Vector Database Comparison 2026: Chroma vs Qdrant vs Pinecone vs Weaviate

Vector databases are critical for RAG applications in 2026.

Chroma best for quick Python-native prototyping. Qdrant best self-hosted performance with Rust engine. Pinecone leads managed cloud with auto-scaling. Weaviate offers hybrid vector+keyword search. Milvus best for billion-scale deployments.