Having an effective CRM tool is essential to staying on top of customer interactions and managing a growing business. The top open source CRM software that made this premium list has all been tested as being easy to use and install. Many of these companies offer helpful user support so that you never miss out on an opportunity to track and manage customer interactions with your business. You cannot go wrong with any of these great options, which all have been ranked according to their ease of use and ability to generate meaningful data to help in providing customer service. The companies below have been reviewed based on a wide range of qualitative and quantitative statistics. In some cases, variable listing fees effect position on this list; however only highly-regarded firms are accepted through our review analysis. Learn more about our ranking process here.