Best AI Frameworks (2026)

Development frameworks and libraries for building LLM-powered applications, including tools for RAG pipelines, agent orchestration, and chain composition.

#1LangChain

mac, windows, linux

Free

LLM application framework
Chain composition
Agent framework

#2LlamaIndex

mac, windows, linux

Free

Data ingestion framework
RAG pipeline builder
Document parsing

Other Categories

AI API Platforms AI Code Editors AI Code Generators Vector Databases