A NoSQL database with strong consistency is Cosmos DB. It lacks a schema, enables SQL-like querying, and even contains JavaScript-written stored procedures, triggers, and UDFs (User Defined Functions). It's Microsoft's response to systems like MongoDB, Cassandra, Couchbase, and others. For at least 99 percent of requests, Cosmos DB promises latencies of fewer than ten milliseconds for reads and less than 15 milliseconds for writes. With that level of performance assurance, Cosmos DB is poised to rule the planet.
For Cosmos DB, Microsoft also supportss.NET, Node.js, Java, and a Python SDK. It is fully managed and operates on Azure. All the data is automatically replicated across any number of global regions. It offers several different consistency levels.