Gravity is a thorough Node.js and React SaaS boilerplate that provides a robust foundation for building profitable SaaS applications. It eliminates the time-consuming, complex boilerplate code, allowing developers to focus on building features that customers will pay for, ultimately saving 400+ coding hours. The boilerplate includes a wide range of pre-built functionality, such as subscription billing, multi-dimensional authentication, UI templates, database integration, REST API, user management, transactional emails, and more.