The best free alternative to Razer Synapse is OpenRGB, which is also Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Razer Synapse and 19 is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Razer Synapse are X-Mouse Button Control, LinearMouse, Artemis RGB and OpenRazer.
Open source RGB lighting control that doesn't depend on manufacturer software. For Windows, Linux, MacOS.
X-Mouse Button Control is a Windows application to remap your mouse buttons and expand the capabilities of your mouse!
This does not serve the primary function of controlling RGB lighting on Razer peripherals.
LinearMouse is a free and open-source utility for macOS which aims to improve the experience and functionality of third-party mice.
Artemis 2 adds highly configurable support for several games to a range of RGB keyboards, mice and headsets.
SignalRGB is a free program which allows you to control all of your RGB devices in one application. Experience synchronized lighting effects across your devices from all major brands.
Universal Control Remapper is a Windows application which allows the end-user to remap any inputs from devices, such as keyboards, mice, joysticks, racing wheels, eye trackers, etc. to virtual output devices.
It’s a lightweight program, with great functionality
Piper is a graphical user interface to configure gaming mice. Configuration options include changing the resolution (DPI) of the mouse, adding and removing profiles, setting LED colors and changing button behaviors.
GIGABYTE Control Center (GCC) is a unified software platform across a variety of GIGABYTE products. Every available utility preferred is optimized and integrated with intuition into this one-stop center.
Keyboarding Master is a gaming and application tool that provides its users with the ability to custom configure their input devices for specific applications within a unified configuration environment. Keyboarding Master supports Linux.
This is the next generation Razer device configuration tool bringing the Razer gaming experience to the free open source world.
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Works with all my RGB hardware, and doesn't cause GSoD like Razer Synapse does. And does it all in a clean, easy to use app.