Frameworks

LangChain

The most widely adopted LLM application toolkit — chains, tools, and hundreds of integrations in Python and JavaScript.

As of 1 September 2026, LangChain ranks 1st of 34 in Frameworks on the Agent Reality Index — scored 79.5 of 100, led by market demand.

#179.5Index / 100

Score breakdown

Market demand76
Developer adoption87
Real usage91
Momentum51
Production readiness56
Community64

Why this rank: the index weights market demand most heavily — how much LangChain is actually searched for and asked about inside AI tools.

Real-world demand

91kGoogle searches / mo
1.5kAI / LLM searches / mo
91kProduct-site visits / mo
187kGitHub stars
247716kPackage downloads / mo

Demand measured via Product-site traffic · confidence: high

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Common questions

LangChain — frequently asked questions

What is LangChain?

The most widely adopted LLM application toolkit — chains, tools, and hundreds of integrations in Python and JavaScript. It is tracked in the Frameworks category of the Agent Reality Index.

What is LangChain's Agent Reality Index ranking?

As of 1 September 2026, LangChain ranks 1st of 34 in Frameworks, with an overall Agent Reality Index score of 79.5 of 100.

How is LangChain scored?

The index blends six real-world signals — market demand (weighted most heavily), developer adoption, real usage, momentum, production-readiness, and community — into a 0–100 score, rather than relying on GitHub stars or vendor opinion.

Is LangChain open source?

LangChain is open source; its code is publicly available on GitHub.

How popular is LangChain?

Measured 1 September 2026, LangChain draws about 91k Google searches a month, around 1.5k AI and LLM searches, roughly 187k GitHub stars, about 247716k package downloads a month. Demand confidence is rated high.

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