Algorithms (HNSW, IVF, ScaNN) that trade a tiny amount of retrieval accuracy for orders-of-magnitude speedups over brute-force nearest-neighbour search.
retrieval
Approximate Nearest Neighbour (ANN)
Related terms
Tools that implement Approximate Nearest Neighbour (ANN)
Pinecone
FeaturedRAG · Hosted vector DB (not an LLM)
8.8
Managed vector database for production-scale similarity search.
Freemium· Free starter; serverless pay-as-you-go from $0.33/1M readsmanaged vector DBproduction RAG
Weaviate
RAG · Hosted vector DB (not an LLM)
8.4
Open-source vector DB with hybrid search and modules.
Freemium· Free open-source; cloud from $25/moself-hosted RAGhybrid search