head to head · open source
langchain vs codex-keysmith
langchain has 148,851 GitHub stars, 25,018 forks, 492 open issues and last shipped yesterday. codex-keysmith has 4,788 stars, 741 forks, 5 open issues and last shipped 1 months ago. langchain leads on adoption by 3,009% (148,851 vs 4,788 stars). langchain is written in Python under MIT; codex-keysmith is written in Python under MIT. langchain has attracted 17% as many forks as stars, codex-keysmith 15%. langchain was the more recently maintained of the two, and both are self-hostable with no licence fee.
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 | codex-keysmith | |
|---|---|---|
| GitHub stars | ★ 149K | ★ 4.8K |
| License | MIT | MIT |
| Written in | Python | Python |
| Last push | 2026-11-02 | 2026-09-27 |
| Forks | ⑂ 25K | ⑂ 741 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick langchain if
- You weight community size — 149K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick codex-keysmith if
- You want the codex-keysmith feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and codex-keysmith fits your workflow better
About langchain
The agent engineering platform. LangChain is a framework for building agents and LLM powered applications. It helps you chain together interoperable components and third party integrations to simplify AI application development — all while future proofing decisions as the underlying technology evolves. [!TIP] Just getting started? Check out Deep Agents — a higher level package built on LangChain for agents that have built in capabilities for common usage patterns such as planning, subagents, file system usage, and more. Quickstart If you're looking for more advanced customization or agent orchestration, check…
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About codex-keysmith
简体中文 · English · 使用说明 · License codex keysmith 给 Codex 装上一份可撤销的指令。先看计划，确认了再写入。 简体中文 Keysmith 给本机的 AI 编程工具装指令：先预览，再写入，能验证，能撤走。 codex keysmith 面向 Codex 。装上之后，新开的对话会按这份指令工作。不改 Codex 软件本身，也不读取账号和密钥。默认只装一份稿。 [!IMPORTANT] 这会改变该 Codex 配置下 之后新开的对话 。默认只给你看计划，加上确认才会写入。装完后请开一个新任务。 使用方式 1. 先看计划。 确认之前什么都不会写入。 2. 确认后装上。 指令交给本机 Codex，软件保持原样。 3. 新开一轮对话。 关掉旧任务，开一个新的。 4. 随时撤走。 同样先看计划，确认后恢复成原来的样子。 选哪个 Keysmith 每个工具一份安装器。也有未签名桌面版（Apple Silicon / Windows x64）。 开始使用 本机需要已经装好 Codex。稳妥路径是 最新稳定 Release 的单文件脚本（当前公开稳定脚本包括 codex instruct v0.5.1.py ）。也有未签名桌面版。 源码路径： git clone && cd codex keysmith ，再把上述脚本名换成 codex instruct.py 。装完后关掉旧任务，开一个新…
read the full codex-keysmith overview →
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Frequently asked questions
Is langchain or codex-keysmith more popular?
langchain has 148,851 GitHub stars and codex-keysmith has 4,788. langchain has the larger community by that measure.
Are langchain and codex-keysmith free?
Both are open source. langchain is licensed under MIT and codex-keysmith under MIT. Neither carries a licence fee.
What is the difference between langchain and codex-keysmith?
langchain is written in Python and codex-keysmith in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, langchain or codex-keysmith?
Choose langchain if you want the larger community (148,851 stars) or its MIT licence terms. Choose codex-keysmith if its feature set, stack or MIT licence fits better. Both are self-hostable.