VOLTTRON™ is open source and publicly available from GitHub, and its ongoing development benefits from a highly collaborative approach. The U.S. Department of Energy views the technology as a central component of buildings-grid integration, and provides funding support. Updates and other advances are carried out by a PNNL research team working in concert with an active nationwide community of users. The open nature of this project has allowed it to find usage in a wide variety of organizations and use cases including universities, national laboratories, and commercial companies.