LangChain
The OG LLM orchestration framework
AI Agents / Orchestration · OSS/MIT · 148k
Reviewed 2026-08-18 · last push 2026-10-20 · repo checked 2026-10-21
What's Good
LangChain excels at chaining together prompts, tools, and retrievers into coherent workflows. LCEL made composition feel natural after years of callback hell. The integration ecosystem is unmatched: if a vector database or LLM provider exists, LangChain probably has a connector.
The Catch
Abstraction layers add complexity. Simple use cases feel over-engineered, and the learning curve is steeper than rolling your own for basic RAG.
Verdict
Essential for complex LLM apps, overkill for simple ones.
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