Compare software

Stirling PDF vs Qpdf Tools: catalog facts
Stirling PDF	Qpdf Tools
Freemium Free plan is $0/month with no card required (60+ tools, web/desktop/self-hosted, 500…	Free Free and released into the public domain under the Unlicense.
Windows, macOS, Linux, Web, Self-hosted	Linux
55+ PDF tools covering signing, converting, merging, editing, OCR and redaction, chained in a stateful workspace with… Runs on Docker, bare metal, Kubernetes or as native desktop apps for Windows, macOS and Linux	Compress, split, merge and rotate PDFs Works locally without uploading files
Open-core: SSO, external database, Google Drive integration, SAML and audit logs are gated behind paid Team or… Manual server setup needs Java 25+ plus LibreOffice and Tesseract for conversions and OCR	Covers basic tasks only, no editing or annotation Small project with few contributors
Self-hosted, Downloadable app, Web application, Hosted service	Downloadable app
Open source	Open source
License: MIT	License: Unlicense
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.