Free
$0free100 welcome credits, live preview, code export and community support; no card needed. Official source 1 ↗
Reviewed tool profile
Massvai
AI app builder that turns a prompt into a full-stack Next.js app with live preview, GitHub sync and Vercel deploy.
Sources checked
- Pricing
- A Free plan costs $0 and gives 100 welcome credits with live preview and code export. Builder is $25 a month for 1,500 credits and adds the GitHub and Vercel deploy flow; Pro is $49 a month for 4,000 credits and adds Supabase setup help, version history and priority support. Yearly billing saves 20%. Credits are charged by actual model token usage at per-model rates. Official source 1 ↗
- Available as
- Web app, plus a downloadable macOS app for Apple silicon and Intel Macs; Windows is listed as coming soon. Official source 1 ↗
- Primary group
- Coding & Development
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What it does
Massvai is an AI app builder for Next.js. You describe an app in plain language, optionally with a screenshot or reference file, and its coding agent plans the work, writes a full-stack Next.js project in TypeScript and shows it in a live preview. You can connect Supabase, review and export every file, sync the repository to GitHub and deploy to Vercel from a guided flow. It runs on the web and as a Mac app; a Windows app is listed as coming soon. The site does not name the company behind it.
Official source 1 ↗Features
- Prompt to full-stack Next.js. Describe the product in plain language, with a screenshot or reference file if needed, and the agent builds a Next.js app in TypeScript. Official source 1 ↗
- Long-running coding agent. The agent plans before it builds and keeps progress across long tasks, with tool history and Stop and Retry controls. Official source 1 ↗
- Live preview while it works. Watch and review the app in a live preview before publishing. Official source 1 ↗
- GitHub sync and Vercel deploy. Push the reviewed codebase to GitHub and deploy it to Vercel from one guided flow; Supabase can be connected for auth and data. Official source 1 ↗
- Exportable code. Every file can be inspected and exported, so the project is not locked into Massvai. Official source 1 ↗
Pricing & free limits
Builder
$25per month (yearly saves 20%)1,500 credits a month, live preview and code export, GitHub and Vercel deploy flow, custom preview domains. Official source 1 ↗
Pro
$49per month (yearly saves 20%)4,000 credits a month, everything in Builder plus Supabase setup assistance, version history and restore, and priority support. Official source 1 ↗
Billing details
Credits are charged by actual model token usage, so how far a plan goes depends on the model and the size of the build. Official source 1 ↗
Subscriptions renew automatically monthly or annually through Stripe; cancelling takes effect at the end of the paid period. Official source 1 ↗ · Official source 2 ↗
A first subscription charge can be refunded within 14 days if no more than 10% of that period's credits were used; an unintended renewal within 72 hours if none were used. Official source 1 ↗
Free access & limits
The Free plan has 100 welcome credits rather than a monthly allowance; it includes live preview and code export but not the GitHub and Vercel deploy flow listed on Builder. Official source 1 ↗
Best for & limitations
Build a SaaS MVP with authentication, dashboards, database flows and billing-ready UI. Official source 1 ↗
Turn an operational workflow into an internal full-stack tool. Official source 1 ↗
Take a client brief to a responsive website and deploy it on a production domain. Official source 1 ↗
- Operator not disclosed. The terms, privacy policy and contact page name no company, address or jurisdiction; support is by email only. Official source 1 ↗ · Official source 2 ↗
- Generated code needs your review. The terms warn that AI output can be incomplete, inaccurate or insecure and make you responsible for testing and securing it. Official source 1 ↗
- Next.js, Supabase and Vercel stack. Builds target Next.js and deploy through GitHub and Vercel; other stacks and hosts are not offered. Official source 1 ↗ · Official source 2 ↗
- Usage-based credits are hard to predict. Credits follow model token usage at per-model rates, and promotional credits may expire and are not refundable. Official source 1 ↗ · Official source 2 ↗ · Official source 3 ↗
- Prompts and code go to AI providers. Prompts, source code and attachments may be sent to the AI and infrastructure providers the service uses, which are not named. Official source 1 ↗
- No uptime commitment. No service-level commitment applies unless agreed in writing. Official source 1 ↗
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