Subliminator

Subliminator built its catalog around a genuine gap in the print-on-demand market: custom shoes. Its range covers more than 20 shoe styles, high-top basketball sneakers, canvas shoes, mesh knit sneakers, running shoes, slip-ons, skate shoes, chunky sneakers, leather and faux fur boots, slides, and kids' sneakers, a depth of footwear options that essentially no apparel-focused or all-purpose platform tries to match. A 3D mockup generator shows the finished product before a listing goes live, which matters more for footwear than flat apparel since fit and shape are harder to visualize from a flat design file.

There's no minimum order quantity, so a single pair can be ordered to check quality before listing a design. Manufacturing runs out of China, which keeps pricing competitive against US and European alternatives but means longer shipping times for buyers in North America or Europe compared with a domestically fulfilled order. Integration covers Shopify. This one is worth using specifically for a seller who wants shoes in their catalog and isn't finding that option anywhere else in this list.