Buying guide
Robot Vacuum Buying Guide (2026)
How to choose a robot vacuum: LiDAR vs camera navigation, self-empty bases, mopping reality, and what matters for pets, carpets, and stairs.
Navigation: LiDAR vs camera vs random
Navigation is the brain of the robot and the biggest predictor of satisfaction. LiDAR robots spin a laser to map rooms quickly and accurately, clean in neat rows, and work in the dark. Camera-based robots build maps visually and enable the best obstacle recognition, but can struggle in very dark rooms. Random-bounce robots have no map; they wander until the battery runs low. They are fine for small single rooms but miss spots and waste time in larger homes. If your home is over 800 square feet or has multiple rooms, get a mapping robot.
Self-empty base math
A self-empty base transfers debris from the robot into a larger bag automatically. Without one, you empty a tiny onboard bin after almost every run, which reintroduces the chore the robot was supposed to eliminate. With one, you replace a bag every one to two months. The math is simple: the base costs more upfront but is the difference between a gadget you babysit and an appliance you forget about. Pet owners and allergy sufferers benefit most, since emptying a bag is cleaner than shaking out a bin.
Mopping reality
Robot mopping ranges from symbolic to genuinely useful. Basic models drag a damp pad behind them, which spreads water around more than it cleans. Mid-tier mops add water flow control. The best systems vibrate or sonically scrub and lift the mop over carpet automatically. Even the best robot mop maintains floors rather than deep cleaning them; think of it as stretching the time between manual mops, not replacing them. If your home is mostly carpet, skip mopping entirely and put the money toward suction and navigation.
What matters for your home
Pets: tangle-resistant brushes, strong suction, self-emptying, and obstacle avoidance. Mostly carpet: suction and brush design matter more than mopping. Mostly hard floors: mopping quality and gentle navigation. Multiple floors: multi-floor mapping support so you can carry the robot upstairs without it relearning. Stairs and thresholds: check cliff sensors and the maximum threshold height the robot can climb; thick rugs and high door saddles stop some robots cold.
Questions, answered
LiDAR or camera navigation: which is better?
LiDAR maps faster and works in the dark; camera enables better object recognition. For most buyers either is fine. Avoid random-bounce navigation unless the robot is for a single small room.
How long do robot vacuums last?
Typically three to five years with normal use. Batteries are usually the first thing to degrade and are replaceable on most major brands. Brushes and filters are consumables to budget for.
Can one robot handle multiple floors?
Yes, if it supports multi-floor mapping. You carry the robot (and ideally its base stays on the main floor) and it loads the right map. No consumer robot climbs stairs.