Which Azure service provides a managed NoSQL database option?

Azure Cosmos DB is a fully managed NoSQL database service offered by Microsoft Azure. It is designed to provide high availability, low latency, scalability, and global distribution for applications that require a NoSQL data model. Specifically, it supports various data models, including document, key-value, graph, and column-family, making it highly versatile for different application needs.

One of the key features of Azure Cosmos DB is its multi-model capability, which allows developers to use the most suitable data structure for their applications without being locked into a single data model. Additionally, it offers features such as automatic indexing, comprehensive SLAs, and support for multiple APIs, such as SQL (for document-based data), MongoDB, Cassandra, Gremlin, and Table.

In contrast, Azure SQL Database is a relational database service, which is not classified as NoSQL; Azure Blob Storage and Azure Table Storage are designed for unstructured and structured NoSQL data respectively, but they lack the comprehensive features and data model flexibility that Azure Cosmos DB provides. Therefore, Azure Cosmos DB stands out as the ideal choice for a managed NoSQL database option among the services listed.