Your PDFs.
Your control.
Your PDFs.
Your control.
Stirling is the open-source PDF editor and processor for teams of all sizes.
Used by 75% of the Fortune 500
Under 10,000 PDFs
Replace your PDF editor with Stirling for free
GitHub's #1 PDF application with 30m downloads. Lightning-fast reading, editing, and 60+ more PDF operations.
Under 10,000 PDFs
Replace your PDF editor with Stirling for free
GitHub's #1 PDF application with 30m downloads. Lightning-fast reading, editing, and 60+ more PDF operations.
From 10,000-1,000,000 PDFs
Classify, protect, and route every PDF automatically
Process thousands of documents at a time through PDF pipelines. Automate security, compliance, and more without having to open files.
From 10,000-1,000,000 PDFs
Classify, protect, and route every PDF automatically
Process thousands of documents at a time through PDF pipelines. Automate security, compliance, and more without having to open files.
Over 1,000,000 PDFs
Standardize PDF processing for people, servers, and AI
Unify standards for every PDF across the entire organization. Designed for regulated, high-security environments.
Over 1,000,000 PDFs
Standardize PDF processing for people, servers, and AI
Unify standards for every PDF across the entire organization. Designed for regulated, high-security environments.
Take control of your PDF budget
Run Stirling on any infrastructure
From air-gapped bare metal to private cloud VPCs. No upfront commitments, no vendor lock-in.
Deployed in 55K companies
Scarf Analytics, 2026
Military & Defense
Process classified intelligence in air-gapped environments.
Government
Secure citizen data and ensure digital sovereignty for public records.
Healthcare
HIPAA-compliant PDF processing for health systems of all sizes.
Industrials
Protect intellectual property, schematics, and blueprints.
Financial Services
Automate loan processing and KYC with zero data leakage.
Legal Services
Accelerate e-discovery and contract review behind the firewall.
Insurance
Speed up claims adjudication with automated data extraction.
Energy
Manage critical infrastructure docs in remote, offline environments.
Deployed in 55K companies
Scarf Analytics, 2026
Military & Defense
Process classified intelligence in air-gapped environments.
Government
Secure citizen data and ensure digital sovereignty for public records.
Healthcare
HIPAA-compliant PDF processing for health systems of all sizes.
Industrials
Protect intellectual property, schematics, and blueprints.
Financial Services
Automate loan processing and KYC with zero data leakage.
Legal Services
Accelerate e-discovery and contract review behind the firewall.
Insurance
Speed up claims adjudication with automated data extraction.
Energy
Manage critical infrastructure docs in remote, offline environments.
Deployed in 55K companies
Scarf Analytics, 2026
Military & Defense
Process classified intelligence in air-gapped environments.
Government
Secure citizen data and ensure digital sovereignty for public records.
Healthcare
HIPAA-compliant PDF processing for health systems of all sizes.
Industrials
Protect intellectual property, schematics, and blueprints.
Financial Services
Automate loan processing and KYC with zero data leakage.
Legal Services
Accelerate e-discovery and contract review behind the firewall.
Insurance
Speed up claims adjudication with automated data extraction.
Energy
Manage critical infrastructure docs in remote, offline environments.
"This is the one PDF Editor to rule them all! My quest for the perfect PDF editor finally paid off. Meet Stirling PDF, the only PDF editor you will ever need."
Vikash Jhagroe
Sr Technical Adoption Manager at VMware