Late to reply but: from what I heard, Kagi is really good at search (at least when it comes to filters and the such, not sure about base results), but it’s paid so that’s a disadvantage (and also a plus since you don’t get ads nor is your data being sold off), and it’s US based. DuckDuckGo also uses Bing but I guess they have more sources than just them. In my experience it’s about the same, maybe a bit better on DDG, both have shebangs (! for DDG, # for Ecosia) which I find extremely useful.