Harbor
Windmill
| Feature | Harbor | Windmill |
|---|---|---|
| Pricing | Free only | Free / from $10/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.3 / 5 | 4.4 / 5 |
| Best For | enterprise-devops, container-teams, security-teams, regulated-industries | developers, devops-teams, internal-tools, data-pipelines |
| Founded | 2016 | 2022 |
| Container Registry | ✓ | ✗ |
| Vulnerability Scanning | ✓ | ✗ |
| Rbac | ✓ | ✗ |
| Image Signing | ✓ | ✗ |
| Replication | ✓ | ✗ |
| Garbage Collection | ✓ | ✗ |
| Audit Logs | ✓ | ✓ |
| Workflow Editor | ✗ | ✓ |
| Script To Ui | ✗ | ✓ |
| Scheduling | ✗ | ✓ |
| Approval Flows | ✗ | ✓ |
| Multi Language | ✗ | ✓ |
| Self Hostable | ✗ | ✓ |
✓ Harbor Pros
- Completely free and CNCF graduated project
- Built-in vulnerability scanning (Trivy integration)
- Image signing and policy enforcement
- Multi-registry replication for geo-distribution
✗ Harbor Cons
- Requires self-hosting and infrastructure management
- UI is functional but not modern
- Initial setup complexity for production
✓ Windmill Pros
- Open-source and self-hostable
- Supports Python, TypeScript, Go, Bash, SQL natively
- Auto-generates UI from script parameters
- Excellent scheduling and workflow orchestration
✗ Windmill Cons
- Smaller community than Zapier/n8n
- Self-hosting requires infrastructure knowledge
- Less polished documentation for beginners
The Verdict
Harbor is built for enterprise devops and container teams, with a focus on container-registry and vulnerability-scanning. Windmill targets developers and devops teams and leads with workflow-editor and script-to-ui.
Harbor uses custom enterprise pricing, while Windmill starts at $10/mo — a tangible advantage for teams with a fixed budget.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.