Fri. Feb 13th, 2026

AWS Bedrock Knowledge Bases: Comparing S3 Vector Store, OpenSearch, PostgreSQL, and Neptune for Cost and Performance


Since July 15, 2025, AWS has added support for S3 vector stores for Bedrock knowledge bases, allowing for seamless storage and retrieval of embeddings for RAG workflows. Currently, it supports multiple stores:

AWS-Managed Non AWS-Managed
OpenSearch MongoDB Atlas
S3 vector store Pinecone
PostgreSQL Redis Enterprise Cloud
Neptune

By uttu

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