Roborock

Roborock started as a Xiaomi-ecosystem partner and grew into arguably the most technically aggressive brand in the category, usually the first to ship a genuinely new mechanism rather than a marketing refresh: retracting LiDAR towers that dip under furniture, dual spinning mop pads under real downward pressure, and, most recently, a five-axis folding arm on the Saros Z70 that physically picks small objects up out of the robot's path.

Its current range splits into three tiers that cover most budgets: the value-focused Q series, the near-flagship Qrevo line built around fully automated docks, and the Saros and S-series flagships at the top. That range depth is Roborock's real advantage, someone can stay loyal to the brand's app and ecosystem while moving from a budget robot to a flagship as their needs or budget change, without switching to a competitor to get either end of the price scale.