Vector Databases

Store and search embeddings at scale

🔑 Key Concepts

Chroma — Lightweight, local, great for prototyping. Zero config. Integrates with LangChain in 3 lines.
Pinecone — Fully managed, scales to billions. Expensive. Good when you don't want to manage infrastructure.
pgvector — PostgreSQL extension. SQL + vector search in one system. Best if you already use Postgres.
Qdrant — Rust-based, fast, open-source. Good balance of performance and features for self-hosted production.

💡 Practice: Try implementing each concept yourself before moving on. Reading about RAG and building RAG are very different things.