The shape, and then a conversation
There is no per seat number on this page. Publishing one before it is settled would mean changing it later, and a price that moves is worse than a price that arrives in a conversation.
Two hosting options
Hosted by us
The default. Where it is hosted and what that means for your data is a question for the call, and it is on the security page as one we do not answer with a guess.
Self hosted on your own infrastructure
Available. What it involves on your side is part of the same conversation.
What this is not
There is no free tier and no self serve signup. An internal audit platform is deployed into a function with an existing universe, an existing plan and existing people, and none of that starts with a credit card.
What a deployment includes, what an implementation involves, and what moves the price up or down are the substance of the call. They are not on this page because they are not settled, and a page that guessed at them would be read as a quote.