> Duckduckgo itself uses Bing Search as its backend.

Can you provide a source for this? I couldn’t find it myself, but I was searching with DDG.

“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 Verizon Media (formerly Yahoo) and Bing.“