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Stirling PDF vs PDF Index Generator

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Stirling PDF compared with PDF Index Generator
DetailStirling PDF logo Stirling PDFPDF Index Generator logo PDF Index Generator
What it doesA free, private PDF editor you can run on any infrastructure. AI-powered tool to generate a professional book index in minutes
StageNot given Established
FoundedNot given Not given
Based inUS EG
Pricing modelFreemium Paid
PricingFree: $0/month includes 60+ PDF tools, web/desktop/self-hosted access, open-source editor, and 1,000 monthly credits. Team: $99/month for 100 users, includes everything in Free plus single sign-on, team workspace, and central control. Enterprise: Custom pricing for regulated and air-gapped deploymen $69.95 USD
Key features
  • PDF reader with lightning-fast reading
  • 60+ PDF editing tools
  • OCR to read scanned pages
  • Classification and tagging
  • Signature validation
  • PDF redaction
  • Compression
  • Routing to multiple destinations
  • API for programmatic access
  • Connectors for tool integration
  • AI-powered automatic term extraction from book content
  • Support for 1000+ page documents with consistent speed and precision
  • Multiple output formats including PDF, Word, and plain text
  • Built-in index templates and customizable styling
  • Header, sub-header, and cross-reference handling
  • Clickable hyperlinks in generated indexes
  • Support for multiple languages and international content
  • Password-protected PDF handling
  • Automatic names index generation detecting person names
What makes it different
  • Completely free editor forever with no per-seat licensing
  • Run on any infrastructure with files staying yours
  • Process thousands of PDFs with AI-powered automation
  • Every action logged and recorded for compliance
  • AI understands book content for intelligent term extraction without manual lists
  • Processes 1000+ page books with professional results in minutes
  • Over 10 years of professional indexing expertise behind the tool
  • No Adobe Acrobat or Microsoft Word required to use
Community votes00
DR (Domain Rating by Ahrefs)61 no change since last check30 no change since last check
Trust Flow (Majestic)157
Citation Flow (Majestic)4029
Referring domains (Majestic)872120

6 details filled in for both companies.

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