What causes overselling?
Selling the same unit twice, on two channels, before either learns about the other. It happens when each sales channel holds its own copy of the stock count and they reconcile on a timer. A unit sold on a marketplace stays visible on the webstore until the next sync, and both orders get accepted.
Buffer quantities are the usual workaround: hold back a few units per SKU so the overlap has somewhere to absorb. That trades guaranteed lost sales for occasional cancellations, which is a reasonable trade only while the underlying counts stay split.
How Endless handles it
Endless Commerce holds one inventory position that every channel reads from, so a unit sold anywhere is unavailable everywhere immediately.
Terms in this answer
Related questions
More on Inventory, or browse every commerce operations answer.
See it on your channels.
Spend your time on the business, not the busywork. Book a demo and watch Endless run your operations across every channel you sell on.
Get a Demo