Docker Hardened Images vs CleanStart

Docker Hardened Images are minimal, security-focused container images built to reduce attack surface and improve container security. They are based on Debian and Alpine foundations, ship as minimal production variants with reduced packages and secure defaults, and include supply chain metadata such as SBOMs, Cosign signatures, SLSA Build Level 3 provenance and VEX exploitability context.

Both provide hardened container images with SPDX and CycloneDX SBOMs, Cosign and Sigstore signing, and SLSA Build Level 3 provenance. The core difference is architecture: Docker Hardened Images harden an existing Debian or Alpine base and inherit from upstream distributions, while CleanStart compiles every component from verified source on the CleanStart OS foundation, setting hardening flags at compile time on a custom glibc rather than applying them afterward, through a hermetic build pipeline with verified package-origin enforcement and an AI BOM.

Yes. CleanStart is a strong alternative for teams that need deeper software supply chain assurance. It builds verified images from source with reproducible and hermetic pipelines, inherits nothing from upstream distributions, provides provenance and cryptographic verification, and extends coverage across images, libraries and dependencies rather than container images alone.

Both are secure by design. Docker hardens a known base and adds attestations and signatures. CleanStart removes inherited risk by compiling every component from verified source on a zero-inheritance foundation, setting hardening flags at compile time on a custom glibc, and enforcing verified package origin inside a hermetic build pipeline. Teams that prioritize source-to-artifact verification and hermetic builds generally favor CleanStart's approach.

Both ship STIG-aligned images, CIS Benchmark alignment, per-image compliance labels in the catalog, and compliance artifacts for audit evidence. On FIPS they differ in kind: Docker Hardened Images offer CMVP-validated variants on their Select and Enterprise tiers, while CleanStart ships a FIPS-compliant set. CleanStart pairs that with SBOMs, provenance and an AI BOM, which gives auditors a source-verified evidence trail for regulated environments.

Both reduce effort by shipping minimal images with less to patch, rebuilding continuously when an upstream fix lands, and meeting a seven-day remediation SLA for Critical findings. CleanStart also publishes a 14-day SLA for High, Medium and Low. Its vulnerability intelligence adds exploitability context and verification workflows, reachability-backed VEX evidence, and KEV and EPSS enrichment, so teams spend less time triaging findings that are not reachable in their images.

CleanStart's advantages include a zero-inheritance architecture (no upstream distro risk), a hermetic build pipeline with verified package-origin enforcement, an AI BOM, reachability-backed VEX evidence, reproducible verdict metadata, KEV and EPSS enrichment, a published remediation SLA for High, Medium and Low findings as well as Critical, and supply chain assurance that extends across images, libraries and dependencies.

Both ship signed, attested images with SBOMs and SLSA-aligned provenance that plug into CI/CD gates and admission control. DevSecOps teams that want to verify how every artifact is built from source, reproduce build outcomes, and enforce provenance across images, libraries and dependencies tend to prefer CleanStart's source-to-artifact model.