FAISS: a library for fast ANN search — no persistence, no metadata filtering, bare-bones, full control.

FAISS: a library for fast ANN search — no persistence, no metadata filtering, bare-bones, full control. Ideal for high-performance custom pipelines. ChromaDB: a full vector DB with persistence, metadata filtering, collections, Python-native API. Easier to prototype with. For production scale: Pinecone, Weaviate, or OpenSearch with k-NN. FAISS used when you embed it into a custom pipeline.