Both are live on this page, both pointed at the same demo project: a sleep tracking app called Lumen.
One script tag on your site or in your web view. It floats in the corner and opens over whatever you built. The bubble in the corner of this page is the real one: open it and ask something.
<script src="__RELAY_ORIGIN__/widget.js" data-relay-key="pk_…" defer></script>
Nothing to build: an address of its own. Link to it from a store listing or a help menu, or load it in a web view inside the app. Same assistant, same inbox. Below is the real one.
__RELAY_ORIGIN__/c/la-tua-app
Add ?mode=email to land on the message form, ?mode=chat to land
on the conversation, and &only=1 to show that half alone.