LangChain
LangChain is a framework for building applications powered by large language models (LLMs). It provides tools to connect LLMs to external data sources, manage conversational memory, and create complex chains of operations. Think of it as a construction kit that helps developers build sophisticated AI applications without starting from scratch.
Companies need to build production-ready AI applications that go beyond simple chatbot interfaces, requiring integration with databases, APIs, and business logic. LangChain provides the standardized framework to build these complex applications efficiently, making developers who master it highly valuable for implementing real-world AI solutions.
🎓 Courses
LangChain for LLM Application Development
by Harrison Chase
This short course is taught by LangChain's creator and provides the foundational concepts for building applications with the framework.
Functions, Tools and Agents with LangChain
by Harrison Chase
This course dives into advanced LangChain concepts like agents and tool use, which are critical for building autonomous AI applications.
LangChain: Chat with Your Data
by Harrison Chase
This course focuses specifically on using LangChain for Retrieval-Augmented Generation (RAG), a key use case for enterprise applications.
📖 Books
Generative AI with LangChain: Build large language model (LLM) apps with Python, ChatGPT, and other LLMs
Ben Auffarth · 2023
This book provides comprehensive coverage of LangChain with practical examples for building various types of LLM applications.
LangChain in Action
William F. A. · 2024
This hands-on guide focuses on building real-world applications with LangChain, covering both basic and advanced patterns.
🛠️ Tutorials & Guides
LangChain Documentation & Tutorials
The official documentation is constantly updated and includes comprehensive tutorials for all major LangChain components.
Build a ChatGPT-Powered PDF Assistant with LangChain and Streamlit
This practical tutorial shows how to build a complete RAG application using LangChain, a common interview project requirement.
LangChain Crash Course for Beginners
This free video tutorial provides a quick, practical introduction to LangChain's core concepts with code examples.
Building LLM Applications with LangChain
This in-depth tutorial walks through building multiple types of LangChain applications with clear explanations and code.
LangChain Agents Tutorial
This tutorial focuses specifically on LangChain agents, one of the most powerful and complex components of the framework.
Learning resources last updated: April 13, 2026