Noisli might be a bit more popular than Trizen. We know about 1 link to it since March 2021 and only 1 link to Trizen. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
As a side note, I use the trizen AUR helper program to install AUR packages because one of it's nice features over yay, etc, is that it by default shows the content of the PKGBUILD and any other files (patches etc) for an AUR package, so you can see or edit them before installing a package. Source: almost 3 years ago
I use a website called noisli.com for the background noise. You can give it a try if you would like to. Source: about 1 year ago
Yay - Yay is an AUR helper written in go, based on the design of yaourt, apacman and pacaur.
Noizio - Feeling that the noise of the big city is too much for you to bear?
paru - An AUR helper written in Rust and based on the design of yay. It aims to be your standard pacman wrapping AUR helper with minimal interaction.
MyNoise - Custom shaped online noise machines. Many Many generic sounds
pikaur - AUR helper with minimal dependencies. Review PKGBUILDs all in once, next build them all without user interaction.Inspired by pacaur, yaourt and yay.
A Soft Murmur - Ambient sounds to wash away distraction.