Not OP, but I loved Neeva’s results. That being said, it’s a bit too personalized to my liking. For example, it automatically detected my location to display the weather, and the app’s search history cannot be disabled without private mode. For a “private” search engine, it did way too many personalizations by default. These few things, and a somewhat confusing UI made me switch to Orion (Kagi).

I personally use neeva and like it so far. High quality results, some fun UI to interact with on cooking and sports topic. Also like the feature to create spaces for sites interested.