Typically every search query on Kagi will call a number of different sources at the same time, all with the purpose of bringing the best possible search results to the user.
But most importantly, we are known for our unique results, coming from our web index (internal name - Teclis) and news index (internal name - TinyGem). Kagi’s indexes provide unique results that help you discover non-commercial websites and “small web” discussions surrounding a particular topic.
They just proxy searches and then sort them lol. Definitely caching thrown in there too, as if that even changes anything. You’re paying $10/mo for that when DDG does the same thing for free.