Theseus, a San Francisco-based defense tech startup, has raised $4.3 million in seed funding following a viral tweet that showcased their innovative drone technology. Founded by engineers Ian Laffey, Sacha Lévy, and Carl Schoeller, the company focuses on developing hardware and software that enable military drones to operate without GPS. Despite not having military contracts yet, Theseus is collaborating with U.S. Special Forces for early testing. The funding will aid in tech development and hiring for engineering roles as the company seeks to enhance its capabilities in the defense sector.