Stirling PDF vs TronoPDF

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

Stirling PDF compared with TronoPDF
Detail	Stirling PDF	TronoPDF
What it does	A free, private PDF editor you can run on any infrastructure.	Free browser-based PDF and image tools that process files locally on your device
Stage	Not given	Not given
Founded	Not given	Not given
Based in	US	Not given
Pricing model	Freemium	Free
Pricing	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	Not given
Key features	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	Batch file processing
What makes it different	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	Files stay on your device for supported tools Completely free with no hidden costs or paywalls Fast processing with no server uploads
Community votes	0	0
DR (Domain Rating by Ahrefs)	62 +1 (up) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	15	0
Citation Flow (Majestic)	40	12
Referring domains (Majestic)	872	1

4 details filled in for both companies.