Milliray: Sensor fusion for the small-drone threat

Milliray builds millimeter-wave radar and sensor systems to detect and track small drones. It fits airports, critical infrastructure, defense and venue operators where low-signature drones create a security problem and false positives make a conventional alert stream unusable.

What it does

Milliray’s current site ↗ describes a sensor stack that combines millimeter-wave radar, camera and acoustic inputs to detect, track and classify small UAVs. It can run as a standalone site or as a distributed network, with onboard compute for low-latency detection in all-weather environments. The listed targets range from small quadcopters to autonomous swarms.

The product decision is about the first detection layer. Milliray is not presenting a generic computer-vision model that can be trained on a new camera feed. It is selling hardware and sensor fusion designed around low-signature drones, clutter and perimeter coverage. The current site describes airport, critical-infrastructure and defense deployments with different operating constraints, so a buyer needs a site-specific test rather than a generic “drone detection” demo.

The company’s YC launch ↗ describes radar integrated with camera and acoustic arrays and says the system can operate standalone or as part of a network. It also lists support from UK Defence and Security Accelerator, NATO DIANA and the Royal Academy of Engineering. Those are public program and company claims, not an independent detection-rate or false-positive benchmark.

Founder context and tradeoffs

The YC profile identifies Matthew Moore, Thomas Doherty and Jordina Frances de Mas as founders. Their public backgrounds include millimeter-wave radar, atomic and laser physics, automated reasoning and machine learning. That technical mix is directly relevant to the sensor stack.

Pricing is not public. A buyer should ask about detection range, birds and clutter, weather, maintenance, spectrum, integration with existing command systems, data retention and response policy. Detection is only the first part of counter-UAS operations; it does not by itself authorize or execute a response.

Editorial take

I would shortlist Milliray for a site with a defined low-altitude drone threat and an existing security operation that can run a controlled evaluation. The proof should be a known perimeter, known clutter and a shared definition of a useful detection. If the problem is only occasional visibility, a full sensor stack may be more than the site needs.

Quick facts

Sources checked

Cohort context

Milliray is listed in Winter 2026. In our 2026-09-18 directory snapshot, 28 of 199 listed companies in that cohort have YC’s primary industry label Industrials (14.1%). This is a current-directory comparison, not an original intake count or a performance ranking. Nine-cohort dataset.

Public website snapshot

Observed 2026-09-19 16:20 UTC in raw homepage HTML. This records visible metadata and advertised links, not agent execution or product quality.

Public observations · Collection method. Missing links here do not establish that a capability or file is absent elsewhere.