Amazon Detective is priced based on the volume of data ingested from AWS CloudTrail, VPC Flow Logs, and Amazon GuardDuty findings. You are charged Per Gigabyte (GB) ingested per account/region/month. There is no additional charge to enable these log sources for analysis or for data stored in Amazon Detective. Amazon Detective maintains up to a year of aggregated data for its analysis. Amazon Detective is available globally. For a complete list of regions where Amazon Detective is offered, see AWS Region Table.
You can try Amazon Detective at no additional charge with a 30-day free trial. The free trial enables you to get the full Detective feature set over the 30-day period.