I feel like randomly promoting a Free and Open Source Software (FOSS) project, that I use:
That project is OpenWRT, a Linux distro for routers:
This replaces the usual proprietary bloat, offering better customisation and security features. They also make money from selling their own preloaded router:
https://openwrt.org/toh/openwrt/one
OpenWRT is a member of Software Freedom Conservancy:
https://sfconservancy.org/projects/current/
There are others too, like pfSense and OPNsense, based on FreeBSD.