Cloudability - Cloudability lets you monitor, manage and communicate your cloud costs with one easy tool.
Qualys - Qualys helps your business automate the full spectrum of auditing, compliance and protection of your IT systems and web applications.
Amazon CloudWatch - Amazon CloudWatch is a monitoring service for AWS cloud resources and the applications you run on AWS.
CloudCheckr - CloudCheckr provides security, cost and usage reporting and analytics to help users manage their AWS deployment.
Google Cloud Platform Security Overview - Cloud Workload Protection Platforms
AWS Cost Explorer - Cloud Cost Management