Theseus Robotics (YC F26) puts wheeled humanoid robots into supermarkets that keep their existing aisles and fixtures. After close, the robot moves product from the back of the store onto the shelf. While the store is open, it picks online grocery orders and hands them to customers. The company buys off-the-shelf two-armed wheeled humanoids and builds the software and models for the job, covering grasp and place across thousands of products, from yogurt cups to cases of water, plus stock rotation and a read of the delivery list and planogram. The launch video is from a Zurich store already running the system. Their robot, Theo, unboxes cartons, shifts trolleys, throws out packaging, and fills shelves after the lights go out, then switches to order picking during the day. Theseus reports restocking up to 400 units an hour and picking up to 40. Two robots are in live stores, with pilots lined up for up to 10 more in 2027, and the company says San Francisco is next. When Theo gets stuck, a person takes over with a VR headset, and that intervention is kept as training data. Theseus is a seven-person company in Zurich, founded in 2026. CEO Samarth Malhotra previously scaled the ecommerce business Parts World USA to $3 million in revenue. CTO Kristóf Floch researched learning-based control at ETH Zurich. CPO Ádám Weinhardt-Kovács previously deployed pick-and-place robots in live sorting centers at a pace matching human workers. They are allocating 2027 pilot slots with grocers, fashion stores, and drugstores in the US, Switzerland, and Germany. They cite more than 100,000 large grocery stores in the US and Europe where shelves are still filled by hand, mostly at night.