Tuta x Proton in one paragraph

Tuta (was Tutanota) has Calendar search on mobile, works offline and syncs Contacts with the mobile device (both Android and iOS); Proton offers none of these; you can use 3 custom domains on Tuta entry plan x 1 domain on Proton. Proton interface is modern and beautiful; Tuta just works.
If you want to test Tuta too, this is my affiliation link for a free month when you upgrade to a paid plan: https://app.tuta.com/signup?ref=OWZCcml5eVc