What are some alternatives?
When comparing Handsome Illustrations and Illustrations.design, you can also consider the following products
Evie by unDraw - MIT licensed illustrations for your next project
DrawKit - MIT licensed SVG illustrations, in 2 styles
Humaaans - Mix-&-match illustrations of humans with a design library.
Struct Illustrations - Create your own unique story with editable illustrations
Juicy Illustrations - Illustration constructor for your next project
Open Doodles - A collection of free sketchy illustrations