Alternatives to OpenWrt

NuttX suits developers building embedded software across supported processor architectures and hardware boards, including teams that use simulator targets.

OPNsense

Community Edition may suit users seeking a self-hosted firewall and routing platform on x86-64.

Kali is for experienced penetration testers and security specialists who are comfortable with Linux.

Nix

Nix suits technically comfortable users who need reproducible package builds, system configuration or shared development environments.

ChromeOS suits organizations deploying managed devices for business, education, and specialized frontline or kiosk settings.

Debian suits people and organizations seeking a free operating system for personal computers or cloud virtual machines.

MX Linux suits desktop users looking for a Debian Stable-based system, with choices among Xfce, KDE, and Fluxbox.

pfSense may suit home and remote workers, businesses, government, education, and service providers.

Nura may suit people willing to learn how the system works and contribute to development or testing.

It suits teams deploying Linux on Amazon EC2 or in Docker-compatible environments, including local development.

Solus suits desktop and laptop users seeking a Linux operating system with a choice of four desktop editions.

FreeRTOS suits developers building software for microcontrollers and small microprocessors.

Ubuntu Server suits people deploying Linux on physical or virtual servers, cloud infrastructure or IoT and edge devices.

Rocky Linux suits organizations and administrators seeking a free enterprise operating system compatible with Red Hat Enterprise Linux.