Kagi is also a meta search engine. The only Kagi-owned index is Teclis, which is very small and really only indexes RSS feeds of small sites. The Kagi API supplements its Teclis results with additional results from Marginalia.

It would be nice to have more search indexes available though, especially via APIs.

I wish Kagi was a search index, back when I was a Kagi subscriber that's what I hoped my funds were going towards building.