Qwant is just a bing frontend with a bit better privacy, bit they still share some infos:

Why are you transferring data to Microsoft, and what data is it?

Microsoft provides some of the search results you see on our pages, and provides ads to the keywords in your search inquiry. This means that we need to send Microsoft some information related to your search that allows our partner to return results and ads relevant to that search, and to prevent fraudulent clicks or other activities that are not permitted by our Terms of Use.

In order to detect fraud, Qwant uses a specialized service offered by Microsoft, which does not have access to the keywords of your search. Only your IP address and the browser (your “User Agent”) are communicated to this specialized service to calculate a fraud probability score. Keywords are sent separately to another service that does not know your IP address.

Source

PS: The results are Bing’s so they are biased