Couchbase Database is a popular NoSQL database developed by the Apache Software Foundation. It falls under document-oriented databases, designed for ease of use, scalability, and high availability. It is a NoSQL database that follows document storage where each field is uniquely named and contains values of various data types such as text, number, Boolean, lists, etc.

Database that uses various formats and protocols to store, transfer, and process its data. It uses JSON to store data, JavaScript as its query language using MapReduce, and HTTP for an API. Documents are the primary data unit in CouchDB and include metadata. Document fields are uniquely named and contain values of varying types and there is no set limit to text size or element count. It stores a large amount of data. It replicates data to a local or remote database and synchronizes design documents.