4 Best Chainlit Alternatives in 2026 (Open Source)
Chainlit — Build Conversational AI in minutes ⚡️. vs Streamlit: purpose-built for conversational AI with step visualization and streaming; vs Gradio: more focused on chat interfaces with built-in auth and conversation management
Short answer
- Closest match to Chainlit: LibreChat.
- Most actively developed: LibreChat (1,199 commits in the last 90 days).
- Fastest growing: LibreChat (+1,611 GitHub stars in the last 30 days).
- No commit in 6+ months: knowledge-gpt, ChatFiles and GPT-Code.
These 4 open-source tools do the same job. They are ordered by how closely they match Chainlit, with live GitHub data so you can see which projects are actively maintained.
| Tool | GitHub stars | Stars / 30d | Last commit | Downloads / 30d |
|---|---|---|---|---|
| Chainlit(original) | 12.5k | +107 | 2026-08-26 | 567.6K |
| LibreChat | 45.2k | +1,611 | 2026-10-01 | — |
| knowledge-gpt | 1.6k | -4 | 2023-09-18 | — |
| ChatFiles | 3.3k | -3 | 2024-12-17 | — |
| GPT-Code | 3.5k | -6 | 2023-07-29 | — |
1. LibreChat
Open-source ChatGPT-like interface for multiple AI models, agents, and sandboxed code execution
What sets it apart: Most feature-complete self-hosted ChatGPT alternative — uniquely combines agents, MCP, code interpreter, image gen, and multi-user auth in one package, unlike single-provider UIs
Best for: Organizations wanting a private, self-hosted ChatGPT replacement; Teams needing multi-user AI platform with access control and audit
2. knowledge-gpt
Accurate answers and instant citations for your documents.
What sets it apart: vs ChatPDF/Unstructured: simple Streamlit-based document Q&A with citation extraction — optimized for quick single-document analysis with verifiable source references
Best for: Extracting cited answers from research papers and reports; Quick document Q&A with source verification; Prototyping RAG-based document analysis tools
3. ChatFiles
Document Chatbot — multiple files. Powered by GPT / Embedding.
What sets it apart: vs ChatPDF/similar tools: open-source Next.js implementation combining LangchainJS with Supabase vector embeddings — fully customizable document chat with Vercel deployment
Best for: Quick document Q&A prototyping with file uploads; Developers learning LangchainJS + Supabase vector search; Building conversational file analysis interfaces
4. GPT-Code
An open source implementation of OpenAI's ChatGPT Code interpreter
What sets it apart: vs ChatGPT Code Interpreter / Open Interpreter: self-hosted open-source web UI for AI code generation and execution — own your data and conversations without ChatGPT Plus subscription
Best for: Self-hosted Code Interpreter alternative; Data analysis and visualization with AI assistance; Document processing and automation scripting
FAQ
- What are the best alternatives to Chainlit?
- The closest open-source alternatives to Chainlit are LibreChat, knowledge-gpt and ChatFiles, followed by GPT-Code. They are ranked by how closely they match what Chainlit does.
- Which Chainlit alternative is the most popular?
- LibreChat has the most GitHub stars among Chainlit alternatives, with 45,212 stars.
- Which Chainlit alternative is the most actively maintained?
- By recent activity, LibreChat (1,199 commits in the last 90 days) is the most actively developed alternative.
Maintain Chainlit or one of these alternatives?
Each tool page has a maintainer box: a README badge with your live rank and stars, or a homepage + category feature for $49 / 7 days.
Chainlit · LibreChat · knowledge-gpt · ChatFiles · GPT-Code