BuilderKit

BuilderKit is a Next.js and Supabase SaaS boilerplate bundled with 17 pre-built AI apps, landing pages, waitlist pages and an admin dashboard. It targets developers shipping paid generative AI products who want auth, payments and model integrations (GPT-4, Claude, Llama, Whisper, Deepgram) already wired up.

BuilderKit is a Next.js SaaS boilerplate and AI starter kit aimed at developers who want to launch a generative AI product without assembling auth, billing, email and model plumbing from scratch. The purchase gives access to a private GitHub repository and documentation, and the kit is built around TypeScript, Supabase and Stripe, with the marketing claim of saving 40+ hours of setup work. The package is organised as pre-built modules rather than a single template. A NextJS base boilerplate covers the core application shell, while 17 pre-built AI apps provide working examples of common generative features. Landing pages and waitlist pages are bundled in so a project has public-facing surfaces from day one, and an admin dashboard handles the back office view. Model integrations span GPT-4, Whisper, Deepgram, Claude, Llama and Mistral, which means the kit ships wired for both text and voice workloads. In practice a buyer clones the private repo, follows the documentation, and connects their own Supabase project and payment provider. Testimonials on the homepage mention easy switching between Stripe and Lemon Squeezy for payments and between Resend and Loops for email, so the defaults are opinionated but replaceable. The included AI app examples double as reference implementations: a developer can study how streaming, timeouts and provider calls are handled, then adapt that code for their own product. It sits alongside other commercial SaaS starter kits, and its distinguishing pitch is the volume of GenAI examples bundled in relative to price, a point reviewers on the homepage repeatedly raise. That makes it most useful to indie founders and small engineering teams shipping a paid AI tool quickly. Developers who want a fully managed no-code platform, or who prefer a stack other than Next.js and Supabase, will find less value here. The homepage does not publish specific pricing figures, a free trial or support terms, so those details need to be confirmed directly with the vendor. It is a code product, not a hosted application, and buyers should expect to read documentation and configure third-party services themselves.