Updated
Yes — Mona Sans is free to download from Google Fonts. Read the licence it ships with before you use it in client work.
A strong and versatile typeface, designed together with Degarism and inspired by industrial-era grotesques. Mona Sans works well across product, web, and print. Made to work well together with Mona Sans’s sidekick, Hubot Sans. Mona Sans is a variable font. Variable fonts enable different variations of a typeface to be incorporated into one single file, and are supported by all major browsers, allowing for performance benefits and granular design control of the typeface’s weight, width, and slant.
A1 features 6 websites using Mona Sans, including Agentwork, Lando Norris, and Destello. They lean towards Minimal, Sans-serif, and Scroll animation design styles, and they’re most often built with Framer and Webflow.