> 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 multiple partners, though most commonly from Bing (and none from Google). — https://help.duckduckgo.com/duckduckgo-help-pages/results/so...
I find their instant answers fairly useful, enough to often not use the other results at all — unfortunately for them enough to use some of the sites some answers are sourced from directly, in particular often using my browsers’ built in Wikipedia searches.
DuckDuckBot I can’t judge, because I don’t know which results come from it (previous comments on HN seem to show the amount of difference between DDG and Bings results vary between search terms¹), but it seems that non-Bing links are a thing and DDG can adjust what fraction of the page they take as whatever gap there is between them and the bigger crawlers’ narrows or widens.
1: https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...