Examples of websites using
Knockout
(Knockout is a sans-serif font designed by Jonathan Hoefler and released by Hoefler&Co. The font is available in multiple styles, including heavyweight, medium, thin, and ultra-thin, each with a distinctive geometric aesthetic)
with
Untitled Sans
(Untitled Sans is a sans-serif font designed by Klim Type Foundry and released in 2017. The font family consists of 10 styles, including regular and italic styles, available in various weights and widths)