[djchen]

I don't know if this is still the case but Jet doesn't handle fulfillment for all of the items on their store. I've bought stuff on Jet that were shipped from over e-commerce web sites.

[thomastjeffery]

Amazon does the same thing, but since it is primarily a fulfillment company, it does end up doing most of that itself.

[brianwawok]

Correct, many third party sellers ship things on Jet (just like on Amazon). Unlike Amazon, it is less clear who is shipping a given item.