Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.
Azure Blob Storage - Use Azure Blob Storage to store all kinds of files. Azure hot, cool, and archive storage is reliable cloud object storage for unstructured data
e2ee cloud - e2ee-cloud is a open source, self-hosted, end-to-end encryption software.
Google Cloud Storage - Google Cloud Storage offers developers and IT organizations durable and highly available object storage.
4sync - A wonderful application that links all of your computers and mobile devices together. Easiest way to back up and sync your files online. Cross platform file management in the cloud
Minio - Minio is an open-source minimal cloud storage server.