The open-source
app builder

Quests builds and runs apps on your computer using any LLM.

Open source on GitHub

See it in action

Build GUIs for CLI tools in seconds

Zero dependencies

No terminal or developer tools required

Try it for free

Runs locally

Private and secure, all apps run on your local computer

Build AI apps

The same AI that powers the agent can be used in your apps

Use any model

Works with the latest models from OpenAI, Anthropic, and more

Open source

Apache 2.0 licensed with a focus on local-first privacy and security

Get started for free

API keys stored locally on your computer
Try Quests for free by downloading the app and signing up
Switch models on the fly

Coding agent

Powerful agentic tool calling like Claude Code and opencode with state-of-the-art performance.

Targeted edits
Real-time linting and error correction
Continuously evolving

Listed filessrc/

Searched textpattern: 'todos'

Wrotesrc/server/rpc/todos.ts

Searched files**/*.ts

Ran diagnosticsFound 3 errors

Editing a filesrc/server/rpc/todos.ts

Best of open source

The personal software you build with Quests is powered by proven open source technologies like React, Vite, Hono, and oRPC.

your-app/

src/

client/

app.tsx

server/

index.ts

package.json

vite.config.ts

Work on multiple apps at once

Projects are isolated and started on demand.

Multi-app runtime

Build and run multiple full-stack applications simultaneously without conflicts

Easy versioning

Quests has built-in version control that's easy to use, letting you try ideas without fear of losing your work

Exportable

Apps built with Quests use industry-standard frameworks and libraries and are easily exportable with a single click

Start building apps locally

It's free, open source, and local. What else do you need?