Azure Cosmos DB vs Cassandra

Azure Cosmos DB is a globally distributed, multi-model database service by Microsoft offering single-digit millisecond latency and 99.999% availability SLA. It supports document, key-value, graph, and column-family data models with multiple API options.

Apache Cassandra is an open-source distributed NoSQL database designed for handling large amounts of data across commodity servers with high availability and no single point of failure. It uses a masterless ring architecture with tunable consistency.