COMPANY-00 / ORIGIN
Built by people who understand what can't be seen.
Underground threat scenarios are underserved by an industry built around above-ground sensing. The same sensor doctrine — GPS-synchronized timing, aerial line-of-sight, radio relay backhaul — breaks down completely below the surface. We built Tarysar to close that gap.
MISSION-01 / WHY UNDERGROUND
The problem with underground threat detection is not that sensing technology doesn't exist — it's that every existing system was designed for a different environment and adapted, badly, to underground. Broadband seismic instruments designed for geophysical survey have dynamic range tuned to earthquakes, not footfall cadence at 150m. Ground-penetrating radar products designed for utility survey run fixed antenna frequencies optimized for 1–3m utility depths, not the 3–15m range relevant to tunnel detection. Aerial ISR sees nothing below a meter of soil. Human entry protocols prohibit entry into the spaces that need monitoring.
The underlying failure is architectural: the sensing doctrine assumes the target environment has the same physics as above-ground. Underground, GPS timing is absent. Radio propagation attenuates 30–80 dB per meter of rock and concrete — the 915 MHz ISM band is the deepest practical comm frequency for mesh networking in tunnel geometries. The noise floor is set by geology, not electronics. None of the systems currently marketed for underground applications were designed against these constraints from the start.
Tarysar's architecture starts from those constraints. Comm protocol: sub-GHz LoRa mesh, no GPS sync required. Classification: edge-local on low-power processors, because cloud uplink is not available in operational environments. Fusion logic: Bayesian combination weighted per substrate profile, because single-modality detection in underground noise is not reliable. Built for the environment, not adapted to it.
FOUNDING-02 / ORIGIN
Founded in 2024. Bootstrapped. Building in El Segundo.
Tarysar was founded in 2024 by Yadin Soffer and co-founders with backgrounds in acoustic signal processing, autonomous systems, and subsurface geophysics. The observation that drove the founding: every existing underground sensing product was an above-ground system with a new enclosure. None of the core architecture decisions — GPS timing dependencies, radio backhaul assumptions, cloud-side classification — had been rethought for what the underground environment actually requires.
The company is independently financed through the founding team. No external investors. No venture funding. That structure concentrates decision-making on field test outcomes and technical validation rather than investor milestone cycles. We move when the sensor data says to move.
We are based in El Segundo, California — within the defense industrial corridor that runs along the South Bay. The location gives us access to systems engineering and RF talent that has worked on programs relevant to the problems we're solving, and proximity to the procurement community that operates in that corridor.
LOCATION-03 / EL SEGUNDO
In the LA defense industrial corridor.
El Segundo, California is home to a dense concentration of defense, aerospace, and technology companies in the greater Los Angeles metro. The location shapes our talent pipeline — systems engineers, RF specialists, embedded software developers, and field operations personnel who have worked on programs relevant to the problems we're solving.
Proximity to the defense procurement community in Southern California matters for the early engagement conversations that drive initial program relationships. We do not claim partnerships with any established defense companies in the area.
222 N Sepulveda Blvd
El Segundo, CA 90245
United States
+1 (310) 426-8731
[email protected]
Work with us or partner.
We're looking for technical engineers, field operations specialists, and defense program partnerships. Early-stage companies move fast — the problems are hard and the team stays small by design.