Docker, Inc. offers Docker-related products and services and is creating a network
of certified professional support, training, and services providers. We are
committed to keeping Docker open source under the Apache 2.0 license.
They used to be dotCloud, and presumably have some legacy clients still paying them money to keep the lights on.
They raised $15 million from Greylock and Benchmark which I guess will help keep the wolves at bay until they a). figure out how to monetize or b). get bought by Oracle/VMWare or similar