head to head · open source
Langchain-Chatchat vs AionUi
Langchain-Chatchat has 38,643 GitHub stars, 6,266 forks, 26 open issues and last shipped 10 months ago. AionUi has 32,965 stars, 3,410 forks, 905 open issues and last shipped 11 days ago. Langchain-Chatchat leads on adoption by 17% (38,643 vs 32,965 stars). Langchain-Chatchat is written in Python under Apache-2.0; AionUi is written in TypeScript under Apache-2.0. Langchain-Chatchat has attracted 16% as many forks as stars, AionUi 10%. AionUi was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (chatbot), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Langchain-Chatchat | AionUi | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 33K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | TypeScript |
| Last push | 2025-11-10 | 2026-09-09 |
| Forks | ⑂ 6.3K | ⑂ 3.4K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Langchain-Chatchat if
- You weight community size — 39K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick AionUi if
- You want the AionUi feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and AionUi fits your workflow better
About Langchain-Chatchat
Langchain Chatchat (formerly Langchain ChatGLM) is an open source RAG and Agent application built on the Langchain framework and designed to run against local large language models such as ChatGLM, Qwen, and Llama. It lives in the Python ecosystem, is distributed under the Apache 2.0 license, and is published on PyPI as langchain chatchat . The project targets Chinese language scenarios and open source models specifically, with the stated goal of providing a knowledge base question answering solution that can run entirely offline.
read the full Langchain-Chatchat overview →
About AionUi
AionUi is an open source, cross platform Cowork application that puts AI agents to work alongside the user on their own computer. It is written in TypeScript and released under the Apache 2.0 license, and it lives in the AI agent and chat tooling ecosystem alongside the command line agents it is built to host. Rather than acting as a plain chat client, it runs a built in agent engine that can read and write files, search the web, generate images, and call Model Context Protocol tools, while showing the user every action the agent takes and keeping approval in the user's hands.
read the full AionUi overview →
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Frequently asked questions
Is Langchain-Chatchat or AionUi more popular?
Langchain-Chatchat has 38,643 GitHub stars and AionUi has 32,965. Langchain-Chatchat has the larger community by that measure.
Are Langchain-Chatchat and AionUi free?
Both are open source. Langchain-Chatchat is licensed under Apache-2.0 and AionUi under Apache-2.0. Neither carries a licence fee.
What is the difference between Langchain-Chatchat and AionUi?
Langchain-Chatchat is written in Python and AionUi in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Langchain-Chatchat or AionUi?
Choose Langchain-Chatchat if you want the larger community (38,643 stars) or its Apache-2.0 licence terms. Choose AionUi if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.