Since a decade of years there is an extensive evolution noticeable, because new technologies in the internet offer many benefits to new organizational structures. These structures are changing to a much more modern flat hierarchy that don’t need much authorities and encourage more individuality and creativity. So the introduction will provide a short presentation of the evolution from older virtual collaboration techniques to the trend called enterprise 2.0 that is based on the actual key word web 2.0. <br> To provide an overview of the different possibilities for enterprises to offer a virtual collaboration, there will be a determination that includes on the one hand online social network services like Facebook, Twitter, Wikia or Blogger and on the other hand commercial (enterprise) social software like IBM Connections, Microsoft SharePoint or Jive. The next step will be an identification of these tools so it will offer a brief overview of the most important tools that are necessary to collaborate. <br> The aim of this work is a discussion of the impacts of the both types of social media in the main chapter to gain an understanding of the pros or cons that are related to the usage of social media in companies and its information structures. This provides a first step for the leadership to deal with social media for the internal purpose. <br> No scientific paper handled all possible impacts before and to close the gap, this paper is basically a literature review, but it also consists of many other impacts or aspects that have to be considered as well to have a good funding for decisions.