ownCloud - ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.
Dropbox - Online Sync and File Sharing
Resilio Sync - Resilient, fast and scalable file synchronization for enterprises and individuals
Google Drive - Access and sync your files anywhere
Nextcloud - With Nextcloud enterprises host their own secure cloud solution for storage, collaboration & communication from any device, anywhere.
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...