Build in chat. Own the code.

From conversation to production-ready app in under an hour.

Describe your product in plain language. Weldr generates a full-stack Next.js app with auth, database, and UI. Keep AI managing the boring parts and take over the code that matters as your team adds custom logic.

  • Chat → live preview → real code in minutes.
  • Choose which layers you keep managed, share with AI, or own entirely.
  • Run self-hosted today; managed cloud is already in development.

We’ll spin up a new Weldr chat, extract your domain model in real time, and generate a live preview you can own.

Preview
chat › describe
// "I need a client portal with projects, tasks, billing, and status updates"
model › generated
entities:
  Project: { status: 'enum<planned,in-progress,done>', budget: 'currency' }
  Task: { dueDate: 'datetime', assignee: 'relation<User>' }
  Invoice: { amount: 'currency', status: 'enum<draft,sent,paid>' }
ownership manifest
surfaces:
  db: managed
  api: extended   # add @custom logic safely
  domain_logic: ejected  # you own it entirely

How it works

Four simple steps to ship your next product without losing control.

  1. 1

    Describe your product in chat

    Weldr extracts entities, relationships, and workflows in real time while you talk it out.

  2. 2

    Review the live preview

    Get a running Next.js app with auth, database, and UI in minutes. Iterate until it matches your intent.

  3. 3

    Choose who owns each layer

    Keep AI managing boilerplate, co-edit APIs with `@custom` blocks, or eject modules you want to own completely.

  4. 4

    Ship self-hosted (and opt into managed when ready)

    Deploy anywhere today. Join the managed waitlist to get automated hosting, audit trails, and compliance tooling when it lands.

After generation
// app/lib/server/actions/tasks.ts
/** @weldr surface: api mode: extended **/

// @weldr:begin crud-task
export async function createTask(input: CreateTaskInput) {
  return db.insert(tasks).values(input);
}
// @weldr:end crud-task

// @custom:begin task-reminders
export async function createTaskWithReminder(input: CreateTaskInput) {
  const task = await createTask(input);
  await notifyAssignee(task);
  return task;
}
// @custom:end task-reminders

Control each layer of your app

AI keeps the scaffolding fresh. You decide when code becomes yours.

Managed

AI keeps it fresh

Schemas, auth, routing, boilerplate. Weldr regenerates these layers safely so you never rewrite CRUD again.

  • Database schema + migrations
  • Auth flows, layouts, CRUD handlers
  • Always in sync with the manifest
Hybrid

Share with AI, keep your logic

Generated code lives in `@weldr` blocks, your additions in `@custom` blocks. Regenerate anytime without losing your work.

  • Server actions with custom hooks
  • UI components with bespoke behavior
  • AST merge keeps human code untouched
Owned (ejected)

Own critical code entirely

Eject layers when you need full control. Weldr generates adapters and validates TypeScript contracts so everything stays compatible.

  • Pricing, billing, domain logic
  • Integrations and performance hotspots
  • Type-safe contracts, never overwritten

Who Weldr is for

Pick the path that matches your role and see how progressive ownership fits your workflow.

Founders & Product Teams

Prototype in chat, launch fast, and keep exportable code without hiring a full engineering team on day one.

Read the founder guide

Engineering Leads

Let AI maintain CRUD, migrations, and UI scaffolds while your team focuses on domain logic and integrations.

Explore the developer playbook

CTOs & Platform Teams

Self-host today for full control. Follow the roadmap for managed hosting, audit trails, and compliance automation.

Review pricing & limits

Why teams pick Weldr

AI speed without losing ownership or compliance.

Time to first app

<1 hour

Chat-spec to live Next.js preview with auth, CRUD, and UI.

Custom code preserved

100%

Your @custom blocks and ejected modules are never overwritten.

Shipping model

MIT license

Self-host anywhere today; opt into managed cloud when ready.

On the roadmap

Managed hosting, audit trails, SOC2 tooling

Weldr ships self-hosted today with full source ownership. Managed cloud, compliance automation, and enterprise integrations are in active development.

Read the roadmapJoin the waitlist →

Start building with progressive ownership today

Run Weldr in your own cloud right now. Be first in line for managed hosting when it launches.

Start FreeRoadmap & waitlist