Duplicacy is a new generation network and cloud backup tool based on the idea of Lock-Free Deduplication. Currently it supports local drives, SFTP servers, Amazon S3, Backblaze B2, Microsoft Azure, Google Cloud Storage, Google Drive, OneDrive, Dropbox, and Hubic
Vertical Backup is a special edition of Duplicacy developed for VMware vSphere (ESXi) which can backup virtual machines to networked drives, SFTP server, Amazon S3, Microsoft Azure, and Backblaze B2.
At the heart of our Acrosync products is a C++ rsync client library written from scratch and therefore not subject to GPL. It is available on GitHub under the Reciprocal Public License. Contact us if you are interested in a commercial license.