In comparison to Gmail? Yes, but that’s a very low bar to clear. You need to be aware that Tuta are currently enshittifying. The product is getting worse and the price increases. It’s slow, but it’s happening. I switched to disroot.org after 2 years of Tuta because I got fed up with it.
It is in my Scrolls of Grudge, and I quote:
Ads in web UI for paying user.
Made it hard to cancel payment.
Newsletter is just upselling.
Can’t unsub from newsletter.
I may have misunderstood, but Google isn’t doing Android behind closed doors; it’s just development. The released versions will still be as open as they are now, as far as I’ve understood.