Massvai

Massvai is a coding tool that turns a plain-language prompt into a deployable Next.js, Supabase and Vercel app. Massvai is an AI app builder that turns prompts into full-stack Next.js applications wired to Supabase, complete with live preview, GitHub sync, and one-click Vercel deployment.

Massvai is an AI app builder that converts a written product brief into a full-stack Next.js application. The underlying agent plans the build before writing code, scaffolds a TypeScript project, wires up Supabase for authentication and data, and prepares the result for GitHub syncing and a guided Vercel deployment. Rather than producing a static mockup, it outputs a working, inspectable codebase that a team can keep extending after the first generation. The tool is aimed at founders validating a SaaS idea, product teams that need an internal tool without waiting on an engineering queue, agencies turning client briefs into shippable websites, and developers who want a head start on boilerplate rather than a finished replacement for coding. Because every file is exportable, it suits people who care about owning the implementation rather than being locked into a closed visual builder. In practice, a user describes the app, optionally attaching a screenshot or reference file, and the agent plans and writes the Next.js code while a live preview shows progress in real time, including build status, type checks, and the running app. Users can stop or retry steps, inspect generated files such as dashboard pages and Supabase auth wiring, then push the reviewed codebase to GitHub and deploy it to Vercel from within the same flow. Progress and tool history persist across sessions, so a project can be returned to later rather than restarted. Within the AI app builder category, Massvai positions itself between simple no-code website builders and hand-coding a Next.js app from scratch. The emphasis on production-ready TypeScript, a consistent design system, and full code export distinguishes it from tools that only generate throwaway prototypes or keep output trapped inside a proprietary editor.