Welcome!

Threat Dragon is a free, open-source threat modeling tool from OWASP. It can be used as a standalone desktop app for Windows and MacOS (Linux coming soon) or as a web application. The desktop app is great if you want to try the application without giving it access to your GitHub repos, but if you choose the online version you get to unleash the awesome power of GitHub on your threat models! Obviously, to do this you need to log in first...