Earlier quoted context omitted.
Kagi isn't a Google/Bing proxy, it's independent. Its quality is similar or better than Google/Bing.
From their FAQ > Our searching includes anonymized requests to traditional search indexes like Google and Bing as well as vertical sources like Wikipedia and DeepL or other APIs. It's a fucking google proxy with some nice css
However they do it, I get different search results from Kagi than I do from say DuckDuckGo and I have no reason to believe my privacy is compromised.