Radical Aero is pioneering persistent, high-performance infrastructure in the stratosphere through its autonomous, solar-powered "StratoSats". Founded by Amazon Prime Air veterans, the Seattle-based company builds ultra-lightweight aircraft designed to fly continuously at 65,000 to 70,000 feet for months without landing. By filling the critical middle ground between traditional satellites and ground infrastructure, Radical’s flagship aircraft—Evenstar—boasts a 120-foot wingspan but weighs only 240 pounds, utilizing a zero-emissions, solar-recharging architecture to stay airborne indefinitely. Free from orbital constraints, these rapidly deployable, maneuverable platforms provide an inexpensive, high-resolution solution for a wide range of commercial and national-security dual-use applications, including direct-to-device 5G connectivity, maritime domain awareness, ultra-high-resolution Earth imagery, wildfire tracking, and resilient positioning, navigation, and timing (PNT).