These days, one of the fastest developing area of business activities is IT outsourcing. That term is widely knowns by all managers in every prominent company. Not long ago it became rather clear, that outsourcing may be 1 of the key factors to develop highly successful business. Because of this, there are many outsourcing companies present on the market these days. The competition is really high – there are plenty of already existing companies, that have pretty big experience already, (for example widely known objectivity ltd), as well as many newly opened, that are doing their best to be successful on the market. Thanks to that though competition, the level of offered activities is greatly high. Nonetheless, it seems to be worth to have a quick look at reasons why outsourcing firms becoming so famous. As a result of this, it may be easier to either decide if it is worth to use such services in a firm.