Daily reminder that the majority of alternative search engines get their upstream results from Bing or Google. As part of their agreements with Microsoft and Google, they may share some information with them. This is not a secret or anything; you can read it all in their terms of service.

Also a reminder that most of these search engines are black boxes. They're all closed source and all we have is their "just trust us" promises of privacy and security and none of them have been audited by trusted third parties as far as I am aware. At this point, just use the one that most closely aligns with your personal values and ethics.