What is MagnusBilling? MagnusBilling is a VoIP billing platform launched in 2006, originally a commercial product. Since 2015, it has been released as open source, with the goal of involving the community to “improve even more” the product and provide a complete billing system for the telecom world. It relies on a classic stack: Asterisk for VoIP handling, ExtJS for the frontend, and Yii Framework for the backend. According to their site, the project boasts: