# Kraken vs Zot

**Leader by vioscaleAI score:** Zot

| Attribute | Kraken | Zot |
|---|---|---|
| **vioscaleAI score** | 47.8 (72% (medium)) | 53.6 (75% (high)) |
| activity.commits_last_30d | 29 | 67 |
| adoption.dependent_repos | 1 | 0 |
| adoption.github_stars | 6,743 | 2,865 |
| content.faq | `[{"answer":"Open-source P2P-powered Docker registry designed for scalable and highly available image management, replication, and distribution in hybrid cloud environments with pluggable storage backends. It is indexed under Container Registries.","source":"https://github.com/pricing","question":"What is Kraken?","confidence":0.6},{"answer":"Kraken is open source, so it can be self-hosted and used at no licence cost. It is released under the Apache-2.0 licence. Pricing changes often, so verify at source before relying on it.","source":"https://github.com/pricing","question":"Is Kraken free to use?","confidence":0.6},{"answer":"Kraken supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://github.com/pricing","question":"What platforms does Kraken support?","confidence":0.6},{"answer":"Yes. Kraken can be deployed hybrid and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://github.com/pricing","question":"Can Kraken be self-hosted?","confidence":0.6},{"answer":"We have confirmed 4 integrations for Kraken, including S3, GCS, ECR and HDFS. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://github.com/pricing","question":"What does Kraken integrate with?","confidence":0.6},{"answer":"Yes. Kraken is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/uber/kraken","question":"Is Kraken open source?","confidence":0.95}]` | `[{"answer":"A lightweight, self-contained registry for managing container images that fully implements OCI standards. It runs as a single binary without elevated privileges and includes built-in security scanning, access control, garbage collection, and image deduplication. It is indexed under Container Registries.","source":"https://zotregistry.dev","question":"What is Zot?","confidence":0.6},{"answer":"Zot is open source, so it can be self-hosted and used at no licence cost. It is released under the Apache-2.0 licence. Pricing changes often, so verify at source before relying on it.","source":"https://zotregistry.dev","question":"Is Zot free to use?","confidence":0.6},{"answer":"Zot supports macOS, Linux and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://zotregistry.dev","question":"What platforms does Zot support?","confidence":0.6},{"answer":"Yes. Zot can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://zotregistry.dev","question":"Can Zot be self-hosted?","confidence":0.6},{"answer":"Yes. Zot is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/project-zot/zot","question":"Is Zot open source?","confidence":0.95}]` |
| deployment.options | `{"cloud":true,"hybrid":true,"self_hosted":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | A peer-to-peer based Docker registry system designed for high-throughput distribution of container images across large clusters and hybrid cloud environments with built-in support for multi-cluster replication. | A lightweight, self-contained registry for managing container images that fully implements OCI standards. It runs as a single binary without elevated privileges and includes built-in security scanning, access control, garbage collection, and image deduplication. |
| features.capabilities | `{"hosting":"self","private_repos":true,"artifact_types":"images","high_availability":true,"replication_mirroring":true}` | `{"rbac":true,"hosting":"both","oci_compliant":true,"private_repos":true,"artifact_types":"images","vulnerability_scanning":true}` |
| integrations.count | 5 | 1 |
| integrations.list | `[{"name":"S3"},{"name":"GCS"},{"name":"ECR"},{"name":"HDFS"},{"name":"Harbor"}]` | `[{"name":"Stacker"}]` |
| language.primary | Go | Go |
| license.spdx | Apache-2.0 | Apache-2.0 |
| platform.support | `{"cli":true}` | `{"cli":true,"mac":true,"linux":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://github.com/pricing","retrievedAt":"2026-09-14T13:21:23.302Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://zotregistry.dev","retrievedAt":"2026-08-03T13:02:43.251Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | yes |
| release.cadence_days | 14 | 31 |
| release.history | `[{"url":"https://github.com/uber/kraken/releases/tag/v0.1.28","date":"2026-08-31T10:56:55Z","type":"stable","version":"v0.1.28"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.27","date":"2026-07-06T09:38:25Z","type":"stable","version":"v0.1.27"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.26","date":"2026-06-29T12:12:10Z","type":"stable","version":"v0.1.26"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.25","date":"2026-06-22T14:26:47Z","type":"stable","version":"v0.1.25"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.24","date":"2026-06-10T11:12:08Z","type":"stable","version":"v0.1.24"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.23","date":"2026-05-26T11:25:18Z","type":"stable","version":"v0.1.23"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.22","date":"2026-04-14T10:23:31Z","type":"stable","version":"v0.1.22"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.21","date":"2026-03-23T15:50:36Z","type":"stable","version":"v0.1.21"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.20","date":"2026-03-02T12:26:02Z","type":"stable","version":"v0.1.20"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.19","date":"2026-01-26T11:46:01Z","type":"stable","version":"v0.1.19"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.18","date":"2026-01-05T09:55:25Z","type":"stable","version":"v0.1.18"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.17","date":"2025-12-17T10:09:17Z","type":"stable","version":"v0.1.17"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.16","date":"2025-12-08T16:40:34Z","type":"stable","version":"v0.1.16"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.15","date":"2025-11-28T10:16:26Z","type":"stable","version":"v0.1.15"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.14","date":"2025-11-18T12:34:04Z","type":"stable","version":"v0.1.14"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.13","date":"2025-11-10T13:30:12Z","type":"stable","version":"v0.1.13"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.12","date":"2025-10-20T13:49:55Z","type":"stable","version":"v0.1.12"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.11","date":"2025-10-10T12:12:04Z","type":"stable","version":"v0.1.11"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.10","date":"2025-09-23T11:20:24Z","type":"stable","version":"v0.1.10"},{"url":"https://github.com/uber/kraken/releases/tag/v0.1.9","date":"2025-09-09T10:56:10Z","type":"stable","version":"v0.1.9"}]` | `[{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.22","date":"2026-10-06T16:50:05Z","type":"stable","version":"v2.1.22"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.21","date":"2026-09-06T18:44:38Z","type":"stable","version":"v2.1.21"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.20","date":"2026-08-04T17:51:30Z","type":"stable","version":"v2.1.20"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.19","date":"2026-08-04T06:46:22Z","type":"stable","version":"v2.1.19"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.18","date":"2026-06-24T15:30:19Z","type":"stable","version":"v2.1.18"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.17","date":"2026-05-18T05:44:37Z","type":"stable","version":"v2.1.17"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.16","date":"2026-04-19T06:26:29Z","type":"stable","version":"v2.1.16"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.15","date":"2026-03-08T22:31:57Z","type":"stable","version":"v2.1.15"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.14","date":"2026-01-25T17:14:38Z","type":"stable","version":"v2.1.14"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.13","date":"2025-12-23T10:14:48Z","type":"stable","version":"v2.1.13"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.12","date":"2025-12-21T20:45:14Z","type":"stable","version":"v2.1.12"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.11","date":"2025-11-20T20:14:44Z","type":"stable","version":"v2.1.11"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.10","date":"2025-10-18T18:46:36Z","type":"stable","version":"v2.1.10"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.9","date":"2025-10-14T16:18:49Z","type":"stable","version":"v2.1.9"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.8","date":"2025-09-01T19:20:42Z","type":"stable","version":"v2.1.8"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.7","date":"2025-08-03T16:35:59Z","type":"stable","version":"v2.1.7"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.6","date":"2025-07-27T01:14:14Z","type":"stable","version":"v2.1.6"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.5","date":"2025-06-17T18:04:11Z","type":"stable","version":"v2.1.5"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.4","date":"2025-06-06T02:31:04Z","type":"stable","version":"v2.1.4"},{"url":"https://github.com/project-zot/zot/releases/tag/v2.1.3","date":"2025-05-22T17:04:49Z","type":"stable","version":"v2.1.3"}]` |
| reliability.status_page | yes | - |
| security.disclosure_policy | yes | - |
| security.scorecard | 4.6 | 8 |
| security.trust_center | https://github.com/security | - |
| security.vulnerabilities | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fuber%2Fkraken&per_page=100","last_12m":0,"max_severity":"HIGH"}` | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=zotregistry.io%2Fzot&per_page=100","last_12m":0,"max_severity":"MODERATE"}` |

## Capabilities (Container Registries)

| Capability | Kraken | Zot |
|---|:--:|:--:|
| **Deployment** |  |  |
| Hosting | Self-hosted only | Cloud + self-hosted |
| **Standards** |  |  |
| OCI Distribution Spec compliant | - | ✓ |
| **Scope** |  |  |
| Artifact types | Container images only | Container images only |
| **Security** |  |  |
| Built-in vulnerability scanning | - | ✓ |
| Image signing (Cosign/Notation) | - | - |
| SBOM generation / storage | - | - |
| **Access** |  |  |
| Fine-grained RBAC / robot accounts | - | ✓ |
| Private repositories | ✓ | ✓ |
| **Distribution** |  |  |
| Geo-replication / mirroring | ✓ | - |
| Pull-through cache / proxy | - | - |
| **Integration** |  |  |
| Native cloud IAM integration | - | - |
| **Pricing** |  |  |
| Pull-rate limits | - | - |
| **UX** |  |  |
| Web UI / console | - | - |
| **Ops** |  |  |
| High-availability deployment | ✓ | - |

*Source: vioscaleAI. Generated 2026-10-16T21:42:32.807Z. "-" = undocumented, not absent.*