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opa

Open Policy Agent (OPA) is an open source, general-purpose policy engine.

by open-policy-agent · GitHub
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authorizationcloud-nativecomplianceApache-2.0Go
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In plain words

Define and manage rules for access and compliance in your applications.

From the README

Excerpts from the project README on GitHub. Copyright and licensing remain with the respective authors.

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12.1k12.0k
2026-07-122026-08-31
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📄 About

Open Policy Agent (OPA) is an open source, general-purpose policy engine.

opa has 12.1k stars on GitHub. It has been forked 1.6k times. opa is written mainly in Go. It has been in active development since 2015. opa is available under the Apache-2.0 license. Its main topics are authorization, cloud-native, compliance, declarative.

Frequently asked questions

What is opa?

Open Policy Agent (OPA) is an open source, general-purpose policy engine.

Is opa open source?

opa is an open-source project. It is released under the Apache-2.0 license.

Is opa free?

Yes. opa is free and open source — you can use, modify and self-host it.

What license does opa use?

opa is available under the Apache-2.0 license.

What language is opa written in?

opa is written mainly in Go.

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