SHARE Software container company Docker Inc. today disclosed that it has raised $23 million in funding to build new features for the more than 7 million developers who use its tools. The company says it has added close to 2 million users over the last year alone. Palo Alto, California-based Docker is the inventor of modern software containers. Containers allow developers to deploy code in portable packages that can run on many different kinds of infrastructure and provide a high degree of hardware efficiency. Seven years after Docker released the first iteration of the technology, it forms the basis of countless enterprise applications worldwide.