Zmanda

Zmanda's founding business is open source backup and recovery software, extended into an enterprise data-protection platform for cloud, hybrid and on-premises environments. It protects servers, disk images, databases, virtual machines, applications and workstations, holding recovery points in immutable WORM storage or on air-gapped media, replicating backup servers and storage across locations, running restore simulations, and verifying data with SHA-256 hashes and ZFS checksums.

Zmanda competes on recovery assurance rather than backup alone: immutable WORM and air-gapped copies shield data from edits and deletions, restore simulations test recovery, and data can be migrated from clouds such as Azure, AWS and GCP back to on-premises targets regardless of where it originated. It targets complex petabyte-scale enterprises with databases larger than 25 TB, and offers a lighter option for smaller environments.