Stefan Zhelev

Data Professional

Artifact Registry

A private registry under platform control for the container images and artifacts everything else runs from. It matters for both reliability and supply-chain security — storing images close to the cluster, scanning them for vulnerabilities, and signing them for provenance — instead of depending on a public registry's availability or rate limits.

Open Source Alternatives

Harbor — 9 / 10

Self-hosted CNCF graduated registry with Trivy scanning, Cosign signature support, retention policies, replication, and a proper UI. The only OSS option that competes feature-for-feature with managed cloud registries. Operational footprint is real but justified.

Zot — 7 / 10

Minimalist OCI registry. OSS, lighter than Harbor, fewer features. Right for very small or edge deployments.

Docker Distribution — 5 / 10

The reference OCI registry implementation. Bare-bones, no UI or scanning. Building block, not a product.

Quay (OSS) — 7 / 10

Red Hat-built OSS registry. Less actively evolving than Harbor; reasonable in Red Hat-aligned shops.

Managed SaaS Alternatives

GitHub Container Registry (GHCR) — 8 / 10

Bundled with GitHub. Free for public repos, integrated with GitHub Actions. Limited governance and not self-hosted; convenient when GitHub is the source of truth.

Amazon ECR — 8 / 10

AWS-managed registry. Excellent inside AWS; locked to AWS for IAM. Strong for AWS-native workloads.

JFrog Artifactory — 9 / 10

Enterprise multi-format artifact platform — containers, Maven, npm, generic. Premium pricing, deep enterprise feature set.

GitLab Registry — 7 / 10

Bundled with GitLab. Convenient if GitLab is the forge; less feature-rich than Harbor.

Docker Hub — 7 / 10

Public-first registry. Free tier rate-limited, less control. Useful for public images; weak for private platform use.

Quay.io — 7 / 10

Red Hat-hosted Quay. Convenient in Red Hat shops.

Google Artifact Registry (GAR) — 8 / 10

GCP-native registry. Strong inside GCP; locked to it.

Azure Container Registry (ACR) — 8 / 10

Azure-native registry. Same notes as ECR / GAR for Azure-locked workloads.

Harbor Cloud (various vendors) — 8 / 10

Managed Harbor hosting from third parties. Same OSS technical model, hosted.

Scoring summary

Tool	Score	Type	Best for
Harbor	9	OSS	Self-hosted OSS registry
Artifactory	9	SaaS	Enterprise multi-format artifacts
GHCR	8	SaaS	GitHub-native, public repos
ECR	8	SaaS	AWS-native
GAR	8	SaaS	GCP-native
ACR	8	SaaS	Azure-native
Harbor Cloud	8	SaaS	Managed Harbor
GitLab Registry	7	SaaS	GitLab-bundled
Docker Hub	7	SaaS	Public images
Quay.io	7	SaaS	Red Hat-aligned
Quay (OSS)	7	OSS	Red Hat-aligned self-hosted
Zot	7	OSS	Minimalist OCI
Docker Distribution	5	OSS	Reference implementation