AWS IAM Access Analyzer vs S3Scanner: Side-by-Side Comparison (2026)

AWS IAM Access Analyzer: AWS IAM Access Analyzer is a tool for implementing and maintaining least privilege access in AWS environments through automated analysis and validation of IAM policies and permissions. built by Amazon Web Services, Inc...

S3Scanner: S3Scanner is an open-source tool that scans S3 buckets across S3-compatible APIs to identify misconfigurations and security vulnerabilities..

Both serve the CIEM market but differ in approach, feature depth, and target audience.

AWS IAM Access Analyzer is developed by Amazon Web Services, Inc.. S3Scanner is open-source with 3,022 GitHub stars. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

AWS IAM Access Analyzer and S3Scanner serve similar CIEM use cases: both cover AWS. Key differences: AWS IAM Access Analyzer is Commercial while S3Scanner is Free, S3Scanner is open-source. Review the feature comparison above to determine which fits your requirements.