Depends on how far you want to go. From what I’ve been able to tell, they pedel a lot of flashy metrics and still had a bunch of google calls. Some of which you can manually remove, same as LOS. I would avoid buying into their cloud and keeping an eye on things yourself, if you want to install it. I saw them rebrand a bunch of OSS tooling as their own products back then. Don’t know if things changed since then, but I don’t trust the marketing.

I’m currently on Tuta, because I can’t imagine Mail without a free tier. It’s run out of Germany(EU). Its 3€ a month for the normal tier, free takes away most features. Like Proton, you need to use their (OSS)-Client, for encryption reasons. It’s currently growing and I hope they don’t go crazy anytime soon.

I was looking at Posteo, but I don’t want my entire internet identity to be gone, if I ever can’t pay for it.