Amazon Web Services, the market-leading public cloud, is expanding its CodeDeploy tool to include deployments on companies’ existing data center infrastructure, not just in Amazon’s cloud. That might sound like a small feature announcement, but it’s actually a big deal.

“Customers who are using CodeDeploy to manage their Amazon Elastic Compute Cloud (EC2) instances have asked to be able to use the same fleet coordination features to deploy code to their on-premises instances,” Andy Troutman, Software Development Manager, wrote in a blog post on the news today. “Today we’re happy to make the functionality of CodeDeploy available for use on a customer’s own servers, in addition to Amazon EC2.”

The news shows Amazon is increasingly interested in more hybrid cloud architectures spanning public and private clouds — as are cloud competitors IBM, Microsoft, and VMware, among others.

Microsoft is considered one of the top three companies in the cloud infrastructure market — next to Google, which has also been for the most part focused on cloud-native workloads. So it’s interesting to witness Amazon gaze more seriously at integration with private clouds.

The expansion of the CodeDeploy service could challenge startups in the continuous-delivery market.

Amazon introduced CodeDeploy, among other services, in November at its re:Invent conference in Las Vegas.

Once on-premises infrastructure has been integrated into CodeDeploy, users of the service can “monitor and update the state of your on-premises instances directly,” Troutman wrote.