Metal³
Metal³: A Kubernetes-native choice for provisioning and managing physical servers. Ranked #5 of 35 in Server Provisioning Software by our editors (8.6/10); pricing: Open source; best for kubernetes-managed bare-metal infrastructure.
At a glance
- Editor score8.6 / 10
- PricingOpen source
- Best forKubernetes-managed bare-metal infrastructure
- Paid fromFree
- Supported operating systemsLinux
- Facts checked20 Sep 2026
Where it wins
- Automates image provisioning, BIOS, RAID, firmware, and disk cleaning
- Connects bare-metal management with Kubernetes Cluster API
- Supports remediation, power control, boot-device management, and rolling upgrades
Where it doesn't
- Designed primarily for physical bare-metal management
- Requires a Kubernetes-centered operating model
- Hardware management relies on OpenStack Ironic and related interfaces
Our verdict on Metal³
Metal³ is an open-source Kubernetes application for enrolling, provisioning, and managing bare-metal machines. It is aimed at teams running on-premises Kubernetes infrastructure, testing environments, and high-performance computing labs. The project uses Kubernetes resources and APIs, with Cluster API integration for Kubernetes cluster deployment and lifecycle operations. It supports Linux and self-hosted environments, and its primary focus is physical server management rather than general-purpose virtual-machine provisioning.
Its strongest differentiator is the breadth of hardware lifecycle operations in one Kubernetes-oriented workflow. Metal³ supports bare-metal host enrollment and inventory discovery, operating-system image provisioning, OCI artifact image deployment, first-boot customization, and automated disk cleaning. It also handles BIOS and RAID configuration, firmware settings and updates, power management, boot-device management, node remediation, and rolling upgrades. Hardware integrations include OpenStack Ironic, Redfish, IPMI, and iDRAC, while Kubernetes and Cluster API provide the surrounding orchestration model.
Metal³ fits organizations that want Kubernetes to manage physical infrastructure through declarative resources and APIs. The open-source model suits teams prepared to operate the project in a self-hosted Linux environment and align their infrastructure processes with Kubernetes and Cluster API. Its narrow focus is also its main boundary: teams seeking a simpler standalone provisioning tool, or a workflow centered on virtual machines rather than physical servers, should consider alternatives. Metal³ is most appropriate when hardware configuration, image deployment, remediation, and cluster lifecycle management need to work together under Kubernetes.
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Metal³ pricing
Metal³ fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Free |
| Supported operating systems | Linux |
| Server types | Both |
| Provisioning method | Image |
| Managed server limit | Not verified |
| Control panel support | Not verified |
| Multi-tenant management | Not verified |
| API access | Yes |
| Deployment | Self-hosted |
| Platforms | Linux |
| Support | Community, Docs |
| Built for | Mid-market, Enterprise (editorial estimate) |
| Integrations | 6 integrations: Kubernetes, Cluster API, OpenStack Ironic, Redfish, IPMI, iDRAC |
| Pricing | Open source |
| Website | metal3.io |
| Facts checked | 20 Sep 2026 |
Metal³ integrations
Metal³ lists 6 integrations on its own site.
- Kubernetes
- Cluster API
- OpenStack Ironic
- Redfish
- IPMI
- iDRAC
Alternatives to Metal³
- ForemanA broad self-hosted platform for provisioning, configuration, patching, and compliance.9.4
- MAASA capable open-source choice for teams managing bare-metal and virtual machine fleets.9.2
- Digital Rebar ProvisionA broad server provisioning platform for complex, multi-site hardware operations.9.1
Metal³ vs the competition
- Metal³ vs Foreman
- Metal³ vs MAAS
- Metal³ vs Digital Rebar Provision
- Metal³ vs OpenStack Ironic
- Metal³ vs Tinkerbell
- Metal³ vs Cobbler
Compare Metal³ with any tool side by side →
Also Ranked In
Metal³ is ranked in 4 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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