[kitotik]

Citation needed.

They use Bing Ads, but I’m not sure if their actual search results are just proxied Bing results.

[hjek]

I think nowadays they mix in some results from other search engines, but it started out as just Bing results. Doesn't change the point about it being just a proprietary interface to other proprietary search engines.

> We do use results from Bing. Our zero-click info and some other stuff we do, however, uses results from all over.[0]

[0]: https://web.archive.org/web/20180910181021/https://duck.co/f...

[akvadrako]

They are not exclusively Bing, but mostly. I think Wikipedia has the details.

[epicide]

They seem to even let you turn ads off in the settings.