We license the majority of the icons, but we’ve custom made a number of icons based on user requests that couldn’t be sourced otherwise.
We source most of our icons from Font Awesome, so we try to follow their ‘solid’ style and approach. All of the icons are SVG and we attempt to target a minimal size for the web - this also naturally lends to following the FA style which is a bit more minimal in nature, has gentle curvature, and isn’t loaded with tons of paths (eg. overly complex polys/shapes)