Field-trial data is confidential to you and your sponsor. This page says plainly how ARIS stores it, who can reach it, and how you get it back out.
The Terms of Service, Privacy Policy and End User License Agreement are public and short enough to read. Every account accepts them at sign-up and the acceptance is recorded.
Enterprise customers who need a signed agreement, a data-processing addendum or a security questionnaire completed can ask; that is part of the plan.
Thirty days, the full product, no card. If it does not save you time on the first trial, you have lost nothing.