Free Tutorial
Intermediate
Pinecone · RAG & Retrieval
A free learning hub from a vector database vendor, with high-quality articles on RAG, embeddings, and hybrid search.
Free Tutorial
Beginner
Pinecone · RAG & Retrieval
An illustrated overview of RAG that clearly explains the motivation, pipeline, and common pitfalls of retrieval-augmented generation.
Official Docs
Intermediate
LangChain · RAG & Retrieval
LangChain's official RAG tutorial, with complete runnable code from document splitting to retrieval-based Q&A.
Official Docs
Intermediate
RAGAS · RAG & Retrieval
An open-source evaluation framework built for RAG, offering reference-free metrics like faithfulness and answer relevance.
Open Source Project
Beginner
Chroma · RAG & Retrieval
An open-source vector database known for its simplicity — a few lines of code to embed in your app, ideal for local and small projects.
Open Source Project
Intermediate
pgvector · RAG & Retrieval
A vector similarity extension for PostgreSQL that adds embeddings search to a standard database, with minimal ops overhead.