What are some alternatives?
When comparing Stubborn Illustrations and Evie by unDraw, you can also consider the following products
DrawKit - MIT licensed SVG illustrations, in 2 styles
Humaaans - Mix-&-match illustrations of humans with a design library.
Handsome Illustrations - Create unique illustrations for websites & applications.
IconStore - Free icon packs by first-class designers
Open Doodles - A collection of free sketchy illustrations
Absurd Design - Free surrealist illustrations for landing pages. 💡