Kagi is jaw-droppingly amazing. With Google search quality declining, Bing being on average 95% as good as Google, and DuckDuckGo being 90% as good, I was doubting there was any way that search engines would ever improve. Kagi has removed that doubt completely. I ask for stuff and it finds it. I couldn't believe there could be such a useful product.
Apparently it uses Bing plus some secret sauce although in my experience the results are a bit worse than pure Bing. Having said that I have not performed a rigorous study, this is just my guess from using all these search engines over a prolonged period.
It was mostly Bing and Yandex. The latter was responsible for the odd Russian language results you'd get at times but presumably produced English results as well.
Bing may be that good for some, but every time I use it it stinks and I end up back on Google. Same for DDG.
Then again, my queries tend to be pretty specific and are probably not a typical use case.
