We found 2 fonts on https://buffer.com

CachedRecheck
div
span
button
p
a
li
ul
h2
41 Styles

Figtree

h3
span
h2
div
h4
p
a
h1
h5
20 Styles

Stolzl

Designed by Mariya Lish, Inhouse Type Ltd.

FontofWeb by Simdi Jinkins & Onyemsobi