Omnity

Omnity is an interesting tool for content analysis. Sometimes it is called a search engine but as much as I saw there is no automatic search.
You have to put in documents or captures selected text from a webpage.

https://www.omnity.io/

see for example: Amanda DiSilvestro (2017): 6 innovative new search engines to keep an eye on URL: https://searchenginewatch.com/2017/11/29/6-innovative-new-search-engines-to-keep-an-eye-on/

Matt Southern (2016): New Search Engine Omnity Said to Be “Smarter Than Google”

https://www.searchenginejournal.com/omnity-search-engine/164756/#close