> For the complete documentation index, see [llms.txt](https://unity.zoeimmersive.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://unity.zoeimmersive.com/bridge-xr/start-here/architecture-and-requirements/previous-version.md).

# Previous version

<table><thead><tr><th width="149.58203125">COMPONENT</th><th>SUPPORTED/REQUIRED PLATFORMS</th></tr></thead><tbody><tr><td>Authentication</td><td>Your existing SSO (Microsoft for ex.) can be integrated.</td></tr><tr><td>Backend</td><td>Cloud Service such as Amazon, Azure, Google Cloud or other.</td></tr><tr><td>Frontend</td><td>XR app on VR headsets or Desktop, and Web frontend.</td></tr><tr><td>Zoe for Unity</td><td>Unity 3D Engine is required to develop with Zoe.</td></tr></tbody></table>

### Infrastructure

<figure><img src="/files/yb4FyUdcWLzicPeqOaFZ" alt=""><figcaption></figcaption></figure>