SystemRescue is described as 'Linux system rescue toolkit available as a bootable medium for administrating or repairing your system and data after a crash. It aims to provide an easy way to carry out admin tasks on your computer, such as creating and editing the hard disk partitions' and is a popular app in the Backup & Sync category. There are more than 10 alternatives to SystemRescue for Linux, Windows, Mac and Self-Hosted solutions. The best alternative is Rescuezilla, which is both free and Open Source. Other great apps like SystemRescue are MediCat USB (Free), Hiren’s BootCD (Free Personal), Hiren’s BootCD PE (Free) and Parted Magic (Paid).
Rescuezilla is a free, easy-to-use hard drive disk cloning and imaging application that boots as a live USB. Rescuezilla is fully interoperable with Clonezilla. This means that backups created by Clonezilla, can be restored with Rescuezilla (and vice versa).
Hiren’s BootCD PE (Preinstallation Environment) is a restored edition of Hiren’s BootCD based on Windows 10 PE x64. PE version is being developed by Hiren’s BootCD fans. it supports UEFI booting and requires minimum 2 GB RAM.
The Parted Magic OS employs core programs of GParted and Parted to handle partitioning tasks with ease, while featuring other useful programs (e.g. Partition Image, TestDisk, fdisk, sfdisk, dd, and ddrescue) and an excellent set of documentation to benefit the user.
Rescatux is a GNU/Linux rescue cd (and eventually also Windows) but it is not like other rescue disks. Rescatux comes with Rescapp. Rescapp is a nice wizard that will guide you through your rescue tasks.
Trinity Rescue Kit or TRK is a free live Linux distribution that aims specifically at recovery and repair operations on Windows machines, but is equally usable for Linux recovery issues. Since version 3.