---
layout: default
---
<div class="home">
    <p>
        The Open Policy Agent (OPA) is an open source project that helps <a class="page-link" href="/docs/intro.html">policy enable</a> your
        application. By integrating with OPA, your application's operators will be empowered to
        manage the size, complexity, and scale of modern deployments.
    </p>
    <h2>Get OPA</h2>
    Latest binary (Linux/64-bit):<br><br>
    <pre>
curl -L https://github.com/open-policy-agent/opa/releases/download/v0.1.0-rc1/opa_linux_amd64 > opa
</pre>
    Latest binary (Mac OSX/64-bit):<br><br>
    <pre>
curl -L https://github.com/open-policy-agent/opa/releases/download/v0.1.0-rc1/opa_darwin_amd64 > opa
</pre>
    From source (requires Go):<br><br>
    <pre>
git clone https://github.com/open-policy-agent/opa.git $GOPATH/src/github.com/open-policy-agent/opa
cd $GOPATH/src/github.com/open-policy-agent/opa
make deps
make
</pre>
    <div class="features">
        <h2>Features</h2>
        <div class="features-grid">
            <div class="row feats">
                <div class="col feat1-1">
                    <h3>Declarative Language</h3>
                    <p>
                        OPA features a purpose-built declarative language for describing the expected
                        state of your application. Policies written in <a class="page-link" href="/docs/lang.html">Rego</a> are readily understood
                        and easy to maintain.
                    </p>
                </div>
                <div class="col feat1-2">
                    <h3>Zero Dependencies</h3>
                    <p>
                        There are zero deployment dependencies in OPA. Furthermore, OPA is designed
                        around the fate-sharing philosophy for highly available systems.
                    </p>
                </div>
                <div class="col feat1-3">
                    <h3>Language Agnostic</h3>
                    <p>
                        OPA exposes RESTful APIs for managing policy modules and state relevant to policy
                        enforcement. The APIs produce and consume JSON data and are accessed via HTTP.
                    </p>
                </div>
                <div class="col feat2-1">
                    <h3>Low Latency</h3>
                    <p>
                        OPA's policy engine is designed from scratch with latency sensitive applications in mind.
                        OPA introduces as little latency as possible while still decoupling policy definitions
                        from application business logic.
                    </p>
                </div>
                <div class="col feat2-2">
                    <h3>Interactive Shell</h3>
                    <p>
                        OPA features an interactive shell that you can use to quickly experiment with
                        queries and data sets.
                    </p>
                </div>
                <div class="col feat2-3">
                    <h3>Embeddable</h3>
                    <p>
                        OPA is written in Go with the intention of being embeddable. Applications written
                        in Go can use OPA as a library if needed.
                    </p>
                </div>
            </div>
        </div>
    </div>
    <div class="Usage">
        <h2>Usage</h2>
        <p>
        OPA is licensed under the Apache 2.0 open source license. OPA is under
        active development.
        </p>
    </div>
</div>