Prolific
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.
- Company typePrivate
- Founded2014
- HeadquartersLondon, United Kingdom
- Headcount101–250
- GTM typeB2B
- OfferingSoftware
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).
Prolific firmographics
Firmographics- 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
Prolific industry classification
Industry- 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
Where Prolific is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices3 records
Markets served
Prolific business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Marketing or Sales, Infrastructure, Operations
Revenue model
- 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.
- 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.
- 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
| Model | Billing | Price |
|---|---|---|
| Transaction based/ take rate | Pay-as-you-go | Platform – Pay as you go (Popular) |
| Other | Multi-year contract | Managed Services – Custom |
Go-to-market motion6 records
Distribution channels5 records
Marketing channels10 records
Prolific product offering
Product offeringCore 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
Companies that use Prolific
Customer profileNamed customers25 records
Segments6 records
Ideal customer profiles4 records
Prolific technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration12 records
AI capability15 records
Feature10 records
Prolific partnerships and signals
Strategic signalPartnerships
Ten partnerships are on record, tiered core, major, strategic and supporting.
- MazecoreChannel/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.
- GorillacoreLong-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/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.
- VoiceformcoreTech/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 AIcoreTech/Channel partner listed on the Prolific partner marketplace; referenced in case studies for AI-powered qualitative research at quantitative speed.
- Hugging FacemajorHosts 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 FoundationstrategicPartner 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)majorLong-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 partnership with Prolific; listed on the Prolific partner page with a dedicated 'Google Cloud & Prolific' co-marketing case study.
- Factored AIsupportingListed 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
Prolific competitors and assessment
Company assessmentDirect 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
Prolific social profiles
Digital presenceProlific compliance and trust
Trust signalCompliance6 records
Prolific financial estimates
Financial estimateRevenue estimate
Valuation estimate
Prolific leadership team
Management profileNumber of profiles
Profiles9 records
Prolific funding detail
Funding detailFunding overview
Funding rounds2 records
Investors6 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Prolific M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Prolific
What does Prolific do?
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.
Is Prolific a public or private company?
Prolific is a private company. It is classified as venture growth investor backed and is currently operating.
When was Prolific founded?
Prolific was founded in 2014. It employs 101 to 250 people.
Where is Prolific based?
Prolific is headquartered in London, United Kingdom, in the Europe region.
How does Prolific make money?
Three revenue lines are on record. Platform fee on participant rewards are the primary driver. The others are managed Services (AI and Research) and domain Expert and AI Tasker premium access.
Who are Prolific's main competitors?
Direct peers on record are Toloka, Surge AI, CloudResearch (formerly TurkPrime) and Respondent.io. Broad incumbents are Appen, UserTesting and Mechanical Turk (Amazon MTurk). Emerging players are Maze, Remesh and Outset.
Does Prolific have an API?
Yes. Prolific offers a REST API, a CLI (prolific-oss/cli), and an MCP server (prolific-mcp) that give programmatic access to its 300,000+ identity-verified participant pool. Developers can launch studies, manage cohorts, retrieve structured responses, subscribe to webhooks (response.submitted, study.completed, submission review events) with signed payloads and exponential-backoff retries, and export JSONL data for direct ingestion into RLHF, DPO, and reward-model training pipelines. API authentication uses API keys scoped to a workspace; study creation supports idempotency keys for safe retry from automated callers. The same 300+ filter attributes are available across UI, CLI, REST API, and MCP. OpenAPI schema, rate limits, and idempotency semantics are documented. Developer documentation is at docs.prolific.com/api-reference/introduction.
What industry is Prolific in?
Prolific's product category is AI Training Data Platform. Its primary akta.pro industry code is MPACALAI, Certification & Credentialed Creator Programs. Its NAICS code is 513210 and its SIC code is 7370.