Azure Cosmos DB

A globally distributed, multi-model database service designed for sub-10ms latency and 99.999% availability.

Azure Cosmos DB handles massive scale by providing native support for NoSQL engines including MongoDB, Cassandra, and Gremlin. It guarantees single-digit millisecond response times for reads and writes while managing automatic horizontal scaling across 60+ Azure regions. Developers use its five consistency levels (from strong to eventual) to balance performance and data integrity for high-traffic applications like retail catalogs or real-time telemetry systems.

https://learn.microsoft.com/en-us/azure/cosmos-db/