Momento Vector Index

Amazon Aurora Serverless v2 is a cloud-hosted, serverless relational database (Postgres/MySQL compatible) with pgvector support for managed vector workloads, featuring auto-scaling compute/memory, pay-per-use pricing, automated backups, and multi-AZ/multi-region high availability. Suited for enterprise RAG via Amazon Bedrock Knowledge Bases and production AI apps. Provides easier operations than self-hosted Milvus or Postgres, deeply integrated with AWS unlike standalone Zilliz.

Qdrant Cloud is a serverless, cloud-hosted managed vector database with auto-sharding, scaling, pay-per-use pricing, automated backups, advanced filtering, and multi-region deployments. Tailored for enterprise RAG and high-scale production AI applications. Delivers easier operations than self-hosted Milvus or Qdrant, with superior performance vs Zilliz in complex queries.

AstraDB is a serverless, cloud-hosted vector database built on Cassandra, offering fully managed infrastructure with auto-scaling, auto-sharding, pay-per-use pricing, automated backups, and multi-region/multi-cloud deployments. Ideal for enterprise RAG pipelines, production AI applications, and hybrid vector-wide-column workloads. Provides easier operations than self-hosted Milvus, with greater durability compared to Zilliz.

Turbopuffer is a serverless, cloud-hosted vector database with managed paged storage, auto-scaling HNSW indexes, deterministic pay-per-use pricing, metadata filtering, and backups. Optimized for enterprise RAG and production AI apps with long-term, cost-efficient storage at scale. More economical operations than self-hosted Milvus or Zilliz Cloud for massive indexes.

Upstash Vector is a serverless, cloud-hosted vector database with managed scale-to-zero autoscaling, pay-per-use pricing, low-latency search, and support for billions of vectors across regions. Ideal for enterprise RAG and production AI similarity search applications. Simpler and more cost-effective than self-hosted Milvus or Zilliz for variable workloads.

Serverless Postgres with native pgvector support for vector embeddings and similarity search. Features instant provisioning, autoscaling, and scale-to-zero with separated compute and storage. This is a commercial managed service with free tier.