Apple and Google alums have unleashed self-driving food delivery robots in San Francisco

Tthe next time you place an order on Yelp's Eat24 food delivery app in San Francisco, you might just get a text that reads: "Are you okay with having a robot delivering your order?"

On April 12, robotics startup Marble will unleash its fleet of shopping-cart-sized, self-driving robots to take over some of the work done by human couriers at Yelp Eat24, the food-delivery service bought by Yelp for $134 million in 2015. The bots ferry food from restaurants in the Mission and Potrero Hill neighborhoods to customers nearby.

Marble, which has a team that includes former employees of Apple and Google, is the first company to bring on-demand delivery robots to the streets of San Francisco. The startup faces competition from Starship Technologies, which has smaller robots that began making food deliveries in Silicon Valley in March, as well as Dispatch, whose delivery robots were spotted learning the streets of San Francisco in February.

Business Insider visited Marble's headquarters to see how the bot works.