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Prolific logo
Prolific
✓ verifiedPaid

Research participant marketplace that gives AI teams and academics fast access to verified, screened human data and feedback.

21M visits/mo
Outlier AI logo
Outlier AI
✓ verifiedFree

Outlier is a platform where experts earn freelance income training and evaluating AI by writing prompts, rubrics and rating answers.

12M visits/mo
Wirestock logo
Wirestock
✓ verifiedPaid

Marketplace pairing AI labs with ethically sourced, creator-made image and video datasets, alongside freelance content gigs.

290K visits/mo
SourceBae logo
SourceBae
✓ verifiedFree

Marketplace connecting paid domain-expert contractors to AI labs for data labeling, RLHF and model evaluation work.

29K visits/mo
V7 Go logo
V7 Go
✓ verified

V7 AI document processing and data-labeling platform for many industries; established ML-ops brand.

184K visits/mo543 saves
Pricing

No public pricing

No public pricing

No public pricing

No public pricing

No public pricing

Core features
  • 300,000+ verified, screened participants
  • 300+ audience targeting filters
  • Representative and quota-based sampling
  • API and no-code survey tool integrations
  • AI-powered participant quality monitoring (Protocol)
  • Managed services with dedicated project teams
  • Access to vetted domain experts
  • Remote AI-training gig work
  • Tasks: prompt writing, rubrics, rating answers
  • Flexible hours, work from anywhere
  • Weekly, quality-based pay
  • Roles across coding, STEM and languages
  • Free access to paid AI models
  • Large multimodal library spanning images, video, illustration, and vector art
  • Ethically sourced content cleared for AI training use
  • QA-reviewed datasets at scale
  • Custom dataset builds for specific structural needs
  • Freelance project matching based on creator skills
  • Creator earnings and progress dashboard
  • Data annotation and multi-format labeling
  • RLHF and human preference feedback
  • AI model red-teaming and safety testing
  • On-demand vetted ML/prompt engineering talent
  • Synthetic data generation
  • Structured model evaluation and benchmarking
  • Due diligence document automation (CIM analysis, DDQ completion)
  • Portfolio monitoring and reporting
  • Document ingestion and triage
  • Workflow agents and context graphs
  • Document generation and automation
  • API integrations and MCP support
  • Pre-built agent templates
Use cases
  • Collecting human preference data for RLHF or model evaluation
  • Running academic behavioral or market research studies
  • Sourcing domain-expert data for specialized AI benchmarks
  • Earning side income as an AI trainer
  • Contributing expertise to improve AI
  • Flexible remote work for grads and experts
  • Gaining hands-on AI and prompt experience
  • Sourcing licensed visual data to train AI models
  • Requesting custom, structured multimodal datasets
  • Freelancers picking up paid photography, illustration, or design gigs
  • Tracking freelance income and project matches
  • AI labs sourcing domain experts for RLHF projects
  • Companies needing red-teaming of a new model
  • Teams building custom labeled training datasets
  • Domain experts (healthcare, legal, finance) earning remote pay for AI training work
  • Automating financial report processing
  • Legal analysis
  • Insurance claims processing
  • Logistics document management
  • Healthcare records analysis
  • Automating customs forms
  • Video captioning
  • Digital pathology
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