Alternative | Ntlite

is a graphical alternative that focuses on simplicity and visual feedback. It offers a free “Express” edition and a paid “Exynium” edition (around $20). The free version allows you to mount ISOs, remove components, and create unattended setups, but it watermarks the resulting ISO.

MSMG Toolkit is widely considered the best free alternative for those who aren't afraid of a command-line interface. Unlike NTLite, which uses its own proprietary engine, MSMG relies on official Microsoft deployment tools to modify images. ntlite alternative