Chainlit
ActiveDescription
Chainlit is an open-source UI and development framework for LLM and agent chat applications, enabling fast delivery of interactive assistants.
Key Features
- Build production-ready conversational AI UIs with just a few lines of Python
- Built-in step tracing to visualize tool calls and intermediate reasoning
- Integrates with OpenAI, Anthropic, LangChain, LlamaIndex, and other major LLM frameworks
- Ready-to-use components for message feedback, user ratings, and conversation history
- Supports file uploads, multimodal interaction, and custom frontend components
- Fully open-source (Apache 2.0) with active community and rich Cookbook examples
Use Cases
💡 Rapidly build frontend prototypes for LLM chat applications
💡 Create interactive Q&A interfaces for RAG systems
💡 Develop agent chat interfaces with tool call visualization
💡 Build multi-user collaborative AI assistant products
💡 Provide a plug-and-play UI layer for LangChain and other backend frameworks
Categories
Quick Start
1. Install: `pip install chainlit`
2. Verify: `chainlit hello` (should open the hello app in browser)
3. Create demo.py and run `chainlit run demo.py -w` to see the interactive UI