Open Source Software (OSS) is one of the fastest growing movements towards the less budget and cheaper software. Within the technical development of the world, yet they have seen that OSS will become a viable alternative to proprietary software. The rise of open source software offers the possibility of use of software according to the need and also to modify as per requirements. In this research paper, they describe the various merits and demerits of open source software. Today there is a great need of them to aware about the benefits of the use of open source software.