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@Tutanota describes their notification service, that allows their users to say #nomoregoogle https://tutanota.com/blog/posts/open-source-email-fdroid/
@jonarvid Do you think they're better than ProtonMail? ProtonMail's search function is pretty bad
Server run by the main developers of the project 
It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!
“ #Tutanota is one of the few services that does not use #GooglePush.
We're here to stop #surveillance by corporations like #Google . That's why we replaced Google’s #FCM with our own #notifications system. ”