[JeremyNT]

This is one reason I've been trying out qwant lately over ddg. From what I can gather they generate results from their own crawler rather than relying on Bing.

Unfortunately getting concrete information about this is oddly difficult. Anecdotally just from comparing a couple of sample searches ddg seems to be based on Bing, but not exactly, and their own faq claims they use other sources too.