Each development to the e-learning systems is a profit to the learning model. Most universities work with e-learning system as a main request at their education to automate the managing of learning events to get more flexibility in their learning system. This work compares e-learning systems, our study discuss the basis for choosing the most adequate one. The paper presents the results of the comparison of the most popular e-learning system. The comparison is based on various pedagogical and technical aspects. The open source factor supported the improvement of the e-learning which give great developed communities in many universities. Moodle is the most e-learning management system that has been chosen in many education processes. The article analyses three distance learning environments (Moodle, Blackboard, and Claroline).