---
title: "Sarah Connolly (@sarahbconnolly) | Hashnode"
description: "Sarah Connolly (@sarahbconnolly) writes on Hashnode. Read their latest articles and follow their work."
url: "https://hashnode.com/@sarahbconnolly"
---

@sarahbconnolly

# Sarah Connolly

@sarahbconnolly · Joined August 2026

### [LangChain vs. LlamaIndex: Which Should You Use for RAG?](https://sarahbconnolly.hashnode.dev/langchain-vs-llamaindex-which-should-you-use-for-rag?utm_source=hashnode&utm_medium=feed)

My PDF Q&A app was built entirely on LangChain, mostly because that's what the certificate I'm working through teaches. But LangChain isn't the only framework for this — LlamaIndex is the other major

5 min read · [sarahbconnolly.hashnode.dev](https://sarahbconnolly.hashnode.dev/langchain-vs-llamaindex-which-should-you-use-for-rag?utm_source=hashnode&utm_medium=feed)

[Sep 1](https://hashnode.com/posts/langchain-vs-llamaindex-which-should-you-use-for-rag/6a9706b7a54010ada5dc9821)

### [I Built a RAG App That Answers Questions About Any PDF](https://sarahbconnolly.hashnode.dev/i-built-a-rag-app-that-answers-questions-about-any-pdf?utm_source=hashnode&utm_medium=feed)

Build a RAG App using Langchain

10 min read · [sarahbconnolly.hashnode.dev](https://sarahbconnolly.hashnode.dev/i-built-a-rag-app-that-answers-questions-about-any-pdf?utm_source=hashnode&utm_medium=feed)

[Sep 1](https://hashnode.com/posts/i-built-a-rag-app-that-answers-questions-about-any-pdf/6a96d736dab8d706aef59dcd)

### [5 Building Blocks I Learned Building My First LangChain App](https://sarahbconnolly.hashnode.dev/5-building-blocks-i-learned-building-my-first-langchain-app?utm_source=hashnode&utm_medium=feed)

Learn agentic AI, langchain, multi-agent systems

5 min read · [sarahbconnolly.hashnode.dev](https://sarahbconnolly.hashnode.dev/5-building-blocks-i-learned-building-my-first-langchain-app?utm_source=hashnode&utm_medium=feed)

[Aug 27](https://hashnode.com/posts/5-building-blocks-i-learned-building-my-first-langchain-app/6a909633668937c6eed92474)