Electronic Warfare Companies in the United States
Sensing, jamming and spoofing across the electromagnetic spectrum, plus directed energy and high-power microwave weapons. Ukraine has shown that drones live or die by their links, and US startups are building the receivers, jammers and microwave systems to match. Together they have disclosed $678M in funding, led by Epirus (>$550M). The newest round on record is Stellios Technologies's Pre-seed (Oct 2026).
Patriot air defense radar forward deployed in Poland, 2019. Photo: U.S. Army 10th AAMDC photo by Sgt. 1st Class Christopher Smith, Public domain (PD-USGov-Military-Army).
Latest rounds
| Date | Company | Round | Amount | HQ | Sector |
|---|---|---|---|---|---|
| Oct 2026 | Stellios Technologies | Pre-seed | $5M | Austin, TX | Electronic Warfare |
| Aug 2026 | Aurelius Systems | Series A | $40M | San Francisco, CA | Electronic Warfare |
| May 2025 | CX2 | Series A | $31M | El Segundo, CA | Electronic Warfare |
| Mar 2025 | Epirus | Series D | $250M | Torrance, CA | Electronic Warfare |
| Mar 2025 | Distributed Spectrum | Series A | $25M | New York, NY | Electronic Warfare |
All companies
Full directoryStellios Technologies
Austin, TexasDevelops high-power microwave and directed energy systems, first for counter-drone defense, using gyrotron know-how from the founders' earlier microwave launch work.
Aurelius Systems
San Francisco, CaliforniaBuilds Archimedes, a lightweight high-energy laser turret combining machine vision and radar to shoot down drones, with operations in San Francisco and Detroit.
CX2
El Segundo, CaliforniaBuilds software-defined electronic warfare hardware and software, including the Wraith airborne EW platform, to contest the electromagnetic spectrum.
Epirus
Torrance, CaliforniaBuilds Leonidas, a solid-state, software-defined high-power microwave system that disables drone swarms and electronics.
Distributed Spectrum
New York, New YorkBuilds low-cost AI radio-frequency sensors and software that detect, classify and locate signals such as jammers and drone links across wide areas.
Questions
Who are the biggest electronic warfare companies in the US?
By disclosed funding among the companies we track: Epirus, Aurelius Systems, CX2 and Distributed Spectrum, as of November 14, 2026.
How many electronic warfare companies are in the US?
Our directory lists 5 privately held US electronic warfare startups as of November 14, 2026. Large primes and public companies are not included.