DDG is a little bit vague about it on their website, but their staff regularly mentions that the results are primarily from Bing on /r/duckduckgo, for example:

DDG is a little bit vague about it on their website, but their staff regularly mentions that the results are primarily from Bing on /r/duckduckgo, for example: https://www.reddit.com/r/duckduckgo/comments/g8wukz/duckduckgo_broken/fou0fzn/ https://www.reddit.com/r/duckduckgo/comments/g8wukz/duckduck...