Amazon Guard Duty - Malware Protection for Amazon S3 Free Tier

All existing AWS accounts are eligible to use the 12-month Free Tier for this feature that starts from June 11, 2024 and ends on June 11, 2025. This extended 12-month Free Tier for your account applies to using Malware Protection for S3, and no other AWS service or another GuardDuty feature.

If an existing AWS account starts using Malware Protection for S3 after June 11, 2025 or after the 12-month Free Tier of the account ends, then you will start incurring the associated usage cost.

Pricing and usage cost for Malware Protection

For Amazon GuardDuty Malware Protection for Amazon S3, the Free Tier offer applies in all AWS Regions where GuardDuty is available, including GovCloud (US) Regions.

New AWS accounts, including new member accounts of an AWS Organization, will receive 1,000 free requests and 1GB free each month for the first 12 months after account creation.

Existing AWS accounts, including existing member accounts of an AWS Organization, are eligible to participate in the Free Tier until June 11, 2025. During this period, accounts with the Malware Protection for S3 feature enabled will receive 1,000 requests and 1GB free each month.

This Free Tier applies to every account in every Region where the feature is enabled. After the Free Tier period concludes, standard pricing will apply based on the GB volume of objects scanned and the number of objects evaluated per month.
Sources
Intelligent Threat Detection – Amazon GuardDuty Pricing – AWS
Introducing Amazon GuardDuty Malware Protection for Amazon S3 | AWS News Blog