What are some alternatives?
When comparing ConceptKicker and Artstarter, you can also consider the following products
Art Bloom - Canvas prints designed by independent artists.
Artsy - A global platform for discovering and collecting art.
Mapiful - Create & order custom printed maps of your favorite places
WikiArt - The Encyclopedia of Fine Art
LetterNote - Fine Stationery, Art Prints, Accessories & Collectibles
Magnus - Shazam for art