Describe the software.
Own the software.

Screens are the easy part. Zone51 builds the rest of the app too: a Postgres database with real tables, email-and-password sign-in, server code that checks who can see what, and a Next.js codebase you can take with you.

Build it →
Postgres databaseSign-in built inYour code to export
The Fieldbook dashboard: revenue, outstanding and overdue totals, a revenue chart and the project pipeline
Fieldbook CRM and invoicing appOpen the live example
What it is

What Zone51 is,
and what it does.

Zone51 is an AI app builder: you describe the software you want in plain English, and it builds a real web app that you can use, publish and keep.

  1. 01

    Describe it

    Who uses it, what they need to keep track of, and what they should be able to do. Plain English is fine.

  2. 02

    Watch it build

    The database, sign-in, screens and server routes are built and checked in front of you, with a live preview you can click through.

  3. 03

    Publish and own it

    Go live on your own link in one click. Export the whole codebase whenever you want.

What you get automatically

  • Sign-inEmail and password accounts, passwords stored as one-way hashes.
  • DatabasePostgres with real tables, designed from what you describe.
  • SecurityProtections that fit your data, and a scan before every publish.
  • HostingOne click puts it live on its own link. Your own domain works too.
  • Code exportThe whole codebase as a .tar.gz, ready to run anywhere.

Full apps get all five. A website or game that needs no accounts skips sign-in and the database.

Full-stack AI app builder

The full-stack AI app builder.
Database and sign-in included.

Built by Zone51 and running right now: real apps it made from a description and published. What you see is footage of the live app, not a mockup. Open any of them and try it.

The Fieldbook dashboard: revenue, outstanding and overdue totals, a revenue chart and the project pipeline
Fieldbook CRM and invoicing appOpen the live example

Clients, projects and invoices for a design studio, with sign-in and a Postgres database behind every screen.

The Tandem overview: members, seats, API calls and a 90-day usage chart for one company
Tandem multi-company SaaSOpen the live example

A team workspace where each company is kept separate, with members, roles, usage and billing screens.

The LUMEN website: a 3D drink can lit like a studio shot, with a gold liquid swirl around it
LUMEN 3D brand websiteOpen the live example

A launch site for a sparkling tonic. The can is a real-time 3D model, and the camera moves around it as you scroll.

Canyon Rally gameplay: a race car on a canyon road at sunset, with a lap timer and speedometer
Canyon Rally 3D racing gameOpen the live example

A third-person racer through a desert canyon at sunset, with physics, shadows, fog, bloom and a full HUD.

More you can build

Real apps, with real
accounts and data.

Four of the apps Zone51 built from a single request during its own security testing. Each one has people signing in and a database behind it.

Team app

A CRM for an agency

Clients, phone numbers, call notes and deals, shared by three teammates who each sign in. Zone51 added the customer-data protections by itself: access checks on every record, an audit log, and ways to export or delete someone's data.

SaaS

A project manager for many companies

Companies sign up, invite admins and members, and run projects, tasks, files and comments. Every table is kept separate per company. In our own attack tests, all 16 attempts to reach another company's data were refused.

AI + uploads

An invoice reader

Upload a PDF invoice or receipt and AI pulls out the vendor, amount, due date and bank details. Uploads are checked before they're stored, and bank numbers are encrypted and shown as the last four digits.

Sensitive data

Patient intake for a clinic

Names, birth dates, insurance IDs and medical history. Zone51 marked the app high-risk, encrypted the most sensitive fields, prepared 2-step sign-in, and said plainly that health-privacy rules may apply.

Included automatically

The parts that usually
take the longest.

A real database

Postgres with tables, relations and migrations, designed from what you describe.

Sign-in & accounts

Email and password sign-in, passwords stored as one-way hashes, sessions that expire.

Private data per person

The server checks who owns each record on every request, not just the screen.

Checks before going live

A security scan runs before every publish and stops it if it finds a critical problem.

Undo anything

Every change is a save point. Jump back to any version.

It's your code

Export the whole codebase whenever you like and run it anywhere. Exporting isn't a paid extra.

FAQ

Questions,
answered.

What does full-stack mean here?

The whole app, not only the screens: the pages people see, the server code behind them, the database that stores the data, and the sign-in that decides who sees what. Zone51 builds all four together from one description.

Which database do the apps use?

Postgres. Zone51 designs the tables and relations from your description and writes the migrations with Drizzle ORM. Each published app gets its own database.

What kind of sign-in do the apps get?

Email and password sign-in built into the app itself: passwords are stored as one-way hashes, sessions expire and can be ended, and repeated wrong guesses are slowed down. Apps that hold sensitive data can get 2-step codes too.

Can I export the code and host it myself?

Yes. Export code downloads the whole codebase as a .tar.gz: a Next.js and TypeScript app with its database migrations and a list of the settings it needs (names only, never your secret values). Zone51 checks the bundle before it hands it over.

Can I use my own keys and services?

Yes. Keys and database addresses you add in the Backend panel are stored encrypted, stay on the server, and are never sent to the AI model.

Get started

Your full-stack app is
one sentence away.

Start building →