Why not just use Docker Hub?
Docker Hub stores images. It does not verify them, doesn't tell you what's in them, and doesn't tell you who built them. The consequence: every docker pull nginx is a leap of faith — into a bytestring written by someone you've never met, with no cryptographic record of how it got there.
Flareo rebuilds every module from source in a hermetic environment, generates a CycloneDX SBOM, scans for CVEs, signs with cosign keyless, attests with SLSA provenance, and logs the signature to Rekor. Every claim has a receipt. The two services do different things; we don't compete on catalog size.
Detail at how Flareo compares.