head to head · open source
langchain vs browser-harness
langchain has 148,892 GitHub stars, 25,031 forks, 492 open issues and last shipped yesterday. browser-harness has 18,821 stars, 1,858 forks, 353 open issues and last shipped yesterday. langchain leads on adoption by 691% (148,892 vs 18,821 stars). langchain is written in Python under MIT; browser-harness is written in Python under MIT. langchain has attracted 17% as many forks as stars, browser-harness 10%. 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 | browser-harness | |
|---|---|---|
| GitHub stars | ★ 149K | ★ 19K |
| License | MIT | MIT |
| Written in | Python | Python |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 25K | ⑂ 1.9K |
| 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 browser-harness if
- You want the browser-harness feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and browser-harness 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 browser-harness
Browser Harness ♞ Connect an LLM directly to your real browser through one editable CDP websocket. The agent writes missing helpers as it works, so the harness improves with every task. Try browser harness in Browser Use Cloud or paste the setup prompt into your coding agent. You will never use the browser again. See it work Task: "Open my X profile, find my latest 20 video posts, and download them." Setup prompt Paste into Claude Code or Codex: The agent will open chrome://inspect/ remote debugging . On first setup, tick the checkbox so the agent can connect to your browser: How it works install.md connects the…
read the full browser-harness overview →
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Frequently asked questions
Is langchain or browser-harness more popular?
langchain has 148,892 GitHub stars and browser-harness has 18,821. langchain has the larger community by that measure.
Are langchain and browser-harness free?
Both are open source. langchain is licensed under MIT and browser-harness under MIT. Neither carries a licence fee.
What is the difference between langchain and browser-harness?
langchain is written in Python and browser-harness 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 browser-harness?
Choose langchain if you want the larger community (148,892 stars) or its MIT licence terms. Choose browser-harness if its feature set, stack or MIT licence fits better. Both are self-hostable.