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Trow

Free#40 of 61 in Container Registries

Trow: A focused Kubernetes-native registry for image storage, caching, and admission control. Ranked #40 of 61 in Container Registries by our editors (6.0/10); pricing: Open source; best for minimal Kubernetes-native open-source registries.

6.0/10Editor score
Visit Trow
Trow6.0 Visit Trow

At a glance

  • Editor score
    6.0 / 10
  • Pricing
    Open source
  • Best for
    Minimal Kubernetes-native open-source registries
  • Paid from
    None
  • Image scanning
    No
  • Facts checked
    22 Sep 2026
Trow screenshot

  • Where it wins

    • Supports OCI distribution and referrers APIs
    • Caches and proxies images from external registries
    • Adds Kubernetes admission allow and deny lists

  • Where it doesn't

    • Image scanning is not part of the current feature set
    • No replication scope is provided
    • Immutable tags are not supported

Our verdict on Trow

Trow is an open-source, self-hosted container registry built for Kubernetes environments. It stores and serves container images, caches images from external registries, and controls which images can run through a Kubernetes admission webhook with allow and deny lists. Helm-based installation and persistent-volume storage make it a fit for organizations that want a registry running inside their own cluster rather than a broader hosted registry service.

Its strongest case is Kubernetes-native operation with a focused feature set. Trow supports the OCI Distribution Specification, repository and tag listing APIs, tag history tracking, and the OCI referrers API. It integrates with Kubernetes, Helm, Docker, containerd, and CRI-O, giving cluster operators a direct path from registry storage to container runtime workflows. External registry caching can also help keep commonly used images available within the cluster environment.

Trow is a narrower choice than a registry platform centered on supply-chain controls or multi-site distribution. The current feature set does not include image scanning, immutable tags, or replication, while vulnerability scanning and immutable tags are described as planned features. The project is beta software, so teams should consider that status when evaluating it for production-critical workflows. Pick Trow when Kubernetes-native deployment, open-source operation, caching, and admission controls matter most. Choose an alternative when scanning, immutable tags, or replication are required now.

Trow pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.
See plans on trow.io

Trow fact sheet

Free planNot verified
Paid fromNone
Image scanningNo
OCI artifactsYes
Immutable tagsNo
Retention policiesNot verified
Replication scopeNone
Included storageNot verified
Maximum image sizeNot verified
DeploymentSelf-hosted
PlatformsLinux
SupportDocs, Community
Built forSmall business, Mid-market, Enterprise (editorial estimate)
Integrations5 integrations: Kubernetes, Helm, Docker, containerd, CRI-O
PricingOpen source
Websitetrow.io
Facts checked22 Sep 2026

Trow integrations

Trow lists 5 integrations on its own site.

  • Kubernetes
  • Helm
  • Docker
  • containerd
  • CRI-O

Alternatives to Trow

See all Trow alternatives →

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Featured on iTechGuides

Featured on iTechGuides — Trow 6.0/10

Trow is listed in our Container Registries 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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