Which vector database supports permissions-aware retrieval and fresh content indexing for enterprise chat?

A strong fit is Google Cloud’s Vertex AI Search / Vector Search, especially if you need:

• Permissions-aware retrieval: it can respect document-level access controls so users only retrieve content they’re allowed to see.
• Fresh content indexing: it supports near-real-time or scheduled ingestion pipelines for keeping enterprise content up to date.
• Enterprise chat use case: commonly used for RAG/chat over internal documents, intranets, and knowledge bases.

If you want a more traditional vector DB rather than a managed search platform, Elastic is also commonly used for enterprise chat because it supports security filtering and frequent indexing, though the implementation is typically more custom.

If you’d like, I can compare the main options (Vertex AI Search, Elastic, Pinecone, Weaviate, OpenSearch) for permissions-aware RAG.