Knightscope K5

The Knightscope K5 is an autonomous security robot developed by Knightscope, Inc. of Mountain View, California. Standing approximately 152 cm (5 feet) tall and weighing around 190 kg (420 lbs), the K5 patrols outdoor environments — car parks, corporate campuses, hospital grounds, shopping-centre perimeters, airports, and event venues — collecting data through 360-degree cameras, thermal imaging, LiDAR, sonar, radar, and audio sensors. It operates continuously, returning to a charging dock autonomously when the battery runs low.

Unlike humanoid or industrial robots, the K5 is not sold to end users. Knightscope offers it as a Security-as-a-Service (SAAS) subscription, typically priced at around $7–9 per hour — a cost Knightscope markets as well below the hourly cost of a human security guard when benefits, training, and attrition are factored in. The robot cannot physically intervene, make arrests, or carry weapons. Its purpose is data collection, anomaly detection, and deterrence: it reports what it sees and hears to a human operations centre, where personnel decide how to respond.

The K5 has been deployed at more than a hundred sites across the United States since commercial operations began in 2015, including hospitals, universities, sports stadiums, casinos, storage facilities, and, as of 2025, at least one US police department. A significant upgrade in 2025 expanded the K5's autonomous navigation capabilities, enabling it to cover larger and more complex environments than earlier generations. The robot is unarmed as a matter of stated policy, and Knightscope has consistently positioned the K5 as a civilian complement to — not a replacement for — human security staff.