Topaz: open-source authorization combining the best of OPA and Zanzibar
In plain words
Topaz is an open-source authorization system that combines features from OPA and Zanzibar. It is designed for developers who need to implement access control in their applications. The tool provides a unified approach to managing permissions and policies across services, drawing on established authorization patterns to offer flexibility in how organizations define and enforce access rules.
written from the facts on this page · September 2026
Does the same job
all alternatives →- T0Topaz 0.30 – OSS authz service combining the best of OPA and Zanzibar2023 · aserto.com · ▲35
Hey folks! As Topaz turns a year old, we just released a big update, including support for a new authorization schema language, a built-in visual console, REST APIs for the ReBAC directory, a full test harness, and many other improvements. Would love to get your feedback! Check out the blog post [0] for the complete details (including some cool screenshots), or clone / fork the repo here [1]. Many thanks! [0] https://www.aserto.com/blog/announcing-topaz-030 [1] https://github.com/aserto-dev/topaz
- POPermify – Open-source authorization service based on Google Zanzibar2022 · github.com · ▲122
- P1Permify 1.0 – Open-source fine-grained authorization service2024 · github.com · ▲154
Permify was born out of our repeated struggles with authorization. Like any other piece of software, authorization starts small but as things grow scaling it becomes a real pain and begins to hinder product development processes. Ad-hoc authorization systems scattered throughout your app’s codebase are hard to manage, reason about, and iterate on as the company grows. Also you will need to have more specific access controls as things grow. Traditional approaches like RBAC is inefficient for defining granular permissions such as resource-specific, hierarchical, or context-aware permissions.…
- OSOpen-Source, Google Zanzibar Inspired Authorization Service2023 · github.com · ▲7
Hey HN, I recently shared my thoughts on why Google Zanzibar is a great solution for implementing authorization[1] and why we decided to build Warrant’s core authz service using key concepts from the Zanzibar paper. As I mentioned in the post, we recently open sourced the authz service powering our managed cloud service, Warrant Cloud[2], so I thought I’d share it with everyone here. Cheers! [1] https://news.ycombinator.com/item?id=36470943 [2] https://warrant.dev/
- SPSpiceDB – production-ready, open-source Google Zanzibar implementation2021 · github.com · ▲16
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