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CRI-O

Free#14 of 31 in Container EnginesContainer Runtime Software

CRI-O: A focused, open-source runtime layer for Kubernetes—not an image-building tool. Ranked #14 of 31 in Container Engines by our editors (7.9/10); pricing: Free plan; best for kubernetes-native OCI runtime operations.

7.9/10Editor score
Visit CRI-O
CRI-O7.9 Visit CRI-O

At a glance

  • Editor score
    7.9 / 10
  • Pricing
    Free plan
  • Best for
    Kubernetes-native OCI runtime operations
  • Free plan
    Yes
  • Paid from
    Free
  • Facts checked
    22 Sep 2026
CRI-O screenshot

  • Where it wins

    • Implements Kubernetes CRI with OCI and Docker image support
    • Supports runc, crun, Kata Containers, CNI, and systemd
    • Includes security controls, metrics, tracing, and monitoring support

  • Where it doesn't

    • Does not build, sign, or push container images
    • Focused on Kubernetes runtime operations rather than standalone management
    • Requires Kubernetes and related runtime components for its intended role

Our verdict on CRI-O

CRI-O is an open-source container runtime for Kubernetes environments. It implements the Kubernetes Container Runtime Interface (CRI), connecting kubelet with OCI-compatible runtimes such as runc and crun. The project manages image pulling, registry integration, container layers, filesystem storage, pod networking through CNI, and container monitoring through conmon. It is aimed at teams operating Kubernetes clusters that want a focused runtime layer on Linux rather than a general-purpose container management CLI.

Its strongest fit is the surrounding Kubernetes and OCI ecosystem. CRI-O supports OCI and Docker image formats and integrates with Kubernetes, containers/image, containers/storage, conmon, CNI, systemd, runc, crun, and Kata Containers. The published capabilities also include rootless mode, HTTP status APIs, metrics, tracing, logging, and exit-code handling. Security-related controls cover SELinux, seccomp, capabilities, and other OCI security settings. This combination suits cluster operators who want runtime, storage, networking, observability, and security functions aligned with Kubernetes operations.

CRI-O is intentionally narrow in scope. Its project documentation excludes image building, signing, and pushing, so teams needing an end-to-end image workflow should pair it with separate tooling or choose a product that includes those functions. It is available for Linux distributions including Debian, Raspbian, Ubuntu, Fedora, RHEL, CentOS, openSUSE, and Flatcar, with an API platform option. Choose CRI-O when Kubernetes CRI compatibility and OCI runtime integration are the priority; choose an alternative when standalone container management or integrated image creation is central to the workflow.

Your product? Our editors can test CRI-O in depth and publish a review, labelled as paid · from $149/mo →

CRI-O pricing

Plans Free planFree Free to use — no paid tier required for the core job.
See plans on cri-o.io

CRI-O fact sheet

Free planYes
Paid fromFree
Rootless modeNot verified
Image buildingNo
Kubernetes CRIYes
Windows containersNot verified
Image formatBoth
Runtime interfaceCri-o
Supported host OSLinux; Fedora, RHEL, CentOS, Debian, Raspbian, Ubuntu, openSUSE and Flatcar Container Linux
DeploymentSelf-hosted
PlatformsLinux
SupportCommunity, Docs
Built forMid-market, Enterprise (editorial estimate)
Integrations8 integrations: Kubernetes, kubelet, kubeadm, Minikube, CNI plugins, runc …
PricingFree plan
Websitecri-o.io
Facts checked22 Sep 2026

CRI-O integrations

CRI-O lists 8 integrations on its own site.

  • Kubernetes
  • kubelet
  • kubeadm
  • Minikube
  • CNI plugins
  • runc
  • Kata Containers
  • crun

Alternatives to CRI-O

See all CRI-O alternatives →

Also Ranked In

CRI-O is ranked in 2 of our directories.

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Featured on iTechGuides

Featured on iTechGuides — CRI-O 7.9/10

CRI-O is listed in our Container Engines directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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