Baseplate is a Next.js 16 starter kit for building SaaS and AI products faster. It includes Supabase authentication, Stripe payments, Drizzle ORM, OpenAI and Anthropic integrations, AI streaming, rate limiting, credit tracking, and a ready-to-use dashboard. The Pro edition adds RAG and AI agent examples plus advanced UI components. Get the source code through a private GitHub repository and build unlimited personal or commercial products.