The Fourth Law
Kyiv AI-autonomy startup whose TFL-1 module bolts computer-vision terminal guidance onto any FPV drone, flying the jam-blind last 500m into the target; Axon- and Brave1-backed, fielded across 50+ Ukrainian units.
Background
The Fourth Law (TFL) was founded in Kyiv in 2023 (November, per multiple accounts) by serial entrepreneur Yaroslav Azhnyuk — the founder behind pet-camera maker Petcube (Y Combinator W16, 1M+ devices), Fuel Finance and O0/Ozero Design — who pivoted into military tech and launched TFL alongside a sister company, Odd Systems, which builds thermal cameras (the Kurbas line) and FPV drones. The name nods to Asimov's Three Laws of Robotics plus an 'enigmatic fourth.' TFL's thesis is blunt: massively scalable drone autonomy is the single most important defense technology of the decade.
Its flagship, the TFL-1, is a low-cost onboard module that hands control to computer-vision AI for the final ~400-500m of an FPV drone's flight — the 'radio shadow' where Russian jamming and GNSS denial routinely sever the pilot's link. Rather than lock onto a loose cluster of pixels, its neural nets identify and box a specific vehicle and fly into its center; three modes cover manual, AI-targeting and an armored-tuned neural mode. TFL frames a five-stage autonomy ladder — terminal guidance (fielded), guided bombing, autonomous target detection/engagement, GPS-denied navigation, then full autonomy and swarming. The company runs offices in Ukraine, the US and the EU.