Stairs are the enemy of robot vacuums. There isn’t currently a single robot vacuum on the market that can climb a flight of stairs without human assistance. Even the best robot vacuums we recommend for their ability to cross obstacles, like the Dreame X50 Ultra and Roborock Saros Z70 , can only handle thresholds between two and three inches.

Eufy’s Marswalker may be the first robot vacuum to truly be able to tackle this problem. It’s a robot vacuum that looks a bit like a wheeled Mars rover with a tracked drive, the “smart crawler platform,” that allows it to ascend and descend staircases. Eufy demonstrated the feature for me in a video, and describes the platform as “four independently controlled arms” with a track-drive system that grips each step as it climbs. It’s also at Eufy’s

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