Providing temporary use of online, non-downloadable computer software for cost optimization, namely, budget tracking and alerts, spend data analysis and reporting, actionable savings recommendations including automatic optimization of reserved instances or other pre-purchase cloud infrastructure resource options, full cost customization and manipulation, and tagging for inter-departmental chargebacks and invoicing; data security, namely actively monitoring enterprise-scale cloud infrastructure resources to determine if their configurations expose the organization to intentional or unintentional data breaches or hacks, and informing users of risks and possible corrective actions