Unfortunately, we do not have a demo version of Cookiebot CMP.
We recommend that you start a free 14-day trial and try out the different cookie consent banner templates and consent methods (preview mode available) and familiarize yourself with the Admin. As long as you do not add payment details, you will not be billed.
During the set-up, when you are asked to add payment information, click on the link "Continue without entering payment".
You can use the full 14 days as a 'live demo' and decide if you would like to continue using Cookiebot CMP as a paid service thereafter.