S3Scanner vs Valence Security: Side-by-Side Comparison (2026)

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

Valence Security: SaaS and AI security platform for posture mgmt, ITDR, and NHI governance. built by Valence Security. Core capabilities include SaaS and AI application discovery, including shadow IT inventory, SaaS Security Posture Management (SSPM) for risk identification and prioritization, AI Security Posture Management (AI-SPM) for AI tool and agent governance..

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

S3Scanner is open-source with 3,022 GitHub stars. Valence Security is developed by Valence Security. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

S3Scanner and Valence Security serve similar Security Scanning use cases: both cover Misconfiguration. Key differences: S3Scanner is Free while Valence Security is Commercial, S3Scanner is open-source. Review the feature comparison above to determine which fits your requirements.