Budderfly | 12,121 followers on LinkedIn. Budderfly is the fastest-growing Energy Efficiency as a Service company in the United States. | Budderfly, ranked as one of the fastest-growing Energy as a Service (EaaS) companies in the United States, is the premier sustainability partner for businesses with repeatable footprints, including restaurants, retail, health facilities, and more. Budderfly installs, monitors, and manages a combination of patented technologies, high-efficiency equipment, and proprietary energy software for its customers at no out-of-pocket cost. The company’s in-house expertise and growing tech-enabled capabilities drive maximized and long-term positive outcomes for customers.