Cloudzy

Cloudzy offers two account plans, Free and Paid. 

Free:

The free plan can be used when connected to AWS accounts with up to $2,500 month is usage. The $2,500 total is calculated in aggregate across all connected AWS account. When you have multiple connected accounts that total more than $2,500 of monthly AWS billing, then your account moves to the paid plan. 

Paid: 

Cloudzy paid plans are billed at 1% of your total AWS monthly spend, across all connected accounts, and is calculated on the last day of the month. Cloudzy calculates AWS account billing by adding an entry within "AWS Budgets" to track cloud usage and billing on your connected accounts. Accounts are billed the first week of the month, and use billing info and spend collected from the previous month. Charges will vary month to month depending on your billed AWS usage. 

Example Billing: 

In the example below, the monthly charges for Cloudzy would be $210