UNetbootin vs WinToUSB

UNetbootin creates bootable Live USB drives for Ubuntu and other Linux distributions, allowing installation without burning a CD. It can download a supported distribution or use a Linux ISO already on the computer, and the listed targets are a USB drive or hard disk. Built-in downloads include Ubuntu, Debian, Fedora, Arch Linux, Linux Mint, and FreeBSD, as well as system utilities such as Parted Magic and SystemRescueCD. The site says most Linux ISO files should work, though some require extra boot options or changes, and some cannot boot from USB as-is. Non-Linux operating system ISOs should not be expected to work because they use a different boot mechanism. UNetbootin is available for Linux, macOS, and Windows, and is free; donations are accepted. The source code is available on GitHub under GNU GPL Version 2 or above. Linux download options include an Ubuntu PPA, 32-bit and 64-bit binaries, packages for several distributions, and source code.

WinToUSB creates portable Windows workspaces on external hard drives, USB flash drives, and Thunderbolt drives. It can build one from ISO, WIM, ESD, SWM, VHD, VHDX, DBI, or CD/DVD sources, or copy a currently running Windows installation to a drive. The software also creates Windows installation USBs, can download official Windows ISO files from Microsoft, and makes bootable WinPE USB drives for recovery, backup, and troubleshooting. Delta Clone updates an existing Windows To Go workspace, and WinToUSB can use system backup images made with Hasleo Backup Suite. Professional and Enterprise editions add BitLocker encryption; the free edition is limited to home use and excludes cloning, BitLocker, and partition resizing or moving. The product page lists Windows 7 or later, including x64, x86, and ARM64, plus Windows Server 2008 or later. Hasleo states GPT/UEFI and Windows UEFI CA 2023 compatibility, but cautions that Windows 7 is not fully portable and lacks native USB 3.0 support. The free plan is free. Professional is $44.95, paid once, and Enterprise is $299.95, paid once; prices exclude VAT.