Jumpstart is a SaaS boilerplate built on Ruby on Rails, providing entrepreneurs, managing directors, and software developers a head start in developing their own SaaS applications. It includes a pre-configured subscription billing system, multi-tenant user accounts, and a set of customizable templates for common SaaS features such as authentication, billing, and user management. Jumpstart allows developers to focus on the unique features of their application instead of spending time building out these common features from scratch. With Jumpstart, you can launch your SaaS application quickly and efficiently, reducing time to market and development costs.