There is a counterpart company in China called FlashEx that is doing pretty well (just raised Series D in 2018) right now, focusing on same city on demand shipping.
Similar to Gojek and Grab in SE Asia. They're basically bike couriers but on mopeds. You give them an object and address, and they'll take it there. Faster than the mail, obviously; and much more convenient than navigating through SE Asian traffic yourself.