Google Cloud Filestore - Fully-managed cloud file storage
OwnDrive - OwnDrive is a web-based storage platform allowing the professionals, enterprises, and individuals to easily upload, store, backup, share and collaborate on their files and data with others.
Azure File Storage - Try Azure File Storage for managed file shares that use standard SMB 3.0 protocol. Share data with on-premises and cloud servers, integrate with apps, and more.
Igloo Software - Igloo is a modern intranet, it connects people with the information they need to do their best work.
Librevault - Open source zero-knowledge peer-2-peer file sync designed with privacy in mind.
Google Cloud Resource Manager - Resource Manager provides methods that you can use to programmatically manage your projects on Google Cloud Platform.