Compare software

PDF24 Tools vs Stirling PDF: catalog facts
PDF24 Tools	Stirling PDF
Free Free to use and supported by advertising.	Freemium Free plan is $0/month with no card required (60+ tools, web/desktop/self-hosted, 500…
Web, Browser extension	Windows, macOS, Linux, Web, Self-hosted
No registration, limits or watermarks Wide range of PDF tools	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
Files are uploaded to PDF24's servers for processing Shows advertising	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
Web application, Browser extension	Self-hosted, Downloadable app, Web application, Hosted service
Closed source	Open source
License not stated	License: MIT
No account needed	No account needed
Needs internet	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 20, 2026

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