Skip to main content

Built by makers, shipped in public

Sign in

PDFops vs PAdES Studio

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 PAdES Studio
DetailPDFops logo PDFops PAdES Studio
What it doesHosted PDF API for filling forms, merging documents and inspecting PDFs Digital PDF signatures for macOS
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
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. Create your first 5 signatures free, then unlock unlimited signing with a one-time purchase
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
  • Keychain signing with support for CryptoTokenKit smart cards
  • Visible signature with optional image, signer name, and signing time
  • RFC 3161 timestamping and long-term validation (LTV)
  • Signature inspection with status, certificate chains, and DSS material review
  • Multiple signatures as independent document revisions
  • Local document processing without server uploads
  • Support for PAdES-B-B, PAdES-B-T, PAdES-B-LT, and PAdES-B-LTA profiles
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
  • Real digital signatures that preserve original PDF bytes, not just image stamps
  • Incremental PDF updates preserve existing signatures as independently verifiable
  • All document processing stays local without server uploads
  • Works with macOS Keychain and supported smart cards without PKCS#11 limitation
  • Verification always unlimited while signing has free tier option
Community votes00
DR (Domain Rating by Ahrefs)16 no change since last check37 no change since last check
Trust Flow (Majestic)197
Citation Flow (Majestic)2816
Referring domains (Majestic)1045

5 details filled in for both companies.

More alternatives to PDFops More alternatives to PAdES Studio

Ask us