Streamlit is already open source under the Apache-2.0 license — a Python library for turning scripts into shareable data and ML web apps. Snowflake acquired Streamlit in 2022 and now also offers a hosted "Streamlit in Snowflake" product, but the core library itself remains free and self-hostable.
CopilotKit is a different kind of tool: rather than building data-app UIs from Python scripts, it's a React component library for embedding AI copilots into JavaScript/TypeScript applications. The two only overlap if your "data app" is really an AI-assistant interface — otherwise Streamlit remains the natural choice for Python-first dashboards and internal tools.
FAQ
Is there a free, open-source alternative to Streamlit?
Streamlit itself is already open source and free to self-host. CopilotKit is a separate open-source option (MIT-licensed) aimed at AI copilot interfaces rather than general data apps.
What's the best open-source alternative to Streamlit?
For Python-based data apps and dashboards, Streamlit itself remains the standard, since the core library is free and open source outside of Snowflake's hosted offering. CopilotKit only makes sense if you're specifically building an AI-copilot UI in a JS/TS app.
What are the top open-source alternatives to Streamlit?
Browse all open-source alternatives to Streamlit above, or explore the full Developer Tools category for more options.