Convoy began its service last year with the goal of giving local truckers — who specialized in jobs that could be completed in a day — a more efficient way to connect with clients who needed goods shipped.

Local trucking is a heavily fragmented industry, populated by small operators, many of them with 10 or fewer trucks. Matching truckers with clients is typically handled by brokers, who do much of their work by phone, said Dan Lewis, the chief executive of Convoy, who has worked at Amazon.

Convoy gives truckers a smartphone app that they can use to accept a job from shippers. An Uber-like interface allows their clients to see the truck on a map as it heads to its destination. Mr. Lewis said Convoy charged truckers a fee that was less than the roughly 25 percent of the value of a job that a broker typically received.

“We’re going to help you keep your truck full,” Mr. Lewis said. “We’re going to get you more work. People are always looking for their next load.”

Mr. Lewis said the company was operating in Oregon and Washington, and had thousands of truckers active in its network. He said companies that had used its service to ship goods included Scotts Miracle-Gro and a division of Nucor Steel. He said Convoy’s revenue had been doubling every month since the company began.