Yelp's Eat24 food delivery service partnered with robotics startup Marble to build a food-delivery robot. Although it only delivers to San Francisco’s Mission and Potrero Hill Districts, for now.

    The robot uses cameras, ultrasonic sensors, and lidar to navigate. Customers are sent a four-digit code to get their food.

    Marble hopes to make delivery more efficient and affordable for restaurants. The company has received $4 million in seed funding to continue development and expansion.