# Fusion

> Builder.io’s open-source-inspired framework for building AI-enhanced visual development tools with composable, reactive UIs.

Fusion is a new framework from Builder.io designed to build performant, AI-powered visual development tools. While source-available, it is part of Builder’s commercial platform and supports fine-grained reactivity, high-performance rendering, and custom visual editor creation. Inspired by modern frameworks like React and Solid, Fusion introduces a compiler-driven architecture for fast, composable UIs. It's designed to power internal tools at Builder.io and is now available for developers building visual CMS experiences, embedded editors, and AI-native applications.

## Features
- Composable visual UI framework
- Fine-grained reactivity with high performance
- Optimized rendering via compiler
- Built-in support for visual editing and low-code tools
- Fully typed TypeScript support
- Built for AI-native developer tools

## Platforms
WEB

## Pricing
Freemium — Free tier available with paid upgrades

## Version
0.0.15

## Links
- Website: https://www.builder.io/fusion
- Documentation: https://www.builder.io/fusion/docs
- Repository: https://github.com/BuilderIO/fusion
- EveryDev.ai: https://www.everydev.ai/tools/fusion