The best robot vacuums you can buy

Robot vacuums are impressive devices that will clean your floors well without complaining (much). As prices have dropped, these busy little bots have become less of a luxury and more of a necessity. They can reach places most standup vacs never see (under beds and sofas) and, thanks to better batteries and robot brains, rarely get tired of cleaning.

I’ve been testing robot vacuums for five years and have run close to 50 robot vacuums all…