We are now, simply, Redis
A document database (also called a NoSQL document store) is a non-relational database that stores data as structured documents. It is a modern way to store data in JSON format rather than simple rows and columns. A document can be a PDF, a document, or an XML or JSON file.
RedisJSON is a popular Redis module that provides in-memory manipulation of JSON documents at high velocity and volume. With RedisJSON, you can natively store document data in a hierarchical, tree-like format to scale and query documents efficiently, significantly improving performance over storing and manipulating JSON with Lua and core Redis data structures. The native data type it applies is the Standard ECMA-404, using the Standard JSON Data Interchange Syntax. RedisJSON outperforms any other technique for storing JSON objects in Redis, such as using Lua for manipulating JSON or MessagePack objects.