Six Vector Stores for RAG and Where Each One Hurts
Azure AI Search, DocumentDB, Cosmos DB for NoSQL, pgvector, Pinecone and Redis each fail differently in RAG. Where each one hurts in January 2026.
15 articles
Azure AI Search, DocumentDB, Cosmos DB for NoSQL, pgvector, Pinecone and Redis each fail differently in RAG. Where each one hurts in January 2026.
Choosing the right vector database is crucial for RAG applications. After implementing production systems with all three major options in 2025, here's my…
Azure AI Search, Cosmos DB with vector indexing, and Azure Database for PostgreSQL with pgvector each provide vector search capabilities with different…
The best vector database depends on your specific requirements. Azure AI Search excels for hybrid search with integrated semantic ranking. Pinecone offers…
Long-term memory transforms one-shot interactions into ongoing relationships. Users feel understood when the AI remembers their preferences, past issues…
Best for organizations already invested in Azure with hybrid search requirements. Pros: Hybrid search, semantic ranking, enterprise security, managed…
Use retrieved memories to enrich the system prompt or provide context for the AI. This enables personalized responses without requiring the user to repeat…
Vector databases in 2025 are more capable, efficient, and integrated than ever. Choose based on your specific requirements for scale, latency, and…
Azure AI Search, Cosmos DB for NoSQL and PostgreSQL with pgvector can all hold embeddings now. Here is how I decide between a search index and your database.
1. Categorize memories : Different types need different handling 2. Extract automatically : Don't rely on explicit save commands 3. Maintain regularly :…
Run Qdrant 0.11 with Azure OpenAI embeddings: valid point IDs, payload indexes, filtered HNSW search, memory settings, and when Qdrant isn't the right choice.
Run Milvus 2.2 standalone, load Azure OpenAI embeddings with pymilvus, and learn the schema, index, consistency and delete rules before you self-host it.
Run Weaviate 1.17 with embeddings from Azure OpenAI: schema choices, batch imports, filtered vector search, BM25 and the hybrid search caveats to know first.
Set up a Pinecone index for Azure OpenAI embeddings: dimensions, pod types, namespaces, metadata indexing and idempotent upserts, plus when to skip it.
What a vector database adds over brute force: ANN indexes, recall, filtering and updates, and how Pinecone, Weaviate, Milvus, Qdrant and pgvector compare.