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Ory Keto

Permission and authorization server based on Zanzibar

Identity & SSO ★ 5.4k stars Medium setup Apache-2.0

Ory Keto is an open-source permission server inspired by Google's Zanzibar paper. It answers fine-grained authorization questions and is self-hosted to manage access control for applications.

Official siteSource code

Key features

  • Zanzibar-style permissions
  • Relationship-based access
  • gRPC and REST APIs
  • Fast checks

Strengths

  • Released under the Apache-2.0 license
  • First-class Docker support for quick deployment
  • Kubernetes-ready with Helm charts available
  • Mature project with 5.4k GitHub stars

Is Ory Keto secure?

No known vulnerabilities affect Ory Keto's latest release (v26.2.0). OSV.dev lists 1 past advisory for the project; none of them applies to this release. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

  • Most recent fixed advisory CVE-2026-33505, published 2026-03-26 (202 days ago), fixed in 26.2.0

Source: OSV.dev, checked 2026-10-14. How this is measured.

Ory Keto replaces

Self-hosted Auth0 FGA alternativesSelf-hosted OpenFGA alternatives

Health badge

Maintain Ory Keto? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 88 · excellent

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[![SelfHostIndex health score for Ory Keto](https://selfhostindex.com/badge/ory-keto.svg)](https://selfhostindex.com/app/ory-keto/)
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<a href="https://selfhostindex.com/app/ory-keto/"><img src="https://selfhostindex.com/badge/ory-keto.svg" alt="SelfHostIndex health score for Ory Keto"></a>
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.. image:: https://selfhostindex.com/badge/ory-keto.svg
   :alt: SelfHostIndex health score for Ory Keto
   :target: https://selfhostindex.com/app/ory-keto/

The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

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