Cascade is a free and open-source SaaS boilerplate designed to accelerate your journey from concept to first sale, supporting growth and scalability. Built on the T3 Stack, it integrates tRPC and Next.js for a robust full-stack experience. The boilerplate includes a technical setup with Next.js, Prisma, PostgreSQL, and TailwindCSS, offering dark/light themes and UI prototyping. It supports authentication via Next Auth, payments through Lemon Squeezy, and background job management with Trigger.dev. Additionally, Cascade features error handling with Sentry, CI/CD via GitHub actions, and visual regression testing. Business tools include a markdown blog, SEO enhancements, email user flows, and analytics with Posthog and Plausible.