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Warrant

Open-source authorization service for fine-grained access

Identity & SSO ★ 1.3k stars Medium setup Apache-2.0

Warrant is an open-source, centralized authorization service for defining and enforcing fine-grained, relationship-based access control across applications. It is self-hosted with REST and SDK access.

Official siteSource code

Key features

  • Relationship-based access control
  • Centralized policy service
  • REST API and SDKs
  • Self-hostable

Strengths

  • Released under the Apache-2.0 license
  • First-class Docker support for quick deployment
  • Active community (1.3k GitHub stars)
  • Written in Go

Is Warrant secure?

OSV.dev has no published security advisories for Warrant's repository. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

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

Warrant replaces

Self-hosted Auth0 FGA alternatives

Health badge

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

SelfHostIndex: 37 · at risk

Markdown
[![SelfHostIndex health score for Warrant](https://selfhostindex.com/badge/warrant-authz.svg)](https://selfhostindex.com/app/warrant-authz/)
HTML
<a href="https://selfhostindex.com/app/warrant-authz/"><img src="https://selfhostindex.com/badge/warrant-authz.svg" alt="SelfHostIndex health score for Warrant"></a>
reStructuredText
.. image:: https://selfhostindex.com/badge/warrant-authz.svg
   :alt: SelfHostIndex health score for Warrant
   :target: https://selfhostindex.com/app/warrant-authz/

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

Compare Warrant

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