I’m personally a Kagi early adopter and Protonmail user for all other standard GSuite product replacements. I find this arrangement perfectly smooth and painless, and never once wished that the services that I get from Proton in any way interacted with the service I get from Kagi. It’s not clear to me at all that duplicating the google product spread would be the best way to extend the value to customers of Kagi search.
I would like to be able to see my emails appear in search results when relevant. Also would like to be able to quikly search the web when writing emails. This is not rocket science but for this you need deep integration between email and search. For some reason Google didn't do this in 20 years although perfectly capable of.
