Buying Guide · 20,000,000 Vectors

20M Vectors · Heavy Storage — Lowest TCO

🏆 Best overall: Qdrant Cloud Managed· runner-up: pgvector on Hetzner VPS (Self-Hosted)

Verified 2026-08-31

Internal knowledge bases are storage-heavy enterprise workloads. Footprint with metadata reaches 20–40GB; dedicated/storage-optimized tiers win.

Cheapest Vector Databases for this Scale

#1 Qdrant Cloud Managed $18.62/mo Visit ↗

#2 pgvector on Hetzner VPS (Self-Hosted) $19.32/mo Visit ↗

#3 Turbopuffer $25.81/mo Visit ↗

#4 Supabase Vector (pgvector) $48.29/mo Visit ↗

#5 AWS RDS PostgreSQL (pgvector) $49.20/mo Visit ↗

#6 Zilliz Cloud (Managed Milvus) $67.33/mo Visit ↗

#7 ClickHouse Cloud $70.30/mo Visit ↗

#8 Pinecone Serverless $72.58/mo Visit ↗