Proton Mail is the reference Swiss, privacy-first alternative to Gmail and Outlook. Founded by CERN scientists, it encrypts your mailbox end-to-end by default and keeps its servers in Switzerland, where they are shielded by some of the strongest privacy laws in Europe.
The free 1 GB tier is enough for most people, and the paid bundles ramp up quickly: Unlimited adds Drive, Calendar, VPN and Pass alongside Mail, making Proton a full replacement for a Big Tech account rather than just an inbox.