Larger robot vacuums can struggle to fit beneath furniture and into other tight spaces. Roomba Duo tackles that problem with a large cleaning robot that carries a smaller companion robot and lowers it to the floor using a mechanical arm on top. iRobot presented the two-robot system as a concept at IFA 2026.

The main unit handles regular vacuuming and mopping, while the roughly 8.35 cm-tall companion can enter places the larger robot cannot. Both share the same home map, dividing the job between two machines of different sizes.