Harbor vs zot
A side-by-side comparison of two self-hosted developer tools & git options — licensing, setup difficulty, resource needs, and what each one replaces.
Harbor
Cloud-native container registry with security
VS
zot
Production-ready vendor-neutral OCI registry
| Feature | Harbor | zot |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 98 · Excellent | 87 · Excellent |
| Category | Developer Tools & Git | Developer Tools & Git |
| License | Apache-2.0 | Apache-2.0 |
| Language | Go | Go |
| Setup difficulty | Medium | Easy |
| Min. RAM | 4,096 MB | 256 MB |
| Deployment | docker, kubernetes, helm | docker, kubernetes, binary |
| GitHub stars | ★ 29,444 | ★ 2,799 |
| First released | 2016 | 2019 |
| Replaces | Docker Hub, Artifactory | Docker Hub, Harbor |
What are Harbor and zot?
Harbor
Harbor is an open-source container registry that secures artifacts with policies, role-based access control, vulnerability scanning, and image signing. It is a CNCF graduated project.
- Private container registry
- Vulnerability scanning
- Image replication
- Role-based access control
zot
zot is an OCI-native container image registry focused exclusively on the OCI spec. It supports image signing, vulnerability scanning, and a web UI for browsing repositories.
- OCI-only registry
- Built-in image scanning
- Web UI included
- Image signing support
Harbor vs zot: key differences
Both projects are written in Go. Zot is the lighter option, starting around 256 MB of RAM against 4,096 MB for Harbor. Harbor is the more established project (first released 2016), while zot arrived in 2019. Harbor has the considerably larger community, at 29,444 GitHub stars versus 2,799.
Why pick each one
Choose Harbor if…
- Built-in vulnerability scanning
- Fine-grained RBAC
- CNCF graduated project
Watch out for
- Many moving components
- Notable resource usage
Choose zot if…
- Released under the Apache-2.0 license
- Easy to set up — beginner-friendly
- First-class Docker support for quick deployment
- Kubernetes-ready with Helm charts available
Frequently asked questions
Is Harbor or zot better?
Neither is universally better. Harbor has the larger community, while zot is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are Harbor and zot free and open-source?
Yes. Harbor is licensed under Apache-2.0 and zot under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Harbor and zot with Docker?
Harbor: yes. zot: yes.
Which is lighter on resources, Harbor or zot?
zot has the smaller minimum footprint at 256 MB of RAM, compared to about 4,096 MB for Harbor. Real-world usage depends on library size, user count, and enabled features.