"See the invisible. Detect weapons. Save lives." An MIT spinout put an airport scanner on a chip.
The company mark. Behind it: three generations of custom silicon and a founder who spent a decade at MIT so a two-pound box could do the work of a room-sized machine.
There is a genre of technology problem that sounds like science fiction until someone quietly ships it, and then it sounds obvious. Cambridge Terahertz is working on one of those. The pitch, stripped of jargon, is this: take the see-through power of an X-ray, add the 3D depth-mapping of lidar, run the whole thing on radio waves that are safer than the phone in your pocket, and shrink it from an airport-sized security portal into a device that weighs about two pounds and mounts on a wall like a security camera.
If that sounds like a lot of physics to fit in a small box, it is. The interesting thing about Cambridge Terahertz is not that it invented terahertz imaging - the terahertz band, that awkward slice of the spectrum between microwaves and infrared, has fascinated physicists for years precisely because it passes through clothing, plastic, paper, ceramics and cardboard while bouncing off metal, skin and explosives. The interesting thing is that they made it small and cheap. Terahertz imaging historically required a room full of equipment. Cambridge Terahertz put it on a chip. That is the whole business, and it is harder than it sounds.
The company was founded in 2023 by Nathan Monroe, who earned his PhD at MIT in terahertz integrated electronics in 2022 and had, by then, already demonstrated an early solid-state terahertz radar imager that showed up in MIT News and TechCrunch. The origin story is not a garden-variety "two engineers had an idea." Monroe has said his high school principal was killed in a school shooting - the kind of event that reroutes a life. He spent more than a decade at MIT on a technology that, among other things, can spot a concealed firearm before anyone has to run.
The sensor doesn't care much whether the concealed thing is a knife under a jacket or a returned blender inside a sealed carton. The physics is the same; the market is not.
Sees through clothing and bags to flag firearms, knives, explosives, 3D-printed guns and contraband - metallic and non-metallic alike - with no pat-down and no stop-and-search.
AI reads the terahertz imagery in real time, reduces false positives, and issues an anonymized alert. It captures no personal images - privacy is designed in, not bolted on.
The same chip images the contents of a sealed, unopened box - useful for return-fraud checks, supply-chain visibility, and non-destructive inspection in aerospace and medical.
A palm-sized, pyramid-shaped, roughly two-pound unit that mounts like a camera. Airport-grade screening for schools, hospitals, venues, warehouses and government buildings - without the airport.
A cloud layer that visualizes sensor data, aggregates it across a network, and pushes anonymized threat alerts into the tools security teams already use via standard APIs.
Verify what's inside a returned or shipped box without opening it. Return fraud is a $100B+ retail problem; knowing the contents is step one. This is the door Amazon walked through.
One of the only companies globally cleared to operate at terahertz frequencies the way it does - backed by a rigorous human-safety analysis. A regulatory moat, earned the slow way.
Announced July 2025. The notable name on the cap table is Amazon - whose $1B Industrial Innovation Fund doesn't back slideware, and which first met the company at a 2023 packaging-visibility pitch competition, not a weapons pitch.
| Round | Amount | Date | Lead |
|---|---|---|---|
| Seed | $12,000,000 | Jul 2025 | Felicis |
Physical-security screening is not an empty market. Legacy millimeter-wave and X-ray body scanners hold down airports; walk-through weapons-detection systems like those from Evolv Technology have pushed into schools and stadiums. Cambridge Terahertz is making a specific bet against all of them - that the winning form factor is small, cheap, camera-mountable and networked, rather than large, expensive and stationary.
It's a bet with a wrinkle that most competitors can't copy quickly: the FCC license. Operating at terahertz frequencies the way the company does required a human-safety analysis rigorous enough to clear a regulator, and that paperwork is a moat you can't raise your way around in a quarter. Whether the two-pound sensor beats the incumbent portal is a question the next couple of years of trials will answer. The company has letters of intent and four government contracts; it does not yet have scale. That's the honest state of play.
Note: at the time of writing the company maintains an active LinkedIn presence; no public YouTube demo reel or Twitter/X handle was verifiable. Product demos have been shown live at ISC West rather than posted publicly.
Cambridge Terahertz is an MIT spinout building a chip-based imaging system that combines the 3D vision of lidar with the see-through power of X-ray, but using human-safe terahertz waves at a thousandth the power of a cell phone. Shrunk from an airport-scale scanner into a palm-sized, two-pound device, its AI-powered sensors detect concealed weapons through clothing and bags, and can see inside sealed packages without opening them. Founded in 2023 by MIT PhD Nathan Monroe, the company raised a $12M seed round led by Felicis with participation from Amazon's Industrial Innovation Fund.
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