Object-based storage models manage data as objects. They can be implemented at different levels, including the device, system, and interface levels. The object-based storage system uses a flat namespace, which generally maintains identifiers of data and their locations as key-value pairs in the object server. The flat architecture simplifies scaling out object-based storage systems, by providing the option to add extra storage nodes to the system.

There are a number of object-based storage solutions, as follows:

• Amazon S3 (Simple Storage Service) is a cloud-based solution offered by Amazon Web Services (AWS). 
• EMC Atmos is an object-based storage services platform that was developed by the EMC Corporation.
• OpenStack Swift is a scalable, redundant, and distributed object-based storage system that works on the OpenStack cloud platform.