Massvai

Massvai builds on a stack many web developers already use. The output is an ordinary Next.js project in TypeScript, styled with Tailwind, with Supabase handling authentication and data. You can review every file, push it to your own GitHub repository and deploy it to Vercel, and the site says you can export everything with no lock-in. If you later hire a developer, they start from a familiar codebase.

You start by describing the app in plain language and can attach a screenshot or reference file when the details matter. The agent plans before it writes code and keeps progress across long tasks, with visible tool history plus Stop and Retry controls if it goes the wrong way. A live preview updates as it builds.

The homepage suggests three uses: a SaaS MVP with auth, dashboards and billing-ready screens, internal tools for operational workflows, and client websites for agencies. The dashboard shown on the homepage is labelled as an illustrative preview, not a customer project.

You can use Massvai in the browser or download it for Apple silicon and Intel Macs. A Windows version is listed as coming soon.

The free plan includes 100 welcome credits, live preview and code export. Builder costs $25 a month for 1,500 credits and adds the GitHub and Vercel deploy flow and custom preview domains. Pro is $49 a month for 4,000 credits, Supabase setup help and version history. Yearly billing saves 20%.

The privacy policy says prompts, code and attachments are sent to the AI and infrastructure providers needed to run the workspace, and asks users not to submit secrets or sensitive personal data. A current list of processors is available from Massvai on request. As with any generated code, check authentication and payment logic yourself before real users depend on it.