head to head · open source
langchain vs CowAgent
langchain has 148,892 GitHub stars, 25,031 forks, 492 open issues and last shipped yesterday. CowAgent has 47,754 stars, 10,412 forks, 24 open issues and last shipped yesterday. langchain leads on adoption by 212% (148,892 vs 47,754 stars). langchain is written in Python under MIT; CowAgent is written in Python under MIT. langchain has attracted 17% as many forks as stars, CowAgent 22%. langchain was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai, ai-agents), 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 | CowAgent | |
|---|---|---|
| GitHub stars | ★ 149K | ★ 48K |
| License | MIT | MIT |
| Written in | Python | Python |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 25K | ⑂ 10K |
| 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 CowAgent if
- You want the CowAgent feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and CowAgent 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…
read the full langchain overview →
About CowAgent
[English] [ 中文 ] [ 繁體中文 ] [ 日本語 ] CowAgent is an open source super AI assistant that proactively plans tasks, controls your computer and external services, creates and runs Skills, builds a personal knowledge base and long term memory, forms multi agent teams, and grows alongside you through self evolution — a reference implementation of Agent Harness engineering. CowAgent is lightweight, easy to deploy, and built to extend. Plug in any major LLM provider and run it 24/7 on a personal computer or server, across the web and all major IM platforms. 🌐 Website · 📖 Docs · 🚀 Quick Start · 🧩 Skill Hub · 💻 Download…
read the full CowAgent overview →
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Frequently asked questions
Is langchain or CowAgent more popular?
langchain has 148,892 GitHub stars and CowAgent has 47,754. langchain has the larger community by that measure.
Are langchain and CowAgent free?
Both are open source. langchain is licensed under MIT and CowAgent under MIT. Neither carries a licence fee.
What is the difference between langchain and CowAgent?
langchain is written in Python and CowAgent 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 CowAgent?
Choose langchain if you want the larger community (148,892 stars) or its MIT licence terms. Choose CowAgent if its feature set, stack or MIT licence fits better. Both are self-hostable.