DuckDuckGo does use other search engines, but it doesn’t use Google to my knowledge.

No, it uses Bing AFAIK

Not only Bing, from their docs:

"In fact, DuckDuckGo gets its results from over four hundred sources. These include hundreds of vertical sources delivering niche Instant Answers, DuckDuckBot (our crawler) and crowd-sourced sites (like Wikipedia, stored in our answer indexes). We also of course have more traditional links in the search results, which we also source from a variety of partners, including Oath (formerly Yahoo) and Bing."

(Regarding search results + instant answers: https://help.duckduckgo.com/duckduckgo-help-pages/results/so...)

How current is that page? Yahoo used Google since 2015.

That just raises the question: To what extend does DuckDuckGo still depend on Bing?

I've asked before, and no one seems to be able to provide me with a source that states that DuckDuckGo is just Bing. Yet it comes up every time DuckDuckGo is mentioned in a positive light.

Does anyone outside the company know how DDG works? IIRC a job description hinted at their backend being in Perl, but little else has trickled out. It's easier to find out how Google works, through patents, presentations, the Percolator paper, etc.

Saying that Bing is one of hundreds of sources is like saying that PageRank was just one of Google's 200 signals. Or that Google was just one of hundreds during Bing's hiybbprqag brouhaha.

Fair point, I did not find a date there. Might have been outdated, oops!