Amazon is on the verge of a major milestone, as it closes in on UPS and FedEx as the largest US delivery service.

Amazon may have started as an online book sales platform, but it has grown far beyond its origins. The company is now the largest e-commerce platform, the largest cloud provider and will soon be the largest delivery service, according to CNBC.

While Amazon originally relied on other services to deliver its products, it has increasingly invested in its own service over the last few years. Dave Clark, Amazon’s CEO of Worldwide Consumer, told CNBC that the company expects to become the biggest service in late 2021 or early 2022.

“We expect we will be one of the largest carriers in the world by the end of this year,” Clark told CNBC’s Becky Quick. “I think we’ll probably be the largest package delivery carrier in the U.S. by the time we get to the end of the year, if not in early ’22.”