Some of the services of software companies fall under the service area of IT companies. However, the main difference between software companies and IT companies is that software companies produce, modify or maintain valuable products while IT companies have the task of creating, updating, or maintaining the IT infrastructure. IT companies are companies that make all systems, devices and software work together to help individuals complete tasks. Software companies mainly develop, distribute and maintain software. IT companies encompass any job related to computer operation or development where software is a crucial part.