Build internal apps with just backend code

Compose is an open-source platform built for backend engineers to create powerful internal apps fast.

import { Compose } from "@composehq/sdk";
import { db, DEFAULT_FEATURE_FLAGS } from "./database";

export default new Compose.App({
  route: "create-user",
  handler: async ({ page, ui }) => {
    page.add(() => ui.header("Create User"));
    page.add(() =>
      ui.form(
        "create-user",
        [
          ui.emailInput("email"),
          ui.selectBox("role", ["user", "manager", "admin"]),
          ui.jsonInput("featureFlags", { initialValue: DEFAULT_FEATURE_FLAGS }),
        ],
        {
          onSubmit: (form) => db.insertUser(form.email, form.role, form.featureFlags),
        }
      )
    );
  },
});

Build in your backend

Full type safety everywhere

Import internal functions and logic

Run in your browser, shareable with your team

Build anything with 40+ UI components

Build in your backend

Install and use the SDK in your codebase

Import your internal functions and logic

Use simple, type-safe SDK methods

import { Compose } from "@composehq/sdk";
import { db, DEFAULT_FEATURE_FLAGS } from "./database";

export default new Compose.App({
  route: "create-user",
  handler: async ({ page, ui }) => {
    page.add(() => ui.header("Create User"));
    page.add(() =>
      ui.form(
        "create-user",
        [
          ui.emailInput("email"),
          ui.selectBox("role", ["user", "manager", "admin"]),
          ui.jsonInput("featureFlags", { initialValue: DEFAULT_FEATURE_FLAGS }),
        ],
        {
          onSubmit: (form) => db.insertUser(form.email, form.role, form.featureFlags),
        }
      )
    );
  },
});

Run in your browser

Use and share with your team

Build anything with 40+ UI components

Responsive, beautiful UIs out of the box

Build in your backend

Install and use the SDK in your codebase

Import your internal functions and logic

Use simple, type-safe SDK methods

import { Compose } from "@composehq/sdk";
import { db, DEFAULT_FEATURE_FLAGS } from "./database";

export default new Compose.App({
  route: "create-user",
  handler: async ({ page, ui }) => {
    page.add(() => ui.header("Create User"));
    page.add(() =>
      ui.form(
        "create-user",
        [
          ui.emailInput("email"),
          ui.selectBox("role", ["user", "manager", "admin"]),
          ui.jsonInput("featureFlags", { initialValue: DEFAULT_FEATURE_FLAGS }),
        ],
        {
          onSubmit: (form) => db.insertUser(form.email, form.role, form.featureFlags),
        }
      )
    );
  },
});

Run in your browser

Use and share with your team

Build anything with 40+ UI components

Create responsive, beautiful UIs out of the box

built a custom data-labeling workflow for thousands of PDFs.

cut their roadmap for operations tools from 4 months to 2 weeks.

manages all their live events using custom tools built with Compose.

40+ ready-to-use UI components

Tables

Charts

Forms

File transfer

PDF previews

JSON editor

One-click share

Theming

Dark mode

Toast notifications

Granular permissions

Audit logs

Loading states

and much more...

Build inside your backend

Build complete tools inside your backend codebase using our SDKs for Node.js and Python, eliminating the need to wire up custom auth and networking.

import { Compose } from "@composehq/sdk";
import { db } from "../db";

const usersDashboard = new Compose.App({
  route: "users-dashboard",
  handler: async ({ page, ui }) => {
    const users = await db.users.selectAll();
    page.add(() => ui.table("users", users))
  }
})

Made for AI-powered development

Use LLMs to generate internal tools in seconds inside your own IDE - integrations are available for Cursor, VSCode, and more.

Simple, transparent pricing

Hobby

Access to everything for one developer. Just start here!

Free forever

Up to 1 user

Unlimited apps

Unlimited environments

Unlimited app executions

Get started

Pro

Upgrade once you're ready to share apps with your team.

$12 per user/month

Unlimited users

Dedicated engineering support

1 year audit logs and analytics history

Role-based permissions

Secure external sharing*

Unlimited apps

Unlimited environments

Unlimited app executions

Get started Talk to an engineer

*External users are billed by app at $7 per user/month.

Join our open-source community

We work in the open. Join the Discord or read the source code.