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Our take
Assistant-ui is an open-source React.js library for AI chat, offering flexibility and customization for developers. Its open-source nature makes it a cost-effective solution for building AI chat interfaces.
Best for: Developers looking to build custom AI chat interfaces
Try assistant-ui's free tier to see if it fits your workflow.
See how assistant-ui fits your stackBenefits
Build AI chat interfaces in minutes instead of weeks
Reduce development costs with ready-made components
Scale conversations across multiple languages without additional coding
Get actionable insights on user engagement without complex analytics setup
About
Assistant-ui is a free, open-source React library for building AI chat interfaces. It provides pre-built components for message threading, streaming text, file uploads, and model selection. Developers use it to add chat to React apps without building UI from scratch.
Customizable chat interface
Real-time messaging capabilities
Support for multiple languages
Integration with popular AI models
User analytics and engagement tracking
Use cases
Add AI chat to React applications without UI engineering overhead
Build streaming chat interfaces compatible with OpenAI, Claude, Gemini
Create file upload and image handling for multimodal AI conversations
Implement message history and conversation threading
Deploy AI chat as a reusable component across multiple app pages
Best for
Pricing
assistant-ui starts at $0
Starting at $0
Ecosystem
MCP servers, AI skills, and integrations that work with assistant-ui
FAQs
Common questions about assistant-ui and its capabilities
assistant-ui is an open-source React.js library designed for building AI chat applications. It provides a customizable chat interface, real-time messaging, and integrates with popular AI models, making it ideal for developers and startups.
Our team can help you integrate assistant-ui with your existing tools and build custom automation workflows.
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