systemd is a suite of basic building blocks for a Linux system. It provides a system and service manager that runs as PID 1 and starts the rest of the system.
Cost / License
- Free
- Open Source (GPL-2.0)
Platforms
- Linux

OpenRC is described as 'Dependency-based init system that works with the system provided init program, normally /sbin/init. It is not a replacement for /sbin/init. OpenRC is 100% compatible with Gentoo init scripts, which means you can probably find one for the daemons you want to start in' and is an app in the os & utilities category. There are more than 10 alternatives to OpenRC for a variety of platforms, including Linux, BSD, Mac, FreeBSD and OpenWrt apps. The best OpenRC alternative is systemd, which is both free and Open Source. Other great apps like OpenRC are runit, Launchd, s6 and sysvinit.
systemd is a suite of basic building blocks for a Linux system. It provides a system and service manager that runs as PID 1 and starts the rest of the system.

a free system array created by Apple inc. For BSD - including macOS as macOS is based on the Darwin kernel of BSD
The Sysvinit package contains programs for controlling the startup, running, and shutdown of the system.
Supervisor is a client/server system that allows its users to monitor and control a number of processes on UNIX-like operating systems.



hummingbird is an init system designed for speed. It does nothing more than start the system and stop the system by default. There are three main "runlevels", fs which is called directly after the pseudo filesystems necessary for the system to run have been mounted...