You can contact firstname.lastname@example.org or fill out this contact form https://www.denodo.com/action/contact-us/ if you have questions about Denodo and competitors. Also if you are interested in other sales related activities such as the Denodo usage in US Government Agencies.
Regarding your question about FedRAMP, I would like to add here that FedRAMP is required for SaaS/PaaS/IaaS cloud offerings only. The Denodo Platform is an application that is simply hosted in an approved infrastructure environment (Azure, AWS, Google, etc), hence FedRAMP does not apply.
Hope this helps!