ZaiNar Raises $100M to Build a Location Layer for Physical AI and Robots

ZaiNar emerged from nine years of stealth with over $100 million in funding and a valuation above $1 billion. The Belmont, California company built a platform that turns existing wireless networks — 5G, Wi-Fi, private cellular — into a continuous sensing system that knows where everything is, without cameras, GPS, satellites, or extra hardware. The core breakthrough is sub-nanosecond time synchronization across radio signals, which translates to sub-meter positioning accuracy indoors, outdoors, and through walls. For robots, this solves a fundamental problem: current AI systems lack the real-time, centralized location data needed to move reliably in physical spaces. GPS fails indoors, cameras drift without heavy compute, and UWB beacons cost thousands per facility. ZaiNar claims its approach works with infrastructure already deployed worldwide, potentially giving home and industrial robots a universal positioning layer that works everywhere.