Many companies cringe at the thought of buying new software. However, effective software does not have to break the budget. Instead, consider open source software for your customer relationship management. Open source software is always free to use, which means it can dramatically cut your costs. Many options for open source CRM are also very versatile. This means you can get the functionality you need from your CRM software without the investment. When making this decision, take some time to find the top open source CRM software. You can use this list to guide you in your CRM software quest. 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.