Pinecone

Pinecone is a managed vector database used by developers to power semantic search, recommendations and retrieval-augmented generation, storing embeddings and returning the most relevant results in milliseconds at large scale. It handles indexing, filtering, namespaces and hybrid keyword-plus-vector search without server management, and integrates with OpenAI, LangChain and LlamaIndex. A free starter tier covers prototypes, with usage-based paid plans for production workloads.