ApplianceRank
Head-to-Head Comparison

Roomba j9+ vs Roborock S8 MaxV Ultra

i
iRobot Roomba j9+

iRobot

9.0/10(4,210 reviews)
$799$999-20%
on Amazon
Amazon PricePaid link. Price and availability are confirmed on Amazon.
R
Roborock S8 MaxV Ultra

Roborock

9.4/10(3,200 reviews)
$1,399$1,499-7%
on Amazon
Amazon PricePaid link. Price and availability are confirmed on Amazon.
Spec
iRobot
Roborock
Battery
120 min runtime
Dustbin
Auto-empty, 60-day capacity
Suction
3-Stage Cleaning
Navigation
PrecisionVision + iAdapt 3.0
LiDAR + AI
Smart Home
Alexa, Google, iRobot OS
Battery Life
180 minutes
Suction Power
6000 Pa
Dustbin Capacity
400 ml
Water Tank Capacity
200 ml

iRobot Roomba j9+

Pros

  • +Excellent obstacle avoidance
  • +60-day auto-empty dock
  • +Smart mapping with room-by-room control
  • +Great on carpets and hard floors

Cons

  • Expensive for a vacuum-only robot
  • Doesn't mop
  • Replacement bags add ongoing cost

Roborock S8 MaxV Ultra

Pros

  • +Advanced obstacle avoidance
  • +High suction power
  • +Self-emptying dock
  • +AI-powered navigation

Cons

  • High price point
  • Large dock size
  • Occasional app connectivity issues

⚖️ Our Verdict

The Roborock S8 MaxV Ultra is the better overall robot with superior suction and mopping, but the Roomba j9+ offers simpler setup and better obstacle avoidance for pet owners.

iRobot Roomba j9+

$799

Check Amazon PricePaid link. Price and availability are confirmed on Amazon.

Roborock S8 MaxV Ultra

$1,399

Check Amazon PricePaid link. Price and availability are confirmed on Amazon.