Just wanted to add my two cents.
I think you could call me a "power user" – I remember times before "social media." I ditched Google years ago.
Kagi Search was needed because Google has a monopoly and destroyed the search experience. I appreciate Kagi's search results, ranking domains, custom CSS, redirects... Those are functions I use daily and haven't found in any other search service, so they're one of the main factors why I decided to pay for Kagi.
But with email, that's not the case. There are many email providers that have been doing this for decades.
From https://blog.kagi.com/first-three-years:
Why can you not search through your emails in your search engine (and AI assistant), and why can you not access search while writing your email?
Why would I want to search my emails in a search engine?
Why do all email AI assistants focus on summarizing and writing emails?
Why would email even have "AI"? There are many issues with "AI," from ethical to privacy to ecological concerns...
How about instead being able to ‘filter all messages from John Wick and label them as work’?
You can't do that? I can... I can even set them to delete after X days, so I only have important emails instead of hundreds of thousands...
Am I the only one who still emails myself when I want to put something on my to-do list?
Yes?
Why don’t email products recognize this important pattern of user behavior and give it the prime spot that it deserves?
Because that's not what email is for?
Email has been conceived to connect humans, and now it is more about connecting spam and spammers to you.
Not true. SpamAssassin does a great job. For years I haven't had any issues with spam...
You're not gonna make anything better than, say, Fastmail, which has been doing it since before Google even thought about Gmail...