IT consulting companies provide services to organizations that help them optimize the use of information technology resources to achieve their business objectives. There are many reasons that organizations use consulting companies including to gain objective advice, access to specialized expertise, temporary help for a one-off project or implementation and, in some cases, to outsource their IT services altogether.

There are various types of IT consulting including professional services firms that maintain a large workforce of IT specialists, staffing firms which place IT specialists in a business on a temporary basis to make up a shortfall of staff, independent consultants that are self-employed and offer their services on a contract basis and consultants that provide services in specific areas such as security. While IT consultants can be expensive in the short term the advice they provide can result in improved efficiency and significant long-term cost savings.