Various example implementations are directed to circuits, apparatuses, and methods for providing virtual computing services. According to an example embodiment, an apparatus includes a set of computing servers configured to provide a respective set of virtual servers for each of a plurality of accounts. The set of virtual servers for at least one of the accounts includes a voice-over-IP (VoIP) server. The apparatus also includes a processing circuit communicatively coupled to the set of computing servers. For each of the plurality of accounts, the processing circuit provides a graphical user interface (GUI) including a mechanism for an authorized user of the account to select options for reporting usage of the respective set of virtual servers. The processing circuit also monitors use of the respective set of virtual servers for the account and generates invoices for use of the respective set of virtual servers according to the selected options.