DDG is powered by Bing plus other APIs and their own crawler.
https://duckduckgo.com/duckduckgo-help-pages/results/sources...
> To deliver Instant Answers on specific topics, DuckDuckGo leverages many sources, including specialized sources like Sportradar and crowd-sourced sites like Wikipedia.
> We also maintain our own crawler (DuckDuckBot) and many indexes to support our results.
> we have more traditional links and images in our search results too, which we largely source from Bing.