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Stirling PDF vs PDF Converter

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 Converter
DetailStirling PDF logo Stirling PDFPDF Converter logo PDF Converter
What it doesA free, private PDF editor you can run on any infrastructure. Online PDF tools for conversion, merging, compression and OCR with pay-as-you-go credits
StageNot given Not given
FoundedNot given Not given
Based inUS Not given
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 Starter 100 credits, Standard 300 credits, Premium 800 credits. PDF tools, conversions and table extraction cost 2 credits per task. OCR costs 5 credits per task. No subscription, credits never expire while account is active.
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
  • Convert between PDF and Office formats (Word, Excel, PowerPoint)
  • Merge multiple PDFs in order
  • Compress PDF files while preserving quality
  • Encrypt and decrypt PDFs with passwords
  • Add digital signatures to PDFs
  • OCR to recognize text in scanned PDFs
  • Add watermarks and page numbers
  • Extract tables from PDFs to Excel
  • Rotate and repair PDF pages
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
  • Pay-as-you-go credits with no subscription or monthly fees
  • Works entirely in browser with no installation required
  • Files automatically deleted after processing for privacy
  • All transfers encrypted over HTTPS
  • Works on desktop, mobile and web with no software needed
Community votes00
DR (Domain Rating by Ahrefs)63 +1 (up) since last check3 no change since last check
Trust Flow (Majestic)153
Citation Flow (Majestic)4019
Referring domains (Majestic)8727

5 details filled in for both companies.

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