Dropbox.

US cloud storage platform for file sharing and collaboration

Facts

Tresorit
Swiss end-to-end encrypted cloud storage for sensitive data
CH · commercial
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pCloud
Swiss cloud storage with optional client-side encryption
CH · commercial
↗
Jottacloud
Norwegian cloud backup and storage
NO · commercial
↗
Nextcloud
Open-source self-hosted collaboration platform for file sync, chat, and office
DE · open-source
↗
Proton
Swiss encrypted email, calendar, drive and VPN suite
CH · commercial
↗
Cozy Cloud
French personal cloud platform for storage, contacts and finances
FR · open-source
↗
Ente
Encrypted photo storage and backup as Google Photos alternative
NL · open-source
↗
Filen
German zero-knowledge encrypted cloud storage with high security
DE · open-source
↗