Guides

Razer Synapse alternatives

Four ways to configure a Razer mouse without running Synapse 4. Which one works depends on your operating system and your mouse; each row says what it does not do.

Side by side

WhatfreenapseOpenRazer and PolychromaticRazer Synapse WebRazer Synapse 4
Runs onWindows 10 and 11LinuxChrome, Edge and Opera (WebHID); Firefox does not support itWindows
DevicesViper V3 Pro, verified. Other Razer mice open read-only until an owner tests themHundreds of Razer devices; the Viper V3 Pro since OpenRazer 3.9.0In the beta, three Huntsman V3 Pro keyboards; no mice yetEvery current Razer device
SetsDPI stages, polling rate, buttons on both layers, Dynamic Sensitivity, lift-off, sleep and low power, dongle LED, pairing; macros and per-game profiles in the tray appDPI, polling rate, lighting, battery, and more per device; no button remappingA simplified set; Razer points to Synapse 4 for the restEverything, plus cloud profiles and Chroma
AfterwardsNothing has to run. The tray app is optional, 10 MBA kernel driver and a daemonA browser tab while you configure11 Electron processes and 2 services, about 1.5 GB
AccountNone, no internetNoneLoads from the internet, then works offline for the sessionRazer ID
LicenseMIT, freeGPL, freeRazer’s, freeRazer’s, free

Sources: the OpenRazer and Polychromatic sites, Razer’s Synapse Web announcement and support page, and the Synapse 4 numbers measured on one PC for the home page.

The fifth option: set it once, remove everything

The Viper V3 Pro keeps its settings in onboard memory. Whatever tool writes them, the mouse keeps working the same way afterwards with nothing installed, on Windows, Linux or a Mac. So a Mac user can configure the mouse once on a Windows PC with freenapse, or on Linux with OpenRazer, and never run anything on the Mac. What you give up is the software-side extras: battery in the tray, per-game switching, macros.

Questions

Is freenapse a Razer Synapse alternative for every Razer mouse?
No. It is verified on one mouse, the Viper V3 Pro, wired and on its dongle. Other Razer mice are detected and opened read-only; freenapse probe prints what they answer, and an issue or pull request with that output is how a mouse gets added.
What about Synapse 3?
Razer’s older app still supports the mouse, and reviewers have found it detected the Viper V3 Pro when Synapse 4 would not. It is still Razer’s software, with the account and the background services, and Razer is moving devices to Synapse 4.
Does OpenRazer work on Windows?
No, it is a Linux kernel driver. On Windows the choices are Razer’s own software, Synapse Web for the devices it supports, or freenapse for the Viper V3 Pro.
Uninstall Razer Synapse and keep your settings
The order to do it in on Windows.
Set the DPI and polling rate without Synapse
The commands, with what the mouse does with each value.