Our progress

Trusted by millions.
Loved by developers.

We've averaged over a million downloads per month since we launched our company in 2024. We already serve millions of users, tens of thousands of companies, and most Fortune 500 companies. Additionally, we maintain the most popular PDF app on GitHub - Microsoft's platform for open source software.

2014

Year founded

8M+

Downloads

43K

Companies

62%

of the F500

Our team

Meet the team

We're led by engineers from some of the world's leading companies, from Amazon to Discover.

Anthony Stirling

CTO

Matt Joseph

CEO

Reece Browne

Engineering

Connor Yoh

Engineering

Dario Ware

Engineering

Ethan Healy

Engineering

James Brunton

Engineering

Sid Sijbrandij

Lead Investor
Founder & Chairman, GitLab

Testimonials

Meet our community

Business leaders, software developers, and creators around the world share why they trust Stirling.

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“Stirling is the only actively developed open-source web-based PDF editor. It replaces Adobe Acrobat for users that care about privacy and security.”

Sid Sijbrandij

Founder and Chairman, GitLab

“Stirling's vast community on GitHub combined with the speed at which it has developed makes it particularly promising. We're very excited about our investment."

Betty Ma

COO, Open Core Ventures

"The best part is Stirling's features can be used either from the platform or via API, ideal if you are working on a project requiring document processing or PDF generation."

Wassim Samad

Developer, 3D AI Studio

"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, VMware

"Stirling PDF is the ultimate PDF editor. DO NOT use Adobe Acrobat Pro. Use Stirling PDF."

Carlos Melantuche

Sr Network and Infrastructure Engineer, Aramark

“Stirling is the best open-source PDF manipulation tool. The interface is designed to be clear and simple, making it easy for anyone to use.”

Senthilkumar Palani

Editor, OSTechNix

“For those who don’t want to pony up for Adobe’s software or upload their files to sketchy-looking file conversion websites, Stirling PDF is the Swiss Army knife for PDF documents."

Zack Whittaker

Security Editor, TechCrunch

"Here is where Stirling PDF surprised me. It’s far from a basic PDF viewer or a simple converter. Almost every single tool comes with a ton of customization options."

Parth Shah

Tech Writer, XDA Developers

“Every feature [in Stirling] is designed to maximize your productivity while remaining intuitive to use."

Clement Mondary

Agency Director, Groupe Luminess

Show more

“Stirling is the only actively developed open-source web-based PDF editor. It replaces Adobe Acrobat for users that care about privacy and security.”

Sid Sijbrandij

Founder and Chairman, GitLab

“Stirling's vast community on GitHub combined with the speed at which it has developed makes it particularly promising. We're very excited about our investment."

Betty Ma

COO, Open Core Ventures

"The best part is Stirling's features can be used either from the platform or via API, ideal if you are working on a project requiring document processing or PDF generation."

Wassim Samad

Developer, 3D AI Studio

"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, VMware

"Stirling PDF is the ultimate PDF editor. DO NOT use Adobe Acrobat Pro. Use Stirling PDF."

Carlos Melantuche

Sr Network and Infrastructure Engineer, Aramark

“Stirling is the best open-source PDF manipulation tool. The interface is designed to be clear and simple, making it easy for anyone to use.”

Senthilkumar Palani

Editor, OSTechNix

“For those who don’t want to pony up for Adobe’s software or upload their files to sketchy-looking file conversion websites, Stirling PDF is the Swiss Army knife for PDF documents."

Zack Whittaker

Security Editor, TechCrunch

"Here is where Stirling PDF surprised me. It’s far from a basic PDF viewer or a simple converter. Almost every single tool comes with a ton of customization options."

Parth Shah

Tech Writer, XDA Developers

“Every feature [in Stirling] is designed to maximize your productivity while remaining intuitive to use."

Clement Mondary

Agency Director, Groupe Luminess

Show more

“Stirling is the only actively developed open-source web-based PDF editor. It replaces Adobe Acrobat for users that care about privacy and security.”

Sid Sijbrandij

Founder and Chairman, GitLab

“Stirling's vast community on GitHub combined with the speed at which it has developed makes it particularly promising. We're very excited about our investment."

Betty Ma

COO, Open Core Ventures

"The best part is Stirling's features can be used either from the platform or via API, ideal if you are working on a project requiring document processing or PDF generation."

Wassim Samad

Developer, 3D AI Studio