head to head · open source
langchain vs contextgem
langchain has 146,538 GitHub stars, 24,504 forks, 492 open issues and last shipped yesterday. contextgem has 2,003 stars, 186 forks, 0 open issues and last shipped 1 months ago. langchain leads on adoption by 7,216% (146,538 vs 2,003 stars). langchain is written in Python under MIT; contextgem is written in Python under Apache-2.0. langchain has attracted 17% as many forks as stars, contextgem 9%. 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, generative-ai), 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 | contextgem | |
|---|---|---|
| GitHub stars | ★ 147K | ★ 2.0K |
| License | MIT | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-09-17 | 2026-08-13 |
| Forks | ⑂ 25K | ⑂ 186 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick langchain if
- You weight community size — 147K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick contextgem if
- You want the contextgem feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and contextgem fits your workflow better
About langchain
LangChain is an open source framework for building agents and LLM powered applications, written in Python and released under the MIT license. It lives in the AI and machine learning ecosystem, specifically among AI development platforms, and it works by chaining together interoperable components and third party integrations so that AI application development becomes simpler. The project describes itself as the agent engineering platform, and its abstractions are designed to keep applications working as the underlying technology evolves.
read the full langchain overview →
About contextgem
ContextGem is a Python project in the AI and machine learning category, specifically for AI development platforms. Its tagline and GitHub description present it as a framework for extracting information from documents with large language models. The project is distributed as the contextgem package on PyPI, supports Python 3.10 through 3.14, and is licensed under Apache 2.0.
read the full contextgem overview →
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Frequently asked questions
Is langchain or contextgem more popular?
langchain has 146,538 GitHub stars and contextgem has 2,003. langchain has the larger community by that measure.
Are langchain and contextgem free?
Both are open source. langchain is licensed under MIT and contextgem under Apache-2.0. Neither carries a licence fee.
What is the difference between langchain and contextgem?
langchain is written in Python and contextgem 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 contextgem?
Choose langchain if you want the larger community (146,538 stars) or its MIT licence terms. Choose contextgem if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.