rpCheckup vs s3tk: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
rpCheckup is a free cloud security posture management tool. s3tk is a free cloud security posture management tool. Compare features, ratings, integrations, and community reviews side by side to find the best cloud security posture management fit for your security stack.
CST VerdictBased on our analysis of available product data, here is our conclusion:
AWS teams managing multi-account environments will get immediate value from rpCheckup for resource policy misconfiguration hunting, which most CSPM tools treat as a secondary concern. The tool's free pricing and 162 GitHub stars suggest real adoption among security practitioners who need fast, repeatable policy audits without vendor lock-in. Skip this if you need continuous monitoring and automated remediation; rpCheckup is a point-in-time scanner that works best as a one-time assessment or periodic spot-check in a larger posture program.
DevOps and security teams running S3-heavy AWS environments will get immediate value from s3tk because it's free, open-source, and requires no agent deployment or cloud integration,just point it at your buckets. The 461 GitHub stars and zero setup friction mean you can scan your entire S3 estate for misconfigurations, overpermissioned ACLs, and unencrypted data in minutes, not weeks. Skip this if you need continuous runtime monitoring or policy enforcement across your broader cloud infrastructure; s3tk is a scanner, not a guard rail, and works best as part of a larger CSPM rather than a replacement for one.
