I've subscribed to Kagi for 2 years and subscribed to Perplexity for 2 months. I liked Perplexity a lot—in particular, I think its search AI search is faster and maybe a little better than Kagi's. But the lack of standard search and not being able to do non-search AI work led me to drop it and just keep Kagi. And then Kagi released Ki, their multi-step assistant, which is close to as good.