Bullet Train is an open-source Ruby on Rails framework aimed at expediting SaaS application development. It includes comprehensive pre-built features such as user authentication, team management, roles and permissions, form libraries, and a Tailwind CSS theme.
Additionally, it provides a JSON REST API and uses tools like esbuild and PostCSS for efficient front-end asset management.
The framework is designed to save developers significant time by offering production-ready scaffolding and functionalities, making it easier to focus on building unique aspects of their applications.