How to choose a robot vacuum
Robot vacuums vary a lot in how they find their way around, how much upkeep they need and what they cost to run over time. These are the differences worth checking.
Navigation: lidar, camera or basic
Most robot vacuums use one of three approaches. Lidar models spin a laser sensor to map rooms and tend to work the same in the dark. Camera-based models use a camera to see the room, and some can recognize objects like cords or pet waste, though they can depend on room lighting. Basic models without mapping move in patterns and bump into things to find edges; they cost less but usually can't clean a single room on command or avoid no-go zones. If you want to send the robot to a specific room, look for mapping and saved maps in the app.
Self-empty docks: convenient, with ongoing costs
A self-empty dock sucks dirt out of the robot into a bag or bin in the base, so you empty it less often. Most docks use disposable bags, so check the price and availability of replacement bags. All robots also need new filters, side brushes and main brushes from time to time. Looking up the cost of those parts before you buy gives you the real cost of owning one.
Mopping types
Mopping robots range from a simple damp pad dragged behind the vacuum to spinning or vibrating pads, and some docks wash and dry the pads for you. Check whether the robot can lift its mop over rugs or must have the pad removed, and whether the dock needs a clean-water and dirty-water tank you refill and empty by hand. Read the manual for which floor types and cleaning solutions the maker allows.
Your home matters
Check the robot's listed height if you want it to clean under furniture, and how it handles thresholds and thick rugs. Homes with pets often benefit from rubber brushes that tangle less with hair. Stairs need cliff sensors, which most robots have, but each floor needs its own map or a robot that can store several.
App, Wi-Fi and privacy
Most mapping robots use an app and Wi-Fi, and some need an account to work at all. Camera-based models record images of your home to navigate, so read the maker's privacy policy for what's stored and whether it leaves the device. Check whether the robot still works with basic controls if the app or the company's servers go away.
Refurbished robots and warranty
Refurbished robot vacuums can be good value, but batteries and brushes wear out, so look for listings that say which parts were replaced and who backs the warranty. Buying from the brand or an authorized seller makes warranty claims simpler. Check the return window so you have time to test it in your own home.
Guide updated October 22, 2026.