kitio.aiAdded Oct 28, 2026
Chainlit
FreeOpen-source Python framework for building conversational AI apps
What is Chainlit?
Chainlit is an open-source Python library for putting a chat interface on top of your own LLM logic, installed with pip and started with a single command. Developers use it to ship chatbots and copilots quickly without writing a frontend from scratch.
The interface shows intermediate steps of an agent as it works, collects user feedback and supports custom chat components. Apps can be deployed as a standalone web app, an embedded copilot, a FastAPI server, a custom React frontend or a bot for Slack, Discord or Teams.
Authentication covers simple password login and OAuth providers such as GitHub, Google, Azure and Okta. Chainlit ships integrations for OpenAI, Mistral, LangGraph, LlamaIndex and Hugging Face, so it slots into common LLM stacks.
Features
- Chat UI for Python logic
- Agent step visualization
- OAuth authentication
- Slack, Discord and Teams bots
- LangGraph and LlamaIndex support
Tags
Releases
+ Submit new release- Listed
Chainlit was added to the directory.
Organization
Chainlit
Listed by kitio.ai · unverified owner
Pricing
- Pricing model
- Free
- Paid options from
- 100% free
Sponsored
Your AI tool here
A Featured launch puts your tool in this spot and on the home page for a week.
Top Chainlit alternatives
View allCoding
Free open-source editor with built-in AI agents for coding
Coding
Open-source, model-agnostic coding agent for the terminal
Coding
Open-source coding agent for VS Code and the terminal
Coding
Fast Rust code editor with built-in AI agents and edit predictions
If you liked Chainlit
Open-source deep learning library that runs on JAX, PyTorch and TF
FreeModels & APIsMade in United States- MetaflowNew
Open-source Python framework for ML and AI workflows
FreeModels & APIs1 views4 clicks to the website Fast open-source image augmentation library for computer vision
FreemiumData & analyticsType-safe Python agent framework from the Pydantic team
FreeAgents & automationMade in United Kingdom
Pros and cons
Pros
- Free and open source
- Working chat app in a few lines
- Many deployment targets
Cons
- Python only
- Less flexible than a custom frontend
- Advanced UI changes need React work
Prompts & results
No prompts yet. Add your own prompt and output to help others use this tool.
Share a prompt
Reviews
Q&A
What is Chainlit?
Chainlit is an open-source Python library for putting a chat interface on top of your own LLM logic, installed with pip and started with a single command. Developers use it to ship chatbots and copilots quickly without writing a frontend from scratch.
Which LLM frameworks work with Chainlit?
Chainlit has integrations for OpenAI, Mistral, LangGraph, LlamaIndex and Hugging Face, and you can call any other library from your Python code.
Can a Chainlit app run inside Slack or Teams?
Yes. Besides a web app, Chainlit can deploy the same logic as a Slack, Discord or Microsoft Teams bot.
How much does Chainlit cost?
Chainlit is 100% free.
Is there a free version of Chainlit?
Yes. Chainlit is completely free to use.
What are the main features of Chainlit?
Chat UI for Python logic, Agent step visualization, OAuth authentication, Slack, Discord and Teams bots, LangGraph and LlamaIndex support.
Who makes Chainlit?
Chainlit is made by Chainlit.
What are the best alternatives to Chainlit?
Popular alternatives include Visual Studio Code, OpenCode, Cline.