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

runit is described as 'Cross-platform Unix init scheme with service supervision, a replacement for sysvinit, and other init schemes. It runs on GNU/Linux, *BSD, MacOSX, Solaris, and can easily be adapted to other Unix operating systems' and is an app in the os & utilities category. There are more than 10 alternatives to runit for a variety of platforms, including Linux, BSD, FreeBSD, Docker and DragonFly BSD apps. The best runit alternative is systemd, which is both free and Open Source. Other great apps like runit are OpenRC, Launchd, s6 and perp.
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.

OpenRC is a 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...
a free system array created by Apple inc. For BSD - including macOS as macOS is based on the Darwin kernel of BSD
s6 is a small suite of programs for UNIX, designed for process supervision. It can be used as an init system. You can also use all its programs separately.
The perp package provides a set of daemons and utilities to reliably start, monitor, log, and control a collection of persistent processes.
Supervisor is a client/server system that allows its users to monitor and control a number of processes on UNIX-like operating systems.



Chaperone is a lightweight alternative to process environment managers like systemd or upstart. Chaperone provides an extensive feature set, including dependency-based startup, syslog logging, zombie harvesting, and job scheduling.
The Sysvinit package contains programs for controlling the startup, running, and shutdown of the system.
The nosh package is a suite of system-level utilities for initializing and running a BSD or Linux system, and for managing daemons.
Finit is a small SysV init replacement with process supervision similar to that of daemontools and runit. Its focus is on small and embedded GNU/Linux systems, although fully functional on standard server and desktop installations.

Faster is a very little init script aimed at Linux power-users and geek stuff oriented people. It is not industrial strength and does not comply with any other buzzwords. What it really does well is providing much better daemon handling (by means of a daemon manager e.g.