tresorit is a file hosting service focused on data security. All data is automatically end-to-end encrypted, so it is not possible for the provider to read the data even if someone gets access to the server.

Koofr is a file hosting service from Slovenia. They offer a web application and apps for iOS, Android and macOS.

pCloud is a file hosting service from Switzerland with good prices and with apps for many platforms. Apps are offered for Windows, MacOS, Linux, iOS and Android. Additionally, browser add-ons are offered with which, for example, images can be quickly stored in pCloud's storage.

In the basic plan, the data is not encrypted on the client, but there is an extra that can be purchased to activate zero-knowledge encryption.

Nextcloud is an open source file hosting service for self-hosting. The German company behind Nextcloud sells enterprise support for safe and compliant usage in companies or other organizations. In addition to file hosting services, which is marketed as Nextcloud Files, there is also Nextcloud Talk and Nextcloud Groupware. Nextcloud Talk offers audio and video calls and Nextcloud Groupware a calendar, contacts and email management. All products together are called Nextcloud Hub.