloudResearch (formerly TurkPrime): CloudResearch is an online research platform providing verified participants for academic and commercial research. It competes with Prolific in the academic and behavioral research segment, with comparable quality and participant verification capabilities.
• Respondent.io: Respondent is a participant recruitment platform focused on B2B and professional research, connecting researchers with vetted professionals for qualitative and quantitative studies. Comparable in providing high-quality participants but skewed more toward B2B and expert recruitment than mass-scale AI training.

Broad incumbents

• Appen: Appen is a long-established public company providing data annotation, collection, and evaluation services for AI. It competes with Prolific on AI training data but serves a much broader set of use cases (speech, image, text annotation) and has a more enterprise/government-focused go-to-market.
• UserTesting: UserTesting is a leading human insight platform for UX research and product feedback, with a large panel of verified participants. While broader in scope (UX testing, video feedback), it overlaps with Prolific's market and user research segment.
• Mechanical Turk (Amazon MTurk): Amazon Mechanical Turk is a long-standing crowdsourcing marketplace for human intelligence tasks. While broader and more commoditized, it competes with Prolific for researchers seeking low-cost human data, and Prolific positions its quality and verification as a premium alternative.

Emerging players

• Maze: Maze is a product research platform that integrates Prolific's participant pool for user research. It is a channel partner of Prolific and competes indirectly in the user research tooling stack, while also serving as a distribution channel for Prolific participants.
• Remesh: Remesh is a live conversational research platform that uses Prolific's participant pool for qualitative research at scale. Comparable as a tech/channel partner and a complementary qualitative research tool that embeds Prolific's verified participants.
• Outset: Outset is an AI-powered qualitative research platform that leverages Prolific participants to conduct moderated interviews and surveys at quantitative scale. Comparable as a channel partner and an emerging competitor in the AI-augmented research tooling space.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• GitHubgithub.com/prolific-oss
• YouTubeyoutube.com/watch?v=bW6bc98fyaM
• LinkedInlinkedin.com/company/prolific-com
• Xx.com/prolific
• Facebookfacebook.com/prolificac

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Funding overview

Funding rounds2 records

Investors6 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Prolific