Brand font guide
What font does Duolingo use?
Duolingo sets its logo and interface in Feather Bold, a sans-serif typeface by in-house / Metropolis. Duolingo's mascot-led identity uses Feather Bold, a chunky rounded sans that reads friendly at any size.
Free stand-ins
Free Feather Bold alternatives
Feather Bold is a commercial typeface. These open-source Google Fonts capture its character and are free for personal and commercial use.
How we know it is Feather Bold
The identification comes from measuring real letterforms — relative x-height, stem weight, stroke contrast and letter width — the same four metrics the font finder uses on any screenshot you upload. Feather Bold has a signature silhouette, and the free fonts listed above were matched against it on those same numbers.
Recreate the Duolingo look for free
You can set your own site in any of the free alternatives above and get remarkably close to the Duolingo feel — same weight, similar x-height and spacing — without paying for a commercial licence. Each card links to a detail page with the ready-to-paste CSS embed.
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