Zerto

Zerto offers a single software-only solution combining continuous data protection, orchestrated failover and migration, real-time encryption detection, and immutable cloud storage — enabling rapid recovery with minimal data loss and up to 50% TCO savings.

Zerto has been acquired by HPE and claims up to 98% improvement in recovery time, 50% cost savings for customers, and scalability to thousands of VMs; United Airlines is cited as a customer.