---
title: "Discussion on \"LangChain vs LlamaIndex vs Haystack: What Two Weeks in Production Actually Taught Me\" | Hashnode"
description: "Discussion on \"LangChain vs LlamaIndex vs Haystack: What Two Weeks in Production Actually Taught Me\". I tested all three RAG frameworks against 40k real documents for a client project. Here's what broke, what surprised me, and which one I'm shipping with."
url: "https://hashnode.com/posts/langchain-vs-llamaindex-vs-haystack-building-produ/69af0f91e0c794cd93ded76e"
---

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# [LangChain vs LlamaIndex vs Haystack: What Two Weeks in Production Actually Taught Me](https://synsun.hashnode.dev/langchain-vs-llamaindex-vs-haystack-building-produ?utm_source=hashnode&utm_medium=feed)

I tested all three RAG frameworks against 40k real documents for a client project. Here's what broke, what surprised me, and which one I'm shipping with.

Mar 9 · 8 min read · synsun.hashnode.dev  
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-   [#haystack](https://hashnode.com/tag/haystack)
-   [#langchain](https://hashnode.com/tag/langchain)
-   [#llamaindex](https://hashnode.com/tag/llamaindex)
-   [#llm](https://hashnode.com/tag/llm)
-   [#rag](https://hashnode.com/tag/rag)

## Written by

[Moon Robert](https://hashnode.com/@synsun)

@synsun

  
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