Custom Firmware for the Nintendo Switch is a modified version of the official firmware to provide new features and unlock functionalities. Custom Firmware allows homebrew applications to run and is often associated with piracy.
Atmosphère by SciresM
Atmosphère is a Custom Firmware for the Nintendo Switch that re-implements some of the consoles operating system modules. The CFW is completely open source, giving other developers the opportunity to rewrite any existing feature on the console.
Installing and running Atmosphère requires you to enter RCM Mode on the console.
ReiNX by Reisyukaku
RajNX by Rajkosto
RajNX is advertised as the best and most user friendly (free) starter pack for the Nintendo Switch. The latest release can be download from switchtools.sshnuke.net. It works on all Nintendo Switch firmwares automatically and supports homebrew with hbloader and hbmenu.
Installing and running RajNX requires you to enter RCM Mode on the console.
SX OS by Xecuter (Paid)
SX OS is a paid Custom Firmware for the Nintendo Switch that can be purchased with or without a dongle (hardware). It works on every console exploitable with Fusée Gelée.
SX OS requires a paid license and we do not recommend you to pay but use a free alternative.