SolarWinds Backup - Modern server backup software
Zerto - Virtual replication & recovery solution
Backup Exec - Backup Exec provides simple, complete backup and recovery protection for your business, to cover all data wherever it resides. Try free for 60 days.
Barracuda MSP - Barracuda MSP is the first and only MSP-focused provider of advanced threat protection with backup & disaster recovery - complete data protection for MSPs.
MSP360 - MSP360 (CloudBerry) Backup is a platform that comes with a managed backup service and delivers data protection to users.
Azure Site Recovery - Azure Site Recovery can protect Microsoft Hyper-V, VMware, and physical servers, and you can use Azure or your secondary datacenter as your recovery site.