Amazon deployed Just Walk Out technology in its Amazon Go stores, using cameras, sensors, and AI to automatically track which items shoppers pick up and charge them when they leave — eliminating checkout lines entirely.

Launched in Amazon Go stores in 2018, the technology combines computer vision, object recognition, sensor fusion, and deep learning. In July 2024, Amazon deployed a new multimodal foundation model that improved accuracy by analyzing all sensor data simultaneously. As of 2025, the technology operates in over 375 third-party locations including stadiums, airports, universities, and hospitals in the US, UK, Australia, France, and Canada. In April 2024, Amazon removed Just Walk Out from its own Amazon Fresh grocery stores. Amazon disputed reports that human workers in India were reviewing transactions in real time, stating annotators were improving machine learning models, not generating receipts.