Picking an inventory tool early saves a lot of rework later. The problem is that most comparison articles assume you already know what purchase orders, SKU mapping, and 3PL integrations mean. This list does not make that assumption.
Shopify built-in inventory
If your store runs on Shopify, the platform tracks stock quantities automatically as orders come in. You can set low-stock alerts and manage variants. It is a reasonable starting point for stores with fewer than 200 products and a single warehouse location.
Cin7 Core (formerly DEAR Inventory)
Cin7 Core suits stores that buy from suppliers and need to track purchase orders, landed costs, and stock across multiple locations. The learning curve is steeper than Shopify, but the depth of reporting is considerably better for stores growing past the early stage.
Inventory Planner
This tool focuses on replenishment forecasting. It analyses your sales history and suggests when to reorder and how much. For beginners who keep running out of their best-selling products, this addresses the core problem directly.
Linnworks
Linnworks connects stock across marketplaces like Amazon, eBay, and your own website simultaneously. When a sale happens on one channel, stock updates everywhere. This prevents the classic overselling problem that hits stores expanding beyond a single platform.
None of these tools replace good habits around counting stock regularly and reviewing supplier lead times. Software supports the process; it does not replace judgement.