Stitch Labs is described as 'Inventory management that works. Simplify your entire retail business by centralizing inventory from multiple channels' and is an website in the business & commerce category. There are more than 25 alternatives to Stitch Labs, not only websites but also apps for a variety of platforms, including SaaS, Android, Windows and iPhone apps. The best Stitch Labs alternative is Zoho Inventory. It's not free, so if you're looking for a free alternative, you could try EMERGE App or Skyware Inventory. Other great sites and apps similar to Stitch Labs are inFlow inventory, Katana Cloud Inventory, Retailed and Veeqo.
It is much cheaper and has a free trial, so you don't have to commit to anything.