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Kraken

Free#49 of 61 in Container Registries

Kraken: A self-hosted registry focused on peer-to-peer Docker blob distribution across large clusters. Ranked #49 of 61 in Container Registries by our editors (6.0/10); pricing: Open source; best for large self-hosted environments needing P2P pulls.

6.0/10Editor score
Visit Kraken
Kraken6.0 Visit Kraken

At a glance

  • Editor score
    6.0 / 10
  • Pricing
    Open source
  • Best for
    Large self-hosted environments needing P2P pulls
  • Paid from
    None
  • Facts checked
    22 Sep 2026

  • Where it wins

    • Peer-to-peer distribution can spread Docker image blobs across local hosts.
    • Supports S3, GCS, ECR, HDFS, and Docker registry backends.
    • Offers asynchronous cross-cluster replication with rule-based controls.

  • Where it doesn't

    • Supports Docker image blobs rather than OCI artifacts.
    • Does not provide immutable tags.
    • Requires self-hosted deployment and operational ownership.

Our verdict on Kraken

Kraken is an open-source, self-hosted Docker registry designed for large clusters and hybrid-cloud environments. Its main focus is peer-to-peer distribution of Docker image blobs: local agents can pull images from nearby hosts, while registry-compatible proxy components connect Kraken to Docker workflows. It is suited to teams operating their own infrastructure and looking to distribute image content across clusters rather than rely on a vendor-hosted registry.

Kraken’s ecosystem fit is defined by its storage and registry integrations. Pluggable backends include Amazon S3, Google Cloud Storage, Amazon ECR, HDFS, and another Docker registry. The software can run as Docker containers and includes a Kubernetes Helm deployment example. Generic content-addressable blob upload and download APIs extend its storage model, while rule-based asynchronous replication supports transfers between clusters. TLS-based uploader authentication and data integrity protection add controls around image publishing and content handling.

The standout feature is the peer-to-peer pull architecture, which distributes image blobs among participating hosts for large-scale delivery. Kraken also combines that model with proxying, local agents, and cross-cluster replication. Its scope is narrower than a registry that supports broader artifact workflows: the published category specifications show no OCI artifact support or immutable tags, and the product is self-hosted open-source software rather than a vendor-hosted service. Choose Kraken when P2P Docker distribution, pluggable storage, and cluster-level control are priorities. Choose an alternative when OCI artifacts, immutable tagging, or a hosted registry model are required.

Kraken pricing

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

Kraken fact sheet

Free planNot verified
Paid fromNone
Image scanningNot verified
OCI artifactsNo
Immutable tagsNo
Retention policiesNot verified
Replication scopeNot verified
Included storageNot verified
Maximum image sizeNot verified
DeploymentSelf-hosted
SupportCommunity, Docs
Built forMid-market, Enterprise (editorial estimate)
Integrations5 integrations: Amazon S3, Google Cloud Storage, Amazon ECR, HDFS, Docker registry
PricingOpen source
Websitegithub.com
Facts checked22 Sep 2026

Kraken integrations

Kraken lists 5 integrations on its own site.

  • Amazon S3
  • Google Cloud Storage
  • Amazon ECR
  • HDFS
  • Docker registry

Alternatives to Kraken

See all Kraken alternatives →

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Featured on iTechGuides

Featured on iTechGuides — Kraken 6.0/10

Kraken 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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