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Labelbox logo
Labelbox
✓ verifiedFreemium

Data-labeling and RL data platform supplying training data, environments and evaluation for frontier AI labs and enterprises.

1.1M visits/mo
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
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
clickworker logo
clickworker
✓ verifiedPaid

Crowdsourcing platform using 8M+ global workers to deliver AI training data, labeling, surveys, testing and store checks.

1.8M visits/mo
Pricing

No public pricing

No public pricing

No public pricing

No public pricing

No public pricing

Core features
  • Data labeling across modalities
  • RL environments and reward signals
  • Custom model evaluations and benchmarks
  • Human preference/annotation from an expert network
  • Recursion RL platform for enterprise agents
  • Robotics data (video, trajectories)
  • 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
  • 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
  • 8M+ verified global crowd
  • AI training data (image/video/audio/text) and annotation
  • Survey tools and respondents
  • Store checks and mystery shopping
  • Crowdtesting (web/app/games)
  • Tagging and categorization
  • Managed or self-service plus API
Use cases
  • Building training and evaluation datasets
  • Post-training and RLHF for models
  • Benchmarking model capability
  • Training enterprise specialist agents
  • 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
  • Automating financial report processing
  • Legal analysis
  • Insurance claims processing
  • Logistics document management
  • Healthcare records analysis
  • Automating customs forms
  • Video captioning
  • Digital pathology
  • Sourcing AI training and labeled datasets
  • Running surveys and market research
  • Point-of-sale store checks
  • Crowdtesting apps and websites
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