Open source is peer reviewed software, which leads to more reliability. The infrastructure of the Internet is largely composed of open-source programs such as DNS, sendmail, Apache and languages such as HTML and Perl. They have proven to be both reliable and robust under the most strenuous conditions, namely the fast growth of the Internet.Low-cost: Open source software is often developed through community forums and collaboratives. Developers volunteer their time and expertise, and are coordinated by fewer paid programmers. The lower overhead costs translates into substantial savings, as does the fact that open source software typically does not have a per-seat licensing cost. According to Gartner, open source is even more attractive to businesses during tough economic times. In its 2009 enterprise software spending forecast, the industry analyst predicts that enterprises seeking to cut costs will be drawn to open source software, virtualization technologies and, because of tighter travel budges, unified messaging and collaboration technologies.
When your business uses proprietary software such as Microsoft Windows and Office, you are on a treadmill that requires you to keep upgrading both software and hardware ad infinitum. Open source software, on the other hand, is typically much less resource-intensive, meaning that you can run it well even on older hardware. It's up to you--not some vendor--to decide when it's time to upgrade.