The lightweight Linux vendor CoreOS has made a move to flesh out its business offerings by snapping up Docker container hosting firm Quay.io for an undisclosed sum.

Quay.io has developed software that companies can use to stitch together applications while keeping their creations safe and isolated from the rest of the world.

It’s a host for Docker repositories, or collections of Docker images, which contain all the ingredients of an application, like its source code and binary files, and they are also responsible for directing the Docker platform to spin up containers in specific ways dependent on each application.

In a way, it’s similar to how Github hosts source code. It costs nothing to host public Docker repositories at Quay.io, but the company charges for hosting secure, private repositories. It’s pricing is currently set at a minumum $12 per month, which allows up to five private repositories to be hosted.

“With Quay.io onboard we now add another component to complete and easy solution for our customers looking to run containers and achieve warehouse scale compute,” said Alex Polvi, founder and CEO of CoreOS. “We are freeing our customers to use docker containers in a secure and fast way and providing more control over who has access to their source code or applications.”

Docker, Inc. actually has a similar service known as the Docker Hub Registry, but CoreOS obviously thinks it can do with its own. Indeed, it seems like a very good fit considering its unique Linux distro has been built specifically for those who want to run containers.

Quay.io also sells an on-premise version of its software for those enterprise who’re wary of storing their data in the cloud. CoreOS plans to rename this as CoreOS Enterprise Registry, which will be rolled into its Premium Level CoreOS Managed Linux offering.

By gobbling up Quay.io, CoreOS will also expand its presence onto both coasts. It’s planning to open a second office in New York City from where Quay’s staff will continue their good work. In addition to this CoreOS has announced a promotion in light of the merger that will see the first 1,000 customers who sign up for Quay’s 20 private repositories plan get the first six months absolutely free.