Business Class Kit is a next-generation Ruby on Rails SaaS template that enables you to build and deploy a startup in a single weekend. It includes essential features like subscriptions using Stripe or Paddle Billing, an SEO-optimized blog with cover images, and a security-hardened single-server deployment with Kamal. The template offers authentication with OTP codes via Devise, team support with roles and invitation systems, and powerful scaffolding tools for generating CRUD operations and admin interfaces with your own styling. Additionally, it provides a built-in admin panel for managing users and teams, allowing you to give out free plans, impersonate users, and write posts directly from the admin.