Amazon turned its internal infrastructure into AWS, a $90.8B cloud business

In 2006 Amazon made an unusual choice for an online retailer: it sold pieces of its infrastructure to outside developers. S3 launched as cheap web-scale storage, followed by compute, turning capacity planning from capital spending into usage.

The turn was risky because it pulled Amazon beyond retail into enterprise infrastructure. But S3's simple pricing and APIs gave startups and software teams an alternative to buying servers before knowing demand.

The platform became a second engine for Amazon. In 2023, Amazon reported AWS net sales of $90.8 billion and AWS operating income of $24.6 billion, making cloud infrastructure central to the company's profit mix.

AWS segment sales reached $90.8B in 2023, with $24.6B operating income.

Amazon had already built distributed systems for its own retail traffic and could package that work as primitives.

Pay-as-you-go pricing made the offer legible to small developers as well as enterprises.

Starting with narrow services like storage reduced adoption friction and let AWS compound feature by feature.

A hard internal platform problem can become a separate business if the interface is simple enough for outsiders.

AWS made Amazon a default provider for startups, enterprises and public-sector workloads. It also changed investor understanding of Amazon: beneath the low-margin retailer was a high-margin infrastructure platform.