iRobot's Roomba has stayed on top despite many knockoffs

12:01 AM ET Wed, 29 May 2019

Worldwide sales of consumer robots reached $5.6 billion in 2018, and is expected to reach $19 billion by the end of 2025, and that's in no small part thanks to iRobot and the Roomba. But in order to stay at the top of the market, iRobot has launched even more cleaning robots.