About Langchain
LangChain is one of the most visible frameworks in the LLM application ecosystem. It is commonly used to build retrieval-augmented generation systems, agent-style workflows, tool-using assistants, and other composable AI applications. Its core appeal is that it gives developers reusable primitives for connecting prompts, models, tools, and data sources into larger application flows. Teams often evaluate LangChain when they need a broad ecosystem, quick prototyping velocity, and a framework that can span from simple chains to more elaborate LLM-driven workflows.