• Cost Explorer
• AWS Budgets
• AWS Compute Optimizer

AWS Cost Explorer

• To know where you are spending money
• View last 13 months
• Forecasting based on past usage
• Alarms and budgets

AWS Budgets

You can use AWS Budgets:

• To track and take action on your AWS costs and usage
• To monitor your utilization and coverage metrics for your Reserved Instances (RIs) or Savings Plans

You can create the following types of budgets:

• Cost budgets
• Usage budgets
• Reserved instances
  • utilization budgets (unused or under-utilized alerts)
  • coverage budgets (how much of your instance usage is covered by a reservation)
• Savings Plans
  • utilization budgets
  • coverage budgets

AWS Compute Optimizer

Service that analyzes the configuration and utilization metrics of your AWS resources.
It reports whether your resources are optimal, and generates optimization recommendations to reduce the cost and improve the performance of your workloads.
Compute Optimizer also provides graphs showing recent utilization metric history data, as well as projected utilization for recommendations, which you can use to evaluate which recommendation provides the best price-performance trade-off.

Compute Optimizer generates recommendations for the following resources:

• Amazon EC2 instances
• Amazon EC2 Auto Scaling groups
• Amazon Elastic Block Store (Amazon EBS) volumes
• AWS Lambda functions
• Amazon Elastic Container Service (Amazon ECS) services on AWS Fargate
• Commercial software licenses