The open-source
app builder
Quests builds and runs apps on your computer using any LLM.
Zero dependencies
No terminal or developer tools required
No sign up
No accounts required, just add your API keys
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
Bring your own key
Use your own API keys with your preferred AI provider.
- API keys stored locally on your computer
- Powers both coding agent and your built apps
- 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
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?