It might come as a surprise that "roomba" isn't the universal term for a robot vacuum. It is, in fact, a capital "R" that denotes Roomba as a proper noun — just one brand — rather than a generic trademark. Roombas are robot vacuums made by iRobot, and looking for the best Roomba to buy is a much more specific task than assessing the best robot vacuums in general, all brands included. However, Roomba's Band-Aid or Kleenex level fame really does prove just how iconic iRobot has become in the world of robotic vacuum cleaners.

Roomba's recognizability makes so much sense: Not only did iRobot launch the first successful commercial robot vacuum back in the day, but the company has consistently delivered some of the most reliable robot vacuum models for two decades. More than 20 Roombas have com

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