software-defined-radio
(2)
Distributed Spectrum
Distributed Spectrum builds AI-powered radio-frequency sensors and software that automatically detect, classify, and locate signals - drones, jammers, tactical radios, GPS spoofers - in real time. Founded by three Harvard engineers, the company packs commercial hardware and edge AI into sub-one-pound sensors that give soldiers and analysts persistent spectrum awareness without specialist RF expertise. It raised a $25M Series A in March 2025 and has fielded systems with US military branches and partners in Ukraine.
Bastille Networks
Bastille Networks is a San Francisco-based cybersecurity company that secures the wireless airspace - the radio frequency spectrum inside corporate and government facilities that traditional network security tools never see. Using patented software-defined radio and machine learning, Bastille passively detects, identifies, and locates every cellular, Bluetooth, Wi-Fi, and IoT device in a building, including rogue phones and devices not connected to the network. The company serves Fortune 100 firms, financial institutions, and the U.S. intelligence community, and raised a $44M Series C led by Goldman Sachs Asset Management in January 2024.