Vector Database Showdown: Pinecone vs Weaviate vs Qdrant vs Milvus

Choosing the right vector database for your RAG pipeline. We compare the top 4.

Pinecone

Type: Fully managed cloud

Pricing: Free tier (2GB) + $0.096/GB/month

Latency: <100ms at 1M vectors

Best for: Teams that want zero ops. Set it and forget it.

Weaviate

Type: Open-core, self-hosted or cloud

Pricing: Free (self-hosted) + cloud plans

Latency: <50ms typical

Best for: Hybrid search (vector + keyword), multi-tenant apps

Qdrant

Type: Open-source, self-hosted or cloud

Pricing: Free (self-hosted) + cloud from $25/month

Latency: <20ms at 100K vectors

Best for: Performance-critical applications, on-premise deployment

Milvus

Type: Open-source, cloud-native

Pricing: Free (self-hosted) + Zilliz Cloud

Latency: <10ms at 1M vectors

Best for: Large-scale (>100M vectors), enterprise deployments

Quick Pick

Just getting started: Pinecone (zero setup)

Need hybrid search: Weaviate

Performance-critical: Qdrant

Enterprise scale: Milvus

Newcomers

Mem0: Not a traditional vector DB but an AI-native memory layer built on top. Worth watching for agent use cases.