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Side-by-side features, use cases and pricing — because the right pick depends on your job and budget, not just the ranking.

ChartGen AI logo
ChartGen AI
✓ verifiedFreemium

AI chart generator that turns CSV/Excel data and plain-English prompts into charts, dashboards and reports.

148K visits/mo3.3K saves
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
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
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
PDFgear logo
PDFgear
✓ verifiedFree

Free desktop and web PDF suite for editing, converting, OCR, and signing, with built-in AI chat and summarization.

3.0M visits/mo310 saves
Pricing
Free: $0 (50 charts/mo)
Starter: $10/mo (1,000 credits)
Growth: $25/mo (3,000 credits)
Plus: $50/mo (7,000 credits)
Pro: $100/mo (16,000 credits)

Free trial available

No public pricing

No public pricing

No public pricing

No public pricing

Core features
  • Natural-language chart generation
  • 9+ chart types plus Gantt, mind maps, flowcharts
  • Financial charts (OHLC, candlestick), treemaps, sankey
  • 12 color themes with custom palette picker
  • Data aggregation (sum, average, count, min/max)
  • CSV, Excel, and database connectivity with real-time sync
  • Dashboard publishing and sharing
  • PNG, SVG, PDF export
  • 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
  • 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
  • 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)
  • Edit text, images, and form fields in PDFs
  • Convert between PDF, Word, Excel, PowerPoint, and images
  • OCR with 30+ language support
  • Annotate with highlights, notes, and stamps
  • AI chat and summarization built into the app
  • Cross-device sync across desktop, web, and mobile
Use cases
  • Turn spreadsheets into charts fast
  • Build financial or marketing dashboards
  • Create shareable data visualizations
  • Generate reports without design skills
  • Collecting human preference data for RLHF or model evaluation
  • Running academic behavioral or market research studies
  • Sourcing domain-expert data for specialized AI benchmarks
  • Sourcing AI training and labeled datasets
  • Running surveys and market research
  • Point-of-sale store checks
  • Crowdtesting apps and websites
  • Building training and evaluation datasets
  • Post-training and RLHF for models
  • Benchmarking model capability
  • Training enterprise specialist agents
  • Editing and converting PDFs without paying for Adobe Acrobat
  • Summarizing long PDFs with built-in AI chat
  • OCR-ing scanned documents into editable text
  • Signing documents on desktop or mobile
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