head to head · open source
langchain vs B
langchain has 148,892 GitHub stars, 25,031 forks, 492 open issues and last shipped yesterday. B has 5,202 stars, 3 forks, 1 open issues and last shipped 4 months ago. langchain leads on adoption by 2,762% (148,892 vs 5,202 stars). langchain is written in Python under MIT; B is written in Python under MIT. langchain has attracted 17% as many forks as stars, B 0%. langchain was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (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 | B | |
|---|---|---|
| GitHub stars | ★ 149K | ★ 5.2K |
| License | MIT | MIT |
| Written in | Python | Python |
| Last push | 2026-11-02 | 2026-07-07 |
| Forks | ⑂ 25K | ⑂ 3 |
| 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 B if
- You want the B feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and B 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 B
─── B ─── The Soul Wired Desktop Companion B is not just an AI : he is a digital lifeform designed to live on your desktop. Built with a soul first architecture, B observes your workflow, listens with neural precision, and interacts through a high performance, glassmorphic overlay. Explore the Vision • Architecture • Getting Started • Contributing • Privacy Demo B in action watch him observe, think, and respond. The Vision Traditional assistants wait for a command. B waits for a moment. B is designed as a proactive desktop companion . Using a 60fps event driven central nervous system, B synchronizes his…
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Frequently asked questions
Is langchain or B more popular?
langchain has 148,892 GitHub stars and B has 5,202. langchain has the larger community by that measure.
Are langchain and B free?
Both are open source. langchain is licensed under MIT and B under MIT. Neither carries a licence fee.
What is the difference between langchain and B?
langchain is written in Python and B 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 B?
Choose langchain if you want the larger community (148,892 stars) or its MIT licence terms. Choose B if its feature set, stack or MIT licence fits better. Both are self-hostable.