rf-sensing
(5)
Bulzi, Inc.
Bulzi, Inc. (styled Bulzī, pronounced 'bulls-eye') is a dual-use technology company that uses edge-AI and Internet of Things (IoT) sensors to deliver situational awareness, security, and safety solutions. Originally built to measure out-of-home advertising audiences by passively detecting nearby mobile devices, Bulzi adapted its RF-sensing platform for defense and public-safety missions with roughly $2M in SBIR funding from the U.S. Air Force and Army. Its products span passive C5ISR sensing (SAFER), base access control (z-BASE), and medical-grade vital-signs monitoring (BioSCOUT), serving warfighters and first responders alongside commercial advertising customers.
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.
Guardian RF
Guardian RF builds low-cost, passive radiofrequency sensors that make low-altitude airspace observable in real time. Founded in 2024 by three Georgetown physics majors, the company deploys palm-sized 'Scout' sensors that detect the control signals drones and their operators emit, triangulating both across a mesh network. Its systems have been battle-tested on the front lines in Ukraine and are now fielded at Vandenberg Space Force Base and across U.S. airports and event venues, turning drone detections into structured, shareable intelligence.
S2 Corporation
S2 Corporation is a Bozeman, Montana photonics company that reads the radio spectrum the way a hologram stores an image - all at once. Its core technology, spatial-spectral (S2) holography, uses a cooled, sugar-cube-sized crystal doped with rare-earth atoms as an optical computer that captures and processes radio frequencies across enormous instantaneous bandwidths (0.03 to 110 GHz). Packaged as the Extreme Bandwidth Analyzer and Correlator (EBAC), the technology serves electronic warfare, signals intelligence, RF spectrum monitoring, emitter geolocation, and data mining for U.S. defense and intelligence customers including DARPA and IARPA.
Lucas Raskin
Lucas Raskin is the co-founder and CEO of Guardian RF, a defense technology company building passive radiofrequency sensors that detect and track drones. A Georgetown physics major, he turned a 24-hour hackathon project into a Y Combinator-backed company, spent six months embedded with Ukrainian ground troops refining the technology in real combat, and landed on the 2026 Forbes 30 Under 30 list for Transportation and Aerospace. Guardian RF's palm-sized Scout sensors and Mosaic mesh network now protect critical infrastructure, defense assets and frontline soldiers from cheap, lethal drones.