S44 Energy Email Format
Software DevelopmentNew Jersey, United States11-50 Employees
S44 Energy develops open-source software for electric vehicle charging, enabling operators to own and control their infrastructure without vendor lock-in or per-session fees. Based in Mahwah, New Jersey, it is the team behind CitrineOS, a Linux Foundation Energy project deployed across more than 200 charging networks, and TopazEV, the Open-as-a-Service CSMS built on open standards. The company provides a production-ready CSMS platform that can be deployed in weeks, along with CitrineOS as an open-source foundation and custom engineering for operators pursuing scale. Its customer base includes Electrify America and other operators across the United States and Europe. In May 2025, Olga Haygood was appointed chief executive officer, signaling a leadership change.