Image-first installation
Provision from OCI-defined machine state, not hand-tuned host mutation.
Design 6 — Vision concept
The Cloud Native OS
Linux, reimagined for fleet operations. Hadron provides the compact, security-first base. Kairos turns that base into a continuous operating system delivery model.
The operating contract
Registry-native upgrades
Distribute upgrades through registries to every environment consistently.
Atomic fallback
Rollback is a first-class primitive, not emergency manual surgery.
BYOI flexibility
Use Hadron by default, or onboard your Linux base with the same lifecycle behavior.
Choose your mission
Start where you are. Keep one operating model.
Download Alternatives
k0s editionPrefer k0s as your Kubernetes distribution? We got your back.Bring Your Own OSKairos Ubuntu, Kairos Fedora, Kairos Alpine and other BYOI paths.Trusted BootThe most secured way to run Kairos when a device includes a TPM.Withouto KubernetesRun Kairos as an immutable Linux framework when your workload does not need Kubernetes.Development imagesBuild and iterate with custom image pipelines and development workflows.
Smaller footprint, stronger baseline security, better operational consistency
Technically, Hadron provides a purpose-built minimal Linux base optimized for immutable deployments, secure boot paths, and efficient image distribution in modern cloud-native operations.
Hadron provides the base. Kairos provides the lifecycle brain.
Hot off the press
How to integrate Kairos architecturally into an edge AI platform
Building secure Kubernetes edge images with Kairos and K0s
Spectro Cloud announces Hadron, a lightweight, security-first Linux base for modern enterprise edge deployments
Kairos on the road
There is nothing planned for the moment but keep checking our events page for news.
Build the next generation of Linux operations
Not another immutable distro. A complete machine lifecycle framework designed for cloud-native reality.
From package drift to image intent
Cloud Native OS fleets stay aligned to promoted image revisions.
From node maintenance to release flow
Build, sign, promote, observe, and recover machines like modern software.
From edge special-casing to one control model
Use the same lifecycle semantics for cloud VMs, datacenter metal, and edge devices.
Join our community
Stay up to date with releases, give and get feedback, and contribute by joining our different community channels.
Enterprise support
Need a hand? For enterprise support, get in touch with companies ready to help you tackle the toughest challenges.
Spectro Cloud is the main supporter behind Kairos and provides enterprise-grade Kubernetes management through its platform, Palette, which allows organizations to deploy, manage, and scale Kubernetes across various environments, including public clouds, data centers, bare metal, and edge computing.