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PDFops vs Stirling PDF

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

PDFops compared with Stirling PDF
DetailPDFops logo PDFopsStirling PDF logo Stirling PDF
What it doesHosted PDF API for filling forms, merging documents and inspecting PDFs A free, private PDF editor you can run on any infrastructure.
StageNot given Not given
FoundedNot given Not given
Based inNot given US
Pricing modelFreemium Freemium
PricingAnonymous trial: 100 requests/month/IP free, no signup. Free plan: 250 requests/month with API key ($0). Indie: 4,000 requests/month at $16/month. Pro: 25,000 requests/month at $79/month. Enterprise: custom volume and SLA. Free: $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
Key features
  • Fill PDF form fields via HTTP API
  • Merge multiple PDFs into one
  • Sub-100ms response times globally
  • MCP server for AI agents
  • Verified n8n community node
  • Python client with zero dependencies
  • Inspect PDF form fields
  • Generate invoices from JSON
  • Usage dashboard and quota endpoint
  • Only successful calls count against quota
  • 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
What makes it different
  • ~10× cheaper than DocRaptor, PDFShift, and PDFMonkey
  • No per-MB render tax or compute-second surprises
  • Globally distributed with sub-100ms response times
  • Deterministic, byte-identical output every time
  • Hard caps mean no surprise billing
  • 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
Community votes00
DR (Domain Rating by Ahrefs)16 no change since last check61 no change since last check
Trust Flow (Majestic)1915
Citation Flow (Majestic)2840
Referring domains (Majestic)104872

5 details filled in for both companies.

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