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Vector Databases for RAG: 7 Powerful Picks Ranked for 2026

Vector database for RAG shown as glowing embedding clusters flowing into a database cylinder

A hands-on ranking of the 7 best vector databases for RAG in 2026 - Qdrant, pgvector, Weaviate, Milvus, Pinecone, Chroma and OpenSearch - with honest scaling limits and a 10-minute decision framework.

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August 12, 2026