Skyfora's StreamSondes are the world's lightest weather sondes, designed to provide superior atmospheric data for enhanced forecasting and research. These ultralight instruments offer industry-standard meteorological measurements, including pressure, temperature, humidity, and wind data, with improved accuracy due to an in-house developed dual-band GNSS receiver. Their lightweight design reduces operational costs by minimizing helium or hydrogen usage and lessens environmental impact by decreasing debris. The StreamSondes' unique features and complementary sensors deliver comprehensive insights, making them a cost-efficient and environmentally friendly solution for obtaining high-quality atmospheric data.