Circular. Circular is a geometric sans-serif typeface created by Swiss designer Laurenz Brunner and released through Lineto in 2013. Circular is Brunner’s second official release, the other being the well-received Akkurat.

“LL Circular is a new take on a classic genre, first explored by Paul Rennerʼs Futura (1927–28). In the process of developing the font, the purely geometric approach gave way to more complex formal conception, resulting in a geometric sans serif marrying purity with warmth.

Keep in mind that if your site will have a lot of visitors the license for these fonts may not cost much less than LL Circular. It might still make sense to contact Lineto and work out a deal. It might still make sense to contact Lineto and work out a deal.

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AirBnB doesn't use Circular, per se, it uses "Circular Air" -- a customized version they had created for them. Also, these are licensed fonts, and technically illegal to just copy and use. Also, these are licensed fonts, and technically illegal to just copy and use.

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Interesting, they've been using it in their playlist covers and marketing collateral for ages, I've never seen it used as a UI font before though. [edit] The character in Circular feels a bit at odds with the darkness of a lot their UI, but that's just my opinion.

License. NOTIFICATION OF LICENSE AGREEMENTYou have obtained this font software either directly from Linotype GmbH or together with software distributed by one of Linotype's licensees.This font software is a valuable asset of Linotype GmbH.