Do they provide "personalized results" like google claims? That would seem to imply they -must- attach searches to your account, wouldn't it?
AFAIK the personalized results are not based on your search history, rather a personalized list of blocked, lowered, raised, or pinned domains. I think some people share their lists, not unlike PiHole.
> Save My Search History
> Currently this option can not be turned on. Kagi does not save any searches by default. In the future we may add features that will utilize your search history and then we will allow you to enable this.