I'd be careful with Kagi: unfortunately, collecting your payment information and attaching it to an account is directly at odds with maintaining privacy on the internet. I used Kagi for a year and did enjoy the search, but ultimately didn't renew due to privacy concerns.

They do have privacy pass, which claims to alleviate some of the privacy concerns, but then you lose all the customization functionality (my main use for Kagi) and there appear to be some issues with it (see this thread https://piefed.social/post/1204472).