Robot Vacuum Obstacle Avoidance Test 2026: We Threw Everything at Them

Robot Vacuum Obstacle Avoidance: The Definitive 2026 Test

Obstacle avoidance is one of the most important — and most marketed — features of premium robot vacuums. Every manufacturer claims their AI can identify and avoid obstacles. We put those claims to the test with 73 different obstacles across 6 premium robot vacuums.

Our Testing Protocol

We placed each obstacle individually in the robot's cleaning path and recorded whether the robot:

We tested each obstacle 3 times and recorded the success rate.

The 73 Obstacles

Our obstacle list included:

Results

Key Findings

Pet waste avoidance: The iRobot Roomba j9+ and Roborock S8 MaxV Ultra both achieved 100% pet waste avoidance. The Dreame X60 Max Ultra had one failure in five tests (80%). The Narwal Freo X Ultra had two failures (60%).

Cable avoidance: All robots struggled with very thin cables (under 2mm diameter). The iRobot Roomba j9+ was the only robot to avoid all cable types tested.

Sock avoidance: Socks are notoriously difficult for robot vacuums. The iRobot Roomba j9+ avoided all sock tests; the Roborock S8 MaxV Ultra avoided 4 of 5.

Lego avoidance: All robots avoided Lego bricks successfully — the hard edges and bright colors make them easy to detect.

What the Failures Were

The two objects the Roborock S8 MaxV Ultra failed to avoid were a very thin (1.5mm) black cable on a dark floor, and a small dark sock that blended with the floor color. Both are edge cases that are difficult for any vision system.

Conclusion

The iRobot Roomba j9+'s 100% success rate is remarkable and reflects iRobot's years of experience in obstacle avoidance. For pet owners especially, this reliability is worth the premium price.