LangChain vs Langflow: Build a Simple LLM-App with Code or Drag & Drop

A hands-on guide of the popular framework LangChain and the visual Drag-&Drop-Builder Langflow with Ollama & FAISS

Over the past 5 years as a Salesforce consultant, I’ve collected hundreds of notes from client projects.

Now that I’m about to start a Master’s in Data Science, I wanted to see if I could build a simple LLM chatbot that answers questions based on my own notes.

I’ve worked with LangChain before — but lately, I kept hearing about Langflow.

Thats why I wanted to built the same use case twice: Once with code (LangChain) and once with the visual drag-and-drop builder (Langflow).

Let’s dive in!

Screenshot taken by the author

LangWHAT?

Terms like LangChain, LangGraph, Langflow or LangSmith are popping up everywhere — but what’s really behind them?

In this article, I’ll show you the differences between the four tools and how you can build a simple chatbot with LangChain and Langflow.

The theory follows along the way.

Table of Content
Simple AI chatbot with LangChain vs. Langflow
So, what is LangChain?
And if we don’t want to write any code —…