Earlier quoted context omitted.
Neither is AWS, or Azure. Cloud platforms are their own product. Only one company needs Google's internal infrastructure. That company is called Google. The lessons learned in building those systems can be applied to more generalized solutions which can be sold as standalone products.
> Neither is AWS This article lists some of the AWS services that now power Amazon.com since they moved away from Oracle. So, while it may not have been true in the past, it does now appear that AWS powers a significant portion of Amazon.com. https://aws.amazon.com/blogs/aws/migration-complete-amazons-...
AWS services have always been their own thing, they happen to be useful so today Amazon utilizes them just like anyone else. That doesn't mean the services started internally.
https://www.networkworld.com/article/2891297/the-myth-about-...