The DEMO version only includes 4 pages:
https://kactus.io
https://kactus.io/pricing.html
https://kactus.io/release-notes.html
https://kactus.io/help.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
Go back to the index page