`zrok` is a next-generation, peer-to-peer sharing platform built on top of [OpenZiti](https://docs.openziti.io/docs/learn/introduction/), a programmable zero-trust network overlay. `zrok` is a _Ziti Native Application_.
`zrok` facilitates sharing resources both publicly and privately. Public sharing allows you to share `zrok` resources with non-`zrok` users over the public internet. Private sharing allows you to directly share your resources peer-to-peer with other `zrok` users without changing your security or firewall settings.
Like other offerings in this space, `zrok` allows users to share tunnels for HTTP, TCP and UDP network resources. `zrok` additionally allows users to easily and rapidly share files, web content, and custom resources in a peer-to-peer manner.
`zrok` is an extensible platform for sharing. Initially we're targeting technical users. Super-simple sharing for end users is planned and in the backlog.
`zrok` includes an SDK that allows you to embed `zrok` sharing capabilities into your own applications. If you're familiar with a golang `net.Conn` and `net.Listener`, you'll be right at home with our SDK.
This [blog post](https://blog.openziti.io/the-zrok-sdk) provides more details for [getting started](https://blog.openziti.io/the-zrok-sdk) with the `zrok` SDK.
`zrok` is designed to scale up to support extremely large service instances. `zrok.io` is a public service instance operated by NetFoundry using the same code base that is available to self-hosted environments.
The single `zrok` binary contains everything you need to operate `zrok` environments and also host your own service instances. Just add an OpenZiti network and you're up and running.
See the [Self-Hosting Guide](https://docs.zrok.io/docs/guides/self-hosting/self_hosting_guide/) for details on getting your own `zrok` service instance running.
We maintain a growing playlist of videos focusing on various aspects of `zrok`. This includes the "office hours" series, which are longer-format videos digging into the implementation of `zrok` and showcasing some of the latest features and capabilities: