We've verified that the organization ProtonVPN controls the domain:
Official ProtonVPN Windows app
C++ 559 105
Official ProtonVPN Android app
C 879 156
Official ProtonVPN iOS and macOS app
Swift 57 16
Official ProtonVPN Linux app
Python 185 27
Official ProtonVPN Linux app (CLI)
Python 149 16
ProtonVPN React web application
Superseded by https://github.com/ProtonVPN/ios-mac-app