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LangChain

LangChain

Framework for developing LLM-powered applications

LangChain is the most popular framework for building LLM applications with chains, agents, memory, and retrieval. LangSmith adds observability. Controversial for its abstraction complexity.

Panel Reviews

The Builder

The Builder

Developer Perspective

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Over-abstracted and changes too fast. For anything beyond demos, calling APIs directly with a thin wrapper is more maintainable.

The Skeptic

The Skeptic

Reality Check

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The framework that made simple API calls into 500-line abstractions. LangGraph is better but the damage is done.

The Futurist

The Futurist

Big Picture

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Despite the criticism, LangChain's ecosystem (LangSmith, LangGraph, templates) is the most complete platform for LLM apps.