Ask HN: What do you use for inventory tracking?

I am looking for a very simple web application to track my startup's inventory. For reference, we use Xero for accounting, Stripe / Square for payment processing, and Highrise for CRM. In a nutshell we are looking for something like those, but for tracking our physical goods.

We have a fairly simple operation - just a few suppliers, one warehouse, and a few SKUs; I've found, though that even from this starting point that there is significant complexity.

I've done a bit of looking and the only one I've found that seems close is Stitch (www.stitchlabs.com). What does this community use?