We believe in the power of open source
Transparency is the only way to earn the trust of our community
All Proton apps are open source and have been independently audited and verified by third-party experts. Anyone can see and verify that our apps do what we claim.
Open source enhances the security of our products
Proton's software has been independently audited for security by thousands of experts around the world. You can view the audit reports, inspect the code yourself, or even contribute improvements.
Choose the app you wish to explore
Our contributions to the open-source community