head to head · open source
Langchain-Chatchat vs chatgpt-android
Langchain-Chatchat has 38,643 GitHub stars, 6,266 forks, 26 open issues and last shipped 10 months ago. chatgpt-android has 3,870 stars, 447 forks, 27 open issues and last shipped 9 months ago. Langchain-Chatchat leads on adoption by 899% (38,643 vs 3,870 stars). Langchain-Chatchat is written in Python under Apache-2.0; chatgpt-android is written in Kotlin under Apache-2.0. Langchain-Chatchat has attracted 16% as many forks as stars, chatgpt-android 12%. chatgpt-android was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (chatbot, chatgpt), 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 | chatgpt-android | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 3.9K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Kotlin |
| Last push | 2025-11-10 | 2026-01-03 |
| Forks | ⑂ 6.3K | ⑂ 447 |
| 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 chatgpt-android if
- You want the chatgpt-android feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Kotlin
- You evaluated both and chatgpt-android 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 chatgpt-android
ChatGPT Android is an open source Kotlin sample application that demonstrates OpenAI's ChatGPT chat API on Android inside a chatbot interface built with Jetpack Compose and the Stream Chat SDK for Compose, aimed at Android developers who want a working reference rather than a blank project.
read the full chatgpt-android overview →
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Frequently asked questions
Is Langchain-Chatchat or chatgpt-android more popular?
Langchain-Chatchat has 38,643 GitHub stars and chatgpt-android has 3,870. Langchain-Chatchat has the larger community by that measure.
Are Langchain-Chatchat and chatgpt-android free?
Both are open source. Langchain-Chatchat is licensed under Apache-2.0 and chatgpt-android under Apache-2.0. Neither carries a licence fee.
What is the difference between Langchain-Chatchat and chatgpt-android?
Langchain-Chatchat is written in Python and chatgpt-android in Kotlin. 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 chatgpt-android?
Choose Langchain-Chatchat if you want the larger community (38,643 stars) or its Apache-2.0 licence terms. Choose chatgpt-android if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.