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)
WE
Weaviate
RAG · Hosted vector DB (not an LLM)
8.4
Open-source vector DB with hybrid search and modules.
Freemium· Free: $0 · Flex: $45 · Premium: $400self-hosted RAGhybrid search
PI
Pinecone
FeaturedRAG · Hosted vector DB (not an LLM)
8.8
Managed vector database for production-scale similarity search.
Freemium· Starter: Free · Builder: $20/month flat · Standard: $50/month min. usage · Enterprise: $500/month min. usagemanaged vector DBproduction RAG