Abstract
An ERP system is a system that needs to create integrated solutions in order to manage the bulk of operations inside a company or organization. Also ERP system is a critical and important investment that can affect the overall performance of a company. Open source ERP systems are often targeted when the needs of a company are not fully covered by a standard software edition. In this article we are going to compare and evaluate three main open source ERP systems based on certain criteria. Based on these criteria we will draw a conclusion for the best ERP system that can be used to support the business goals and objectives of an enterprise, and to carry and facilitate the group decision process inside a company.