Topaz

Self-hosted authorization service giving apps and APIs fine-grained, policy-based access control.

Servicefree

Topaz is an open-source authorization service for applications and APIs. It pairs Open Policy Agent as a decision engine with a Zanzibar-style directory of users, groups, resources and relationships, letting teams move permission logic out of application code into managed policy and log every decision. It is deployed next to the application as a sidecar or microservice.

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Behind the summary, Matchbox keeps a richer profile of Topaz - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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