How courier companies sell in the USA
The sale is an account, not a delivery
Consumer parcels are transactional. Business courier revenue is not. It comes from shippers who send the same volume every week for years, which means the sale is really about displacing an incumbent, proving service over a trial, and then defending the account against the next operator making the same pitch. A single won account can be worth more than a hundred one-off deliveries, and losing one quietly is the most expensive thing a courier can do.
Enquiries arrive from inbound search when a shipper is unhappy, from referrals inside verticals where dispatch managers talk to each other, from broker relationships, from formal requests for proposal in healthcare and institutional settings, and from outbound calling into territories the operator already covers. The last of these still works, which is why the phone stays central.