Tracking inventory through a spreadsheet or, worse, memory alone works fine for a business with a handful of products, but it breaks down quickly once a growing catalog spans multiple sales channels, a physical location, and an online store simultaneously, each needing accurate, synchronized stock counts. Inventory management web apps solve this by automatically updating stock levels across every connected sales channel the moment a sale happens, preventing the genuinely costly scenario of selling a product that's actually already out of stock. In 2026, the strongest platforms in this category have also gotten better at demand forecasting, flagging when a specific product is likely to run low based on actual historical sales velocity rather than a business owner needing to notice manually. Here are five inventory management web apps worth using this year. Most also support low-stock alerts sent directly to a phone, meaning a business owner finds out about a shortage before a customer...