These are the delivery robots that will soon invade your city’s sidewalks

The robots are coming. Fortunately, they’re bringing groceries and takeout with them. Welcome to the world of delivery robots: one of the fastest-growing and most competitive markets in robotics.

The idea behind these bots is simple: The customer orders an item, that item is loaded into or onto the robot, and then the robot travels to the customer to drop it off. But that’s not stopped multiple intrepid companies from exploring their own innovative approaches to the challenge.

Here are six of the biggest names to watch out for when it comes to delivery robots. Coming soon to a sidewalk near you — if they’re not there already.