I don't use or trust Kagi but based on what I know about them from my research, this isn't true and sounds like thinly veiled racism because the founder is Russian.
Edit: I was corrected. The founder is Serbian. My apologies.
> thinly veiled racism because the founder is Russian
thanks for the laugh. As far as yandex goes, you are on the right track though: my grandad used to say, "If a russian ever says good morning to you, you have learned two things: it's not good and it's not morning". For the record, the founder is Serbian, As for the claim, sure, they aren't really hiding it: https://kagi.com/changelog#5340
I don't have an opinion either way, but they were perhaps referring to the announcement that they are integrating yandex as a source for images. I didn't follow it all closely, but there was some controversy about it.
Edit: I was corrected. The founder is Serbian. My apologies.