unDraw publishes a growing library of flat illustrations - people working, empty states, onboarding scenes, error pages - under a license that allows commercial use without attribution. Its killer feature is the color input at the top of the page: type your brand’s primary hex and every illustration re-tints before you download.
Where it shines
- One-click brand matching. The live recolor means the art ships looking commissioned, not stock.
- Empty-state ready. Scenes for “no data”, “404”, “setup complete” - exactly the screens a generated app forgets to design.
- Clean license. Commercial use, no credit required, SVG or PNG export.
Where it falls short
- The flat, faceless style is now a recognizable startup cliché; differentiation requires custom work eventually.
- Library size is finite - you will eventually want a scene that doesn’t exist.
The real cost
Free, forever, no strings. The trade is ubiquity: half the SaaS you’ve seen this year uses it.
Verdict
The standard answer for illustrations in MVPs and generated UIs. Ship with unDraw on day one; commission custom art when the product earns it.