Batman is a one-time purchase, production-ready SaaS boilerplate that gives you a full modern stack (Next.js, React 19, TypeScript, Prisma, PostgreSQL, Tailwind, shadcn/ui, Better Auth, Polar payments, Supabase, Resend) with auth, subscriptions, admin and user dashboards, storage, blog/CMS, notifications, and a guided Setup Wizard so you can go live and let AI tools build features on top in hours.