https://techcrunch.com/2019/04/02/chef-goes-100-open-source/

Chef, the popular automation service, today announced that it is open sourcing all of its software under the Apache 2 license. Until now, Chef used an open core model with a number of proprietary products that complemented its open-source tools. Most of these proprietary tools focused on enterprise users and their security and deployment needs. Now, all of these tools, which represent somewhere between a third and half of Chef’s total code base, are open source, too.

“We’re moving away from our open core model,” Chef SVP of products and engineering Corey Scobie told me. “We’re now moving to exclusively open source software development.”