6. Convoy

Convoy, founded by former Amazon executives, describes itself like a neural network for the freight industry, applying technology and data across its network of carriers to save shippers money and increase earnings for truckers. Convoy's digital trucking network links tens of thousands of small trucking companies and owner-operators via mobile phones as a way to digitize what historically has been a fragmented market leading to empty miles and less-than-full loads. "If you look at all freight transportation, including air, ocean, rail pipeline, and surface transportation on trucks, about 80% of the dollars go to trucks. But, one of the biggest challenges we're seeing is that there aren't enough trucks, there aren't enough drivers, and there are no trailers," co-founder and CEO Dan Lewis told CNBC last year. By Convoy's estimate, trucks run empty up to one-third of the time.