Libre Hardware Monitor, a fork of Open Hardware Monitor , is free software that can monitor the temperature sensors, fan speeds, voltages, load and clock speeds of your computer.

SpeedFan is described as 'Program that monitors voltages, fan speeds and temperatures in computers and controls the fans if possible' and is a very popular system information utility in the system & hardware category. There are more than 50 alternatives to SpeedFan for a variety of platforms, including Windows, Mac, Linux, Flathub and Flatpak apps. The best SpeedFan alternative is Libre Hardware Monitor, which is both free and Open Source. Other great apps like SpeedFan are FanControl by Rem0o, Stats, iStat Menus and Sidebar Diagnostics.
Libre Hardware Monitor, a fork of Open Hardware Monitor , is free software that can monitor the temperature sensors, fan speeds, voltages, load and clock speeds of your computer.

Fan Control is a focused and highly customizable fan controlling software for Windows. It supports multiple temperature sources in min, max and average configurations, and fan curve functions, including but not limited to, linear, graph, and mix to control a single fan.





iStat is a series of system monitor apps. It's available in different versions: iStat Menus, iStat for iOS and iStat Server as a companion application to the iStat for iOS app that lets you remotely monitor your computers (free for Windows and Mac).




It is for Apple computers only, Speedfan is not limited to an uncommon platform.


SidebarDiagnostics - A simple sidebar for Windows desktop that displays hardware diagnostic information.




Does NOT support fan speed controls.
Does not control fan speeds


Monitoring temperatures and status of system components such as CPU, GPU and hard disk drive, fan speeds




Good alternative to SpeedFan. Far more up to date.
i think it should be free
Supports more modern hardware, is still regularly updated.


Lightweight macOS tool that tracks thermal pressure and throttling, shows real time CPU temperature and fan speed, provides 10-minute history graphs, statistics for thermal states, and customizable notifications, all without requiring administrator privileges.

Core Temp is a compact, no fuss, small footprint, yet powerful program to monitor processor temperature and other vital information.

Does not support Managing Fan Speeds
you can't control the pc fans


CoreCtrl is a Free and Open Source GNU/Linux application that allows you to control with ease your computer hardware using application profiles.

hwinfo/libhd are used to probe for the hardware present in the system. It can be used to generate a system overview log which can be later used for support.

Monitor and manage all internal Mac temperatures, enhancing longevity by ensuring components remain cool. Supports auto/manual fan speed adjustments and offers comprehensive diagnostics with local or email alerts. Secure and compatible with Macs from 2008 onward.




Monitor and control fans on Apple computers with a simple and efficient user interface



Great program, clean graphic, light and with the right options. The best
Its free and works just as expected


Allows you to set the speed depending on the temperature in the form of a graph