Sun Cloud (also known as Network.com) was an on-demand cloud computing service operated by Sun Microsystems prior to Sun's acquisition by Oracle Corporation. The Sun Cloud Compute Utility provided access to a substantial computing resource over the Internet for US$1 per CPU-hour. It was launched as Sun Grid in March 2006—the same month Amazon Web Services began offering their first IT infrastructure services. It was based on and supported open source technologies such as Solaris 10, Sun Grid Engine, and the Java platform.

Sun Cloud delivered enterprise computing power and resources over the Internet, enabling developers, researchers, scientists and businesses to optimize performance, speed time to results, and accelerate innovation without investment in IT infrastructure.

In early 2010 Oracle announced it was discontinuing the Sun Cloud project. Since Sunday, March 7, 2010, the network.com web site has been inaccessible.

A typical application that could run on the Compute Utility fit the following parameters:

Resources are collections of files that contain the user's data and executable.

A job is a Compute Utility concept that defines the elements of the unit of work that is submitted to the Sun Cloud Compute Utility. The major elements of a job include the name of the shell script controlling program execution, required arguments to the shell script, and a list of resources that must be in place for the job to run.

A run is a specific instantiation of a Job description submitted to the Sun Cloud Compute Utility. Runs occur when the job is submitted to the Compute Utility for execution.

For each job one submitted and ran on the Cloud, the Sun Cloud CPU usage was aggregated and then rounded up to the nearest whole hour. For example, if a job used 1,000 CPUs for one minute, it would be aggregated as 1,000 CPU minutes, or 16.67 CPU hours, then rounded up to 17 hours; the job would then be billed as US$17.