GoodSync - GoodSync provides highly reliable file backup and synchronization for both individuals and businesses.
Backblaze - Backblaze's remote backup automatically backs up your data to our secure datacenter.
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
SpiderOak - SpiderOak makes it possible for you to privately store, sync, share & access your data from everywhere.
arRsync - arRsync is a tool that is designed for macOS that is used for transferring and synchronizing files between a computer and a storage drive.
CrashPlan - CrashPlan for Small Business backup software offers the best way to back up and store business & enterprise data securely - offsite, onsite & online in the Cloud.