Not exactly.
Builtwith lookup what technologies is present on website and build technologies ranking.
But publicwww can find websites with any technology by your wishes (not only categorized).
Publicwww is not for ranking, it is for search.
You just need to know any specific signature in html code.
There is another service https://seomon.com/ - it is provide same functions as builtwith/w3tech and some additional features for deep technologies inspection (page loading speed, dns, ssl tests, html validator, blacklist checker).