LangChain
A Python/JS framework for composing LLM calls, prompts, tools, and memory into end-to-end applications.
LLM & Agent Frameworks Intermediate
Category
LLM & Agent Frameworks
Difficulty
Intermediate
When to use
You need a quick LLM application scaffold with ready-made integrations for vector DBs, document loaders, and LLM providers.
When not to use
You want a small, legible codebase you can fully reason about — LangChain's abstractions get in the way.
Alternatives
LlamaIndex DSPy Haystack Raw SDK calls